the formulations object of the present invention must overcame several targets simultaneously , in between other things , to obtain some formulations that comply with the high quality standards of the fao / who for plant protection products ( without prejudice that other formulations may not comply with all such requirements is needed for a particular purpose ). the problem is to find easily redispersible ods of neonicotinoids , wherein the active ingredient ( s ) are not degraded significantly , with decreased wet sieving residue ( below 1 %), and with excellent emulsification properties , while maintaining the biological activity . decrease the particle size to improve the emulsion properties to obtain highly homogeneous and stable solutions to spray decrease the particle size finding an appropriate surfactant system to improve the biological efficacy instead of the prior art way of increasing the content of penetrants ( focused only in fatty alcohol ethoxylates / propoxylates ). decrease the wet sieve residue ( indirectly reflecting redispersibility ) by means of using certain surfactant systems and even improved with the use of polyvalent cationic salts milled with the formulation contain at least a neonicotinoid compound at 0 . 5 - 40 wt .-% has a median particle size when measured in emulsion in water with a laser diffraction particle mastersizer of less than 2 μm and a percentile 90 of less than 5 μm do not present bleeding over 1 % in volume of the formulation when letting it rest at room temperature for 4 days do not present neither oil nor cream separation after 2 hours in the emulsification test ( 5 % of formulation in water , in measuring cylinder of 100 ml ). the solution to the problems addressed has being found to be oil suspensions or oil dispersions ( synonym ) formulations characterized in that they contain , with regard total weight of the oil dispersion formulation : a . at least a neonicotinoid , or mixtures thereof , at 0 . 5 - 40 wt .-% b . a mixture of nonionic polymeric oil dispersants made of polyethoxylated glycol ester of a ( poly ) hydroxylated fatty acid chain with 12 - 20 carbons at 0 . 5 - 8 wt .-% with a hlb of 4 - 6 and a copolymer of type a - b - a of fatty acid with a chain of 12 - 20 carbons at 0 . 5 - 5 wt .-% c . a mixture made of polyethoxylated fatty alcohol at 0 . 5 - 15 wt .-%, and / or polypropoxylated fatty alcohol at 1 - 25 wt .-%, with a hlb of 12 - 16 d . at least a polyethoxylated and / or polypropoxylated sorbitan derivative at 3 - 30 wt .-%, with a hlb of 12 - 16 e . an alkylbenzenesulfonate sodium or calcium salt , being the alkyl chain of 10 - 14 carbon atoms , at 3 - 19 wt .-% f . a di -, tri - or tetra - valent cationic salt at 0 . 001 to 3 wt .-% g . an oil phase selected from paraffinic , naphtha aromatic , vegetable , synthetically modified vegetable oils ; and mixtures thereof , at 30 - 70 wt .-%. h . optionally , non - ionic , anionic or cationic surface active ingredients not mentioned in claim 1 b , antioxidants , uv - and sun - light protectors , antimicrobial agents , ph regulators , viscosity modifiers selected from aluminium magnesium silicates , magnesium silicates , aluminosilicates , clays , modified clays , smectite , modified smectite , and present preferably at 0 . 1 - 5 wt .-%, antifoam , colouring agents , markers for traceability of the origin of the product , wherein the sum of all such compounds is not higher than 7 wt .-%, wherein the presence of other surface active ingredients than those of b ., c ., d . and e . is up to a maximum of 5 wt .-%, preferably . a preferred formulation contains ( always referred to total weight -% of the oil dispersion ): a . at least a neonicotinoid selected from imidacloprid , thiamethoxam , thiacloprid , nitenpyram , acetamiprid , clothianidin , dinetofuran at 5 - 35 wt .-% b . a mixture of nonionic polymeric oil dispersants made of polyethoxylated glycol ester of a ( poly ) hydroxylated fatty acid chain with 12 - 20 carbons at 0 . 5 - 8 wt .-% with a hlb of 4 - 6 and a copolymer of type a - b - a of fatty acid with a chain of 12 - 20 carbons at 0 . 5 - 3 wt .-% c . a mixture made of 15 - 25 mols polyethoxylated stearyl alcohol at 0 . 5 - 10 wt .-%, 15 - 25 mols polyethoxylated oleyl alcohol at 0 . 5 - 10 wt .-% and 10 - 20 mols polypropoxylated monostearyl ether at 1 - 15 wt .-%, with a hlb of 12 - 16 d . a mixture made of 15 - 25 mols polyethoxylated sorbitan trioleate or tristearate at 5 - 20 wt .-% and 20 - 50 mols polyethoxylated sorbitan hepta - 9 - octadecenoate at 2 - 20 wt .-%, with a hlb of 12 - 16 e . calcium or sodium dodecylbenzenesulfonate at 3 - 19 wt .-% f . a paraffinic or vegetable oil at 30 - 70 wt .-% g . a modified smectite at 0 . 3 - 1 . 5 wt .-% h . aluminium sulphate in anhydrous , monohydrate or any hydrated state at 0 . 005 to 0 . 3 wt .-% i . an organomodified smectite at 0 . 3 - 3 wt .-%. the presence of the inorganic salt produces an pronounced effect , synergistic with the presence of compounds included in b . above ( see comparative examples 13 to 16 ), a sulphate or chloride , or phosphate of aluminium , magnesium , manganese , zinc , iron , copper , nickel , boron , gallium , indium , or mixtures thereof , in dehydrated or any hydration state . preferred salt is aluminium sulphate , an most preferably monohydrated . the compounds in which the formulations work especially well are the neonicotinoids with compounds ( i ) as stated above with formula a -( ch2 )— b preferred neonicotinoids are imidacloprid , thiamethoxam , thiacloprid , nitenpyram , acetamiprid , clothianidin , dinetofuran , in any of their isomeric or stereoisomeric forms when present and in any of their crystallization forms , salts thereof ; and any mixtures thereof . the formulation has been intensively tested for imidacloprid . however , other neonicotinoids behave as imidacloprid . the invention is also appropriate to combine other additional biologically active ingredients with at least one neonicotinoid , wherein such additional biologically active ingredient is selected from the group : insecticide , aracnicide , raticide , herbicide , fungicide , plant growth regulator , insect growth regulator , antibiotic , vitamin , oligoelement , fertilizer . preferred combinations with neonicotinoids are the compounds : 2 , 4 - d ; 2 , 4 - db ; alpha - cypermethrin ; amitrole ; benalaxyl ; bentazone ; beta - cyfluthrin ; bromoxynil ; carbendazim ; chlorothalonil ; chlorpropham ; chlorpyrifos ; chlorpyrifos - methyl ; chlorotoluron ; cyfluthrin ; cypermethrin ; daminozide ; deltamethrin ; desmedipham ; dinocap ; diquat ; esfenvalerate ; ethofumesate ; fluoroxypyr ; flusilazole ; glyphosate ; imazalil ; ioxynil ; iprodione ; isoproturon ; lambda - cyhalothrin ; linuron ; mancozeb ; maneb ; mcpa ; mcpb ; mecoprop - p ; metiram ; metsulfuron ; molinate ; pendimethalin ; phenmedipham ; propiconazole ; propineb ; propyzamide ; pyridate ; thiabendazole ; thifensulfuron ; thiophanate - methyl ; thiram ; triasulfuron ; warfarin ; ziram ; captan ; clodinafop ; clopyralid ; cyprodinil ; dichlorprop - p ; dimethoate ; dimethomorph ; diuron ; ethepon ; ethoprophos ; fenamiphos ; fipronil ; folpet ; formetanate ; fosetyl ; glufosinate ; metconazole ; methiocarb ; metribuzin ; oxamyl ; phosmet ; pirimicarb ; pirimiphos - methyl ; propamocarb ; pyrimethanil ; rimsulfuron ; tolclofos - methyl ; tolylfluanid ; tribenuron - methyl ; triclopyr ; trinexapac ; triticonazole ; abamectin ; avermectins ; aclonifen ; amidosulfuron ; benfluralin ; bensulfuron ; bifenox ; chloridazon ; clofentezine ; clomazone ; cymoxanil ; dicamba ; difenoconazole ; diflubenzuron ; diflufenican ; dodemorph ; epoxiconazole ; fenoxaprop - p ; fenpropidin ; fenpropimorph ; fonpyroximate ; fluazinam ; fludioxonil ; flutolanil ; fuberidazole ; imazaquin ; lenacil ; calcium phosphide ; magnesium phosphide ; mepiquat ; metamitron ; metazachlor ; nicosulfuron ; oxadiazon ; picloram ; prosulfocarb ; pyriproxyfen ; quinoclamine ; sodium 5 - nitroguaiacolate ; sodium o - nitrophenolate ; sodium p - nitrophenolate ; sulcotrione ; tobuconazole ; tebufenpyrad ; tralkoxydim ; triadimenol ; bacillus thuringiensis ; beauveria bassiana ; cydia pomonella granuiosis virus ; lecanicillimu muscarium ; metarhizium anisopliae ; phlebiopsis gigantean ; pythium oligandrum ; streptomyces k61 — streptomyces griseoviridis ; trichoderma atroviride ; trichoderma harzianum rifai ; trichoderma polysporum ; trichoderma aspellerum ; trichoderma gamsii ; verticillium albo - atrum ; ethylene ; gibberellic acid ; gibberellin ; pyrethrins ; acibenzolar - s - methyl - benzothiadiazole ; ampelomyces quisqualis ; azimsulfuran ; azoxystrobin ; bacillus subtilis ; beflubutamid ; benthiavalicarb ; benzoic acid ; bifenazate ; boscalid ; carfentrazone - ethyl ; clothianidin ; coniothyrium minitans ; cyazofamid ; cyclanilide ; cyhalofop - butyl ; haloxyfop ; dimethenamid ; dimoxystrobin ; etoxazole ; ethoxysulfuron ; famoxadone ; fenamidone ; fenhexamid ; flazasulfuron ; florasulam ; flufenacet ; flumioxazin ; fluoxastrobin ; flupyrsulfuron methyl ; flurtamone ; foramsulfuron ; forchlorfenuron ; fosthiazate ; gliocladium catenulatum ; imazamox ; imazosulfuron ; indoxacarb ; iodosulfuron - methyl - sodium ; iprovalicarb ; isoxaflutole ; kresoxim - methyl ; laminarin ; mepanipyrim ; mesosulfuron ; mesotrione ; metalaxyl - m ; methoxyfenozide ; metrafenone ; milbemectin ; oxadiargyl ; oxasulfuron ; paecilomyces fumosoroseus ; paecilomyces lilacinus ; pethoxamid ; picolinafen ; picoxystrobin ; prohexadione - calcium ; propoxycarbazone ; prosulfuron ; prothioconazole ; pseudomonas chlororaphis ; pymetrozine ; pyraclostrobin ; pyraflufen - ethyl ; quinoxyfen ; s - metolachlor ; silthiofam ; spinosad ; spiroxamine ; spodoptera exigua nuclear polyhedrosis virus ; sulfosulfuron ; tepraloxydim ; trifloxystrobin ; tritosulfuron ; zoxamide ; bifenthrin ; etofenprox ; propaquizafop ; teflubenzuron ; tetraconazole ; triflusulfuron ; zeta - cypermethrin ; chlormequat ; chlorsulfuron ; cyromazine ; dimethachlor ; diphenylamine ; lufenuron ; penconazole ; quizalofop - p ; triallate ; triazoxide acequinocyl ; adoxophyes orana ; aminopyralid ; amisulbrom ; aureobasidium pullulans ; benalaxyl - m ; bispyribac sodium ; candida oleophila ; chlorantraniliprole ; chromafenozide ; cyflufenamid ; disodium phosphonate ; emamectin benzoate ; fen 560 ; flonicamid ; flubendiamide ; fluopicolide ; gamma - cyhalothrin ; halosulfuron methyl ; helicoverpa armigera nucleopolyhedrovirus ; heptamaloxyglucan ; ipconazole ; mandipropamid ; metaflumizone ; meptyldinocap ; novaluron ; orthosulfamuron ; paecilomyces fumosoroseus ; penoxsuiam ; phosphane ; pinoxaden ; profoxydim ; proquinazid ; pseudomonas sp . starin ; pseudozyma flocculosa ; pyridalyl ; pyroxsulam ; silver thiosulphate ; spinetoram ; spirodiclofen ; spiromesifen ; spirotetramat ; spodoptera littorals nucleopolyhedrovirus ; tembotrione ; thiencarbazone ; topramezone ; trichoderma atroviride ; valiphenal ; zucchini yellow mosaic virus . preferred are the combinations of imidacloprid with those abovementioned pesticides , combinations of acetamiprid with those pesticides , combinations of thiacloprid with those pesticides or combinations of thiamethoxam with those pesticides . the oil dispersions according the present invention may contain additionally suspended microcapsules enclosing neonicotinoids and / or other pesticides than neonicotinoids , as those abovementioned . the formulations according this invention are very appropriate for its use as a method to kill insects in the fields or house and garden , as well as mites , fleas ( e . g ., in capilar lotion in pharmacy ), spiders and / or ticks ( application to animals ) in agricultural , veterinary or medicinal applications . regarding the compounds used in the examples , they are widely distributed by a multitude of distributors , including active ingredient have not been addressed in the source information . the white oil must be understood as any paraffinic oil , also known in commercial products by “ basisöl ”, isopar ®, marcol ®, puccini ® ( wherein the dmso extract content is below 3 %), and many other known commercial compounds used as well as basic paraffinic oils in cosmetic formulations , with the proviso that they are , of course , excluded from any known risks of carcinogenicity . the use of naphta solvents is possible but not recommended for toxicological profile reasons . in any case is recommended the use of naphthalene depleted fractions . we have found best results with paraffinic or vegetable or modified vegetable oils . the preferred modifications to vegetable oils are those that impart to them more stability or handling advantages ( as decreased viscosity ). alkylated oils , saponified oils , transisomerized oils , epoxidized oils are to be taken in consideration when performing this invention as possible oils . however , we prefer the use of highly saturated vegetable oils ( or derivatives thereof ) since they provide stability to the formulation . we have observed that some “ pure ” vegetable oils , with moderate content of unsaturations , and worst , highly unsaturated , even in the presence of bht , produce with time hydroperoxides and then free radicals that , in combination with uv - and / or sun - light lead to a faster degradation of the neonicotinoids . in general gums ( as rosin gum ) and the like shall be understood to fall into the concept vegetable oil . note as well that paraffins are also noted sometimes as waxes , denomination that shall not affect the extent of protection . the fact in that in the examples there are no mixtures of active ingredients is due to give a broad overview of the formulation , while maintaining a reasonable amount of data . the inventors have verified that the benefit of the claimed compositions are as well present for : mixtures of different oil types , specially mixtures of vegetable ( and derivatives thereof ) and paraffinic oils mixtures of active ingredients within the group of neonicotinoids and neonicotinoids and other pesticides , preferable not in the form of salts use of non preferred ( not claimed in specific necessary features ) surface active ingredients that amount not more than 5 wt .-% use of coformulants as needed for the formulation ( antifoams , antioxidants , uv and sun - light protectors , fluorescent or other type of markers to trace the origin of the ware in the market , antimicrobial agents , ph regulators , viscosity modifiers , antifoam , coloring agents , provided that the use of non preferred surface active ingredients and / or these compounds is not higher than 7 wt .-% the skilled in the art shall immediately notice when a non - preferred surfactant ( or a non - neonicotinoid pesticide ) is not compatible with the formulation according our invention by the presence within 24 hours of precipitates in the finished formulation ( that shall be according the invention an homogeneous fluid ) or rapid decomposition ( within 24 hours more than 2 % of decomposition ) of the active ingredient neonicotinoid . this is said without prejudice in that we have not found any compound that falls under this exception , and therefore the claim works in the whole claimed range , and of course with more security , at the view of the recommendation of the description . an important aspect of the present invention is the possibility to combine the claimed od with other suitable formulation types as emulsion concentrate , emulsion in water , suspoemulsion , suspension concentrate ( in water ), and particularly with capsule suspensions . the general method for these combination was firstly published by the same inventors in ep 1844653 - a1 . we refer specially for the combination of od of neonicotinoids with any other pesticides present in other formulation types ( or even as well in the form of od whether as disclosed herein or in a prior art type , having into account that then , the total stability will decrease ), but preferably , with those parasiticides ( e . g ., ectoparasites for animal and human health ) or insecticides / acaricides that may overcome problems of resistance to neonicotinoids , in the fields of agriculture , pharmacy or veterinary and fisheries . particularly interesting are the mixtures : imidacloprid + spinosad , imidacloprid + abamectin , imidacloprid + methoprene , imidacloprid buprofezin , imidacloprid + azadirachtin , imidacloprid + cyromazine , imidacloprid + fenoxycarb , imidacloprid + lambda - cyhalothrin , imidacloprid + gamma - cyhalothrin , imidacloprid + acrinathrin , imidacloprid + allethrin , imidacloprid + alpha - cypermethrin , imidacloprid + beta - cyfluthrin , imidacloprid + beta - cypermethrin , imidacloprid + bifenthrin , imidacloprid + bioallethrin , imidacloprid + bioresmethrin , imidacloprid + cycloprothrin , imidacloprid + cyfluthrin , imidacloprid + cyhalothrin , imidacloprid + cypermethrin , imidacloprid + cyphenothrin , imidacloprid + deltamethrin , imidacloprid + empenthrin , imidacloprid + esfenvalerate , imidacloprid + fenpropathrin , imidacloprid + fenvalerate , imidacloprid + flucythrinate , imidacloprid + flumethrin , imidacloprid + imidaclopridprothrin , imidacloprid + methothrin , imidacloprid + permethrin , imidacloprid + phenothrin ( 1 - r - trans ), imidacloprid + prallethrin , imidacloprid + resmethrin , imidacloprid + ru 15525 , imidacloprid + tau - fluvalinate , imidacloprid + tefluthrin , imidacloprid + tetramethrin ( 1 - r ), theta - cypermethrin , imidacloprid + tralomethrin , imidacloprid + transfluthrin , imidacloprid + zeta - cypermethrin , imidacloprid + zxi 8901 , imidacloprid + ethiprol , imidacloprid + fipronil , imidacloprid + bistrifluoron , imidacloprid + chlorfluaturon , imidacloprid + diflubenzuron , imidacloprid + flucycloxuron , imidacloprid + flufenoxuron , imidacloprid + hexaflumuron , imidacloprid + lufenuron , imidacloprid + novaluron , imidacloprid + noviflumuran , imidacloprid + teflubezuron , imidacloprid + triflumuron , imidacloprid + szi - 121 , imidaclorpid + at least one microbial pesticide . it is also disclosed herein explicitly all the mixtures abovementioned wherein imidacloprid is substituted by thiacloprid . this applies as well to thiamethoxam , which mixtures with the abovementioned pesticides are fully disclosed . in the same way , all the above mixtures are herein disclosed in full with dinetofuran instead imidacloprid . last , such full and explicit disclosure includes mixtures of acetamiprid with the pesticides disclosed above as well as with clotianidin . we avoid unnecessary repetition of the mixtures as disclosed and claimed . it is as well disclosed ternary or quaternary mixtures of at least one neonicotinoid and at least one of the cited compounds parasiticides . of the mixtures cited for parasiticides , the preferred embodiments are ods wherein the neonicotinoids ( at least one ) are suspended in the od and the other parasiticides are enclosed in microcapsules , most preferably , polyurea or polyurea - glycoluril microcapsules ( which can be obtained as best option according prior art ep 1840145 - a1 ( casaña - giner , v . ; gimeno m . and gimeno b .). the combination of ods with other suitable formulation types are disclosed in ep 1844653 - a1 ( casaña - giner , v . ; gimeno m . and gimeno b .) such microcapsules contain in the core preferably an oily phase ( normal phase microcapsules ) but they may contain as well a water phase with dispersed or dissolved parasiticides active ingredients ( reverse phase microcapsules ). in making such mixtures , care must be taken with the use of aluminium sulfate or other used multivalent cationic salt , since values over 0 . 3 wt .-% may provoke flocculation of the microcapsules . however , as shown in the example , the benefit of such use in the od is still beneficial and at the level of the example , is not prejudicial for the stability of the cx formulation ( od + cs ). for a better understanding of the examples , the following table is provided for allowing the skilled in the art to find the many commercial options that correspond to the selected components of the formulations , and to compare with the prior art . in no way , the following list is presented in a restrictive way , and any chemical class as claimed may be replaced by other commercial ( or non - commercially made ) compounds that belong to the same classes are clearly specified in the claims . table 2b content in wt .-% 10 ex . 10 ex . 11 ex . 12 ex . 13 ex . 14 ex . 15 ex . 16 ex . 17 ex . 18 imidacloprid 20 . 6 18 . 3 27 21 . 8 21 . 8 21 . 8 21 . 8 20 20 . 67 corn oil 0 0 0 0 0 0 0 0 0 sunflower oil 0 0 0 0 0 0 0 0 0 white oil 0 42 . 75 0 48 48 . 15 49 48 . 15 40 . 69 0 methylated coconut oil 43 0 43 0 0 0 0 0 46 . 68 atlox 4894 0 0 0 0 0 0 0 0 0 atlox 4838b 0 0 0 0 0 0 0 0 0 atlox 4912 4 4 . 2 3 2 2 0 0 5 2 . 1 atlox 4913 0 0 0 0 0 0 0 0 0 atlox mba 13 / 20 0 0 0 0 0 0 0 0 0 atlox lp1 2 2 . 5 3 2 2 0 0 5 3 . 4 atlox ps2 0 0 0 0 0 0 0 0 0 atlas g - 1281 0 0 0 0 0 0 0 0 0 arlamol e 1 3 4 3 3 3 3 0 2 arlatone t 1 3 0 2 2 2 2 9 2 genapol la 050 1 . 9 3 2 0 0 3 4 19 0 brij 98 1 1 0 0 . 4 0 . 4 0 . 4 0 . 4 0 1 brij 721 1 1 0 0 . 4 0 . 4 0 . 4 0 . 4 0 1 tween 80 10 4 7 . 4 8 8 8 8 0 0 tween 85 0 12 . 9 0 0 0 0 0 0 9 borresperse na 0 0 0 0 0 0 0 0 0 calsogen ar 100 nd 6 4 10 12 12 12 12 0 11 bentone sd1 1 0 . 2 0 0 . 2 0 . 2 0 . 2 0 . 2 0 1 aluminium sulfate 0 . 09 0 . 1 0 . 2 0 . 15 0 0 . 15 0 0 . 1 0 . 15 bht 0 . 1 0 0 . 35 0 0 0 0 0 . 2 0 escalol 509 0 . 09 0 0 0 0 0 0 1 0 germal ii 0 . 02 0 0 0 0 0 0 0 0 trisiloxane polyether 7 . 2 0 0 0 0 0 0 0 0 silicon 1132 0 0 . 05 0 . 05 0 . 05 0 . 05 0 . 05 0 . 05 0 . 01 0 1ex . 1 is ex . 1 of wo 07 / 028 , 517 , outside of scope of the present invention ; 2ex . 2 is ex . 2 of wo 07 / 028 , 517 , outside of scope of the present invention ; 3ex . 3 is ex . 3 of wo 07 / 028 , 517 , outside of scope of the present invention ; 4ex . 4 is ex . 4 of wo 07 / 028 , 517 , outside of scope of the present invention ; 5ex . 5 is ex . 5 of wo 07 / 028 , 517 , outside of scope of the present invention ; 6ex . 6 is ex . a of table 1 of wo 08 / 155 , 108 , outside of scope of the present invention ; 7ex . 7 is a commercial formulation of confidor od 200 g / l imidacloprid , outside of scope of the present invention , and present in the greek market in 2008 as recently produced product — while the components are known to us by analysis , they are not presented here , since for the purposes of the description only the lack of some of the components is relevant —; 8ex . 8 is falling on the scope of claims 1 , 2 and 3 of wo 07 / 028 , 517 ( namely , restricted and preferred ranges of that invention ), outside of scope of the present invention . ex . 1 , ex . 10 , ex . 13 , ex . 16 and ex . 18 were exposed to natural sunlight in opened to the air metallic infrared weight plates ( 0 . 7 cm high load ) during one week . after that period , ex . 10 showed the least decomposition of imidacloprid . ex . 1 showed 45 % more decomposition than ex . 10 . ex . 13 showed only 7 % more decomposition than ex . 10 , while ex . 16 showed increase of 23 % decomposition with regard ex . 10 . ex . 18 showed 14 % more decomposition than ex . 10 . results are expressed in relative percentages for easiness of reproduction of the assay . this shows that the formulation according the invention when containing a highly saturated vegetable oil ( methylated coconut oil ) with the uv - protector escalol ® 509 , shows the least photodegradation of imidacloprid . ex . 1 , being a vegetable oil present seems to be affected by light and oxygen , probably due to induced free radical oxidation of unsaturated fatty acids of the corn oil exposed to light ( and not protected enough with the use of bht ). it is not specially surprising that the use of escalol ® increases the stability of imidacloprid , but it is surprising at the view of prior art , since up to the date the inventors do not known any proposal to use uv - protectants for neonicotinoids in od formulations . namely , the prior art seems not to be aware of this problem . ex . 16 showed better behavior ( the tests were limited and did not allowed to extract absolute confidence intervals ) than prior art ex . 1 , being surprising that the only difference with ex . 13 ( that had only 7 % decomposition ) is the presence of the crystal film - forming selected polymers atlox ® 4912 and atlox ® lp1 . this may indicate ( as the very clear results regarding stability of the formulation and bleeding ) that indeed the neonicotinoids are effectively covered by such films even in the oily state . it is noteworthy that the oil in ex . 13 , 16 and 18 is a paraffinic oil , much less prone to photooxidation than the prior art vegetable oils . while the extent of the test is not enough detailed to discriminate in between the many factors that may have affected the results , we can only say that the rests of the components present in the invention may be as well the reason for such result , and as such we can only claim the formulation as a whole in order to be consistent with the results . it is unknown the real environment of the imidacloprid crystals in a formulation of 10 to 17 components . however , according to the invention , it is observed some effect on protection of imidacloprid when exposed to sunlight and air ( what happens after spraying the product in the field ). it is proposed that the stability of imidacloprid ( and supposedly all neonicotinoids ) follows the order in paraffinic oil & gt ; in vegetable oil . for equal coformulants , the presence of lipophilic non - ionic of the type claim 2 b could provide certain uv or visible light protection . thanks to the comparison of ex . 13 , 14 , 15 and 16 , it is clear that the use of the preferred non - ionic surfactants as claimed improve the stability of the formulation over prior art , and the use of polyvalent cationic salts are even more beneficial , showing a synergistic effect . the inventors , to the difference of the closest prior art , have taken the approach to reduce to the maximum the particle size , while having excellent physicochemical properties , of the od , in order to increase the biological activity . while the skilled in the art would surely try to look for penetrants for the cuticle , maximum after the clear teaching of previous bayer &# 39 ; s patents on neonicotinoids ods , we have taken a much more complicated approach . to reduce the particle size increases the risk in that the molecules of neonicotinoid present in the emulsion pass to the water phase and crystallize irreversible . further , the emulsification power may compromise the solubility of all the ingredients in order to achieve an homogeneous liquid in which all coformulants are dissolvent or properly dispersed in crystals . more surprisingly , the simplest way to reduce the particle size ( if there is no care on later problems on stability ) is to increase significantly the quantity of surfactants . further , for this purpose , the presence of surfactants of the type atlox 4912 would be avoided since this helps to form water in oil emulsions , introducing the risk of w / o / w double emulsions with corresponding higher particle size . it is therefore absolutely unexpected that the we got mean ( and median ) particle sizes even below 1 μm , and a percentile 90 of below 2 μm . surprisingly , the size of the crystals is not the reason of such low particle size ( obviously , the crystal size , influenced by the degree of milling , must be below of 2 - 4 μm , but prior art formulations with such crystal sizes show particle sizes rarely below a mean size of 15 μm , so the reason of our astonishing small particle size resides in the synergistic formulation ). care must be taken with this : here we refer to the value of the conventional laser diffraction particle sizers ( as mastersizer ®), where it considers both crystals over 4 μm as well , but the contribution to total size is reduced by the amount of much more particles with lower diameter . this unexpected effect is proven by : the use of atlox 4912 and atlox lp1 that would produce precisely the contrary , the non - increase of total quantity of surfactants over prior art neonicotinoids ods , the non - coalescence of very small particles and non - crystallization “ out - of - the - tiny - drop ” expected for such small particle size ( the triazole fungicides , in between many pesticides , present such “ going - out of the drop ” effect , when the oil drop is so small ). this combined with the fact that the biological effect is comparable ( or even superior ) to that achieved with the massive use of penetrating agents ( normally 30 % as shown in the examples of d1 ) as the prior art teaches , is without doubt unexpected . again , in a such complex formulations we cannot without an extensive and extreme hard testing , isolate the activity of each ingredient with full certainty of its contribution to the particle size . therefore we restrict the claimed formulations to those that share a complete surfactant system within reasonable limits . it is also proven by the inventors , whichever neonicotinoid is formulated , that the particle size won &# 39 ; t depend on the active ingredient , due to their chemical similarity . 1determined in mastersizer ™ laser diffraction equipment . note that the measurement considers both the bigger crystals of imidacloprid as well as the very small emulsified droplets . the shape of the peaks shows two maximums in all samples . data given by the equipment considers all measured values . it is astonishing the quite homogeneous and leptokurtic distribution of the formulations ex . 10 , 13 and 18 according to the present invention . the material is milled conventionally to have a final average crystal size of 75 % of the crystals below 2 μm . noteworthy , the crystals of ex . 1 were milled to the same level , and microscopic observation of ex . 7 ( confidor od ) shows a particle size below 2 - 5 μm as well ( namely , the particle size of the emulsion droplets is not — only — due to the size of the crystals ). the effects may be tested in canes 30 × 30 × 30 cm with reared approximately 500 ceratitis capitata ( wiedemann ) flies fed with protein yeast hydrolizate , males and females in ratio 1 : 1 , 20 days old and spraying a 0 . 01 % w / v emulsion of each example ( 10 ml ). after 2 hours letting all droplets to settle down and diminish aerial intoxication , 500 flies &# 39 ; lots must be transferred to the test cages . time to die all flies ( e . g ., 15 minutes ) is represented by table 4 : the time to penetrate the cuticle and kill the 500 flies of each cage is lower in ex . 13 and ex . 18 , being ex . 10 in an intermediate position in between ex . 1 and ex . 7 . on the other hand , visual inspection of spreading of imidacloprid formulations of the same examples an orange leaves showed that the examples according the invention ( 10 , 13 and 18 ) was more homogeneous and within a biggest area ( deposition with pasteur pipette 50 μl in spreaded leaves , visual inspection ). therefore , not only the penetration to insect cuticle is even improved over prior art , but also the absorption onto leaves ( at least for such insect and crop ) is enhanced according our invention . here is where the invention acquires it maximum and distinguishable features over the prior art . results on the same samples as above are ( all test according fao / who specifications for plant protection products and cipac methods ): the results show that regarding bleeding , the formulations according the present invention are superior to the state of the art formulations . further , the problem of sedimentation is solved according the present invention with approximately half of the energy with respect to comparative examples , that may suppose a crucial factor when the farmer tries to redisperse the sediment in the spray tank left filled or half - filled before continuing with the spray on the following day . while not all the results are shown here , it has been observed that formulations ex . 15 and ex . 16 present irreversible sedimentation already after two hours . moreover , consistently , redispersion was much improved when using aluminium sulfate in the formulation . the concomitant use of atlox 4912 and lp1 plus aluminium sulfate clearly have consistently shown a lower energy for redispersion . the wet sieve residue according the standardized test cipac mt 185 showed for all formulations according the invention a value below 0 . 1 %. a formulation of imidacloprid od according the invention was performed , and a capsule suspension ( cs ) formulation was performed as well , separately . emulsification of one formulation into the other was performed as final step obtaining a fully functional od - cs formulation ( that we designate as cx formulation , in the absence of still an international code for this innovative formulation type ). the procedure to create the cs formulation follow the teaching of the invention of the same authors and applicant ep 1840145 - a1 . the combination of cs formulations and od formulations follow the teaching of the invention of the same authors and applicant ep 1844553 - a1 . a suitable od + cs formulation , namely , a cx formulation is obtained with the following formula : this formula shows a good control of trips and whitefly in greenhouse . its functionality against many other pests is also ensured . example 19 was repeated but using deltamethrin instead of lambda - cyhalothrin . it shows a decrease of dermal toxicity of deltamethrin when applied for the control of fleas in cats and dogs . it is therefore expected that the control of fleas in humans is as well improved over the prior art with the use of such formulation , when diluted to the usual concentration and mixed with conventional cosmetic ingredients state of the art for hair prevention and treatment of flea infestations . replacing deltamethrin by benzoylureas ( as lufenuron , proven as effective ovicide in casaña - giner et al ., j . econ . entomol . ( 1999 ) vol . 92 ( 2 ), pp . 303 - 308 ), would increase notably the antiflea effect by virtue of long lasting biological effect added to the controlled release of microcapsules .
selective insect neonicotinoids is a class of pesticide active ingredients that share some characteristics in their chemical structures and bind to the nachr acetylcholine receptors . formulation of such compounds in oil suspension or oil dispersion is challenging due to their electrostatic interactions of the heteroatoms in oily media , that lead to irreversible flocculation or diminished homogeneicity and bleeding of such oil dispersions . imidacloprid , thiamethoxam , thiachloprid , nitenpyram , acetamiprid , clothianidin and dinetofuran and derivatives thereof with nachr binding ability are successfully formulated in oil suspension with the use of certain copolymeric anionic fatty - acid based dispersants , sorbitan derivatives , ionic surfactants , other non - ionic surfactants and inorganic polyvalent cationic salt dispersed in the oil . the formulations this way produced show excellent storage stability properties regarding physiochemical parameters , including stability of the neonicotinoid active ingredient , reduced bleeding , and complete redispersibility . further , they show excellent biological efficacy due to the reduced and homogeneous particle size below 2 μm when diluted — emulsified — in water .