the following examples serve to illustrate the preferred method for preparing the compositions of the present invention , the examples imposing no limitation on the scope of claims in the present invention . ( hereinafter , &# 34 ; parts &# 34 ; denotes &# 34 ; weight parts &# 34 ;.) 1 . 970 parts of trioxane ( 1 ) was mixed evenly with 30 parts of s -( 1 , 2 - dicarbethoxyethyl )- o , o - dimethyldithiophosphate ( hereinafter called malathion , to produce an insecticidal composition in the form of rough powders for control of insects in a paddy field . 2 . 980 parts of trioxane ( 1 ) was mixed thoroughly with 20 parts of dimethyl - 2 , 2 - dichlorovinyl phosphate ( hereinafter called ddvp ) to produce an insecticidal composition in the form of rough powders for control of musca domestica and insects on mulberry and tea trees . 3 . 950 parts of trioxane ( 1 ) was mixed evenly with 50 parts of o , o - diethyl - o -( 2 - isopropyl - 4 - methyl - pyrimidyl -( 6 ))- thiophosphate ( hereinafter called diazinon to produce an insecticidal composition in the form of rough powders for control of insects on paddy , fruit trees and vegetables . 4 . 970 parts of trioxane ( 1 ) was mixed thoroughly with 30 parts of o , o - dimethyl - o -( 3 - methyl - 4 - nitrophenyl )- thiophosphate to produce an insecticidal composition in the form of rough powders for control of insects on paddy , fruit trees and vegetables . 5 . 930 parts of trioxane ( 1 ) was mixed evenly with 70 parts of ethyl - o , o - dimethyldithiophosphorylphenylacetate to produce an insecticidal composition in the form of rough powders for control of insects on paddy , fruit trees and vegetables . 6 . 990 parts of trioxane ( 1 ) was mixed evenly with 10 parts of o , o - dimethyl - 1 - hydroxy - 2 , 2 , 2 - trichloroethyl - phosphate to produce an insecticidal composition in the form of rough powders for control of the flies , mosquitoes and cockroaches . 7 . 950 parts of trioxane ( 1 ) was mixed evenly with 50 parts of o , o - dimethyl - o -( 3 - methyl - 4 - methylthiophenyl ) thiophosphate to produce an insecticidal composition in the form of rough powders for control of insects on paddy , fruit trees and vegetables . 8 . 930 parts of trioxane ( 1 ) was mixed evenly with 70 parts of o , o - dimethyl - s - phthalimido - methyl dithiophosphate to produce an insecticidal composition in the form of rough powders for control of insects on cotton . 9 . 985 parts of trioxane ( 1 ) was mixed thoroughly with 15 parts of ethyl - o - p - nitrophenyl phenylphosphonothioate to produce an insecticidal composition in the form of rough powders for control of insects on paddy , fruit trees and vegetables . 10 . 980 parts of trioxane ( 2 ) was mixed evenly with 20 parts of 2 - sec .- butylphenyl - n - methylcarbamate to produce an insecticidal composition in the form of rough powders for control of insects on paddy , fruit trees and vegetables . 11 . 950 parts of trioxane ( 2 ) was mixed evenly with 50 parts of l - naphthyl - n - methylcarbamate to produce an insecticidal composition in the form of rough powders for control of insects on paddy , fruit trees and vegetables . 12 . 990 parts of trioxane ( 2 ) was mixed evenly with 10 parts of 2 - isopropoxyphenyl - n - methylcarbamate to produce an insecticidal composition in the form of rough powders for control of insects on paddy , fruit trees and vegetables . 13 . 980 parts of trioxane ( 2 ) was mixed evenly with 20 parts of 2 - isopropylphenyl - n - methylcarbamate to produce an insecticidal composition in the form of rough powders for control of insects on paddy , fruit trees and vegetables . 14 . 980 parts of trioxane ( 2 ) was mixed evenly with 20 parts of 3 , 4 - xylyl - n - methylcarbamate to produce an insecticidal composition in the form of rough powders for control of insects on paddy , fruit trees and vegetables . 15 . 970 parts of trioxane ( 2 ) was mixed evenly with 30 parts of m - totyl - n - methylcarbamate to produce an insecticidal composition in the form of rough powders for control of insects on paddy , fruit trees and vegetables . 16 . 980 parts of trioxane ( 2 ) was mixed evenly with 20 parts of 3 , 5 - xylyl - n - methylcarbamate to produce an insecticidal composition in the form of rough powders for control of insects on paddy , fruit trees and vegetables . 17 . 830 parts of trioxane ( 1 ) was mixed evenly with 170 parts of o , o - diisopropyl - s - benzylthiophosphate to produce a fungicidal composition in the form of pulverized powders for killing fungus on paddy , etc . 18 . 975 parts of trioxane ( 1 ) was mixed evenly with 25 parts of o - ethyl - s , s - diphenyldithiophosphate ( hereinafter called eddp ) to produce a fungicidal composition in the form of pulverized powders for killing fungus on paddy , etc . 19 . 970 parts of trioxane ( 2 ) was mixed evenly with 30 parts of o - butyl - s - ethyl - s - benzyl - phosphorodithioate to produce a fungicidal composition in the form of pulverized powders for killing fungus on paddy , etc . 20 . 996 . 6 parts of trioxane ( 2 ) was mixed evenly with 3 . 4 parts of the hydrochloric salt of kasugamycin to produce a fungicidal composition in the form of pulverized powders for killing fungus on paddy , etc . 21 . 910 parts of trioxane ( 1 ) was mixed evenly with 90 parts of 2 , 4 , 6 - trichlorophenyl - 4 &# 39 ;- nitrophenyl ether to produce a herbicidal composition in the form of pulverized powders for controlling weeds in paddy fields . 22 . 988 parts of trioxane ( 1 ) was mixed thoroughly with 12 parts of allyl - 2 - methyl - 4 - chlorophenoxy acetate ( hereinafter called mcp ) to produce a herbicidal composition in the form of pulverized powders for controlling weeds in paddy fields . 23 . 915 parts of trioxane ( 2 ) was mixed thoroughly with 70 parts of s -( 4 - chlorobenzyl )- n , n - diethyl - thiocarbamate and 15 parts of 2 - methylthio - 4 , 6 -( bis ethylamino )- 1 , 3 , 5 - triazine to produce a herbicidal composition for controlling weeds in paddy and plowed fields . 24 . 915 parts of trioxane ( 1 ) was mixed thoroughly with 85 parts of 3 - amino - 2 , 5 - dichlorobenzoic acid to produce a herbicidal composition in the form of pulverized powders for killing weeds in soybean fields . 25 . 910 parts of trioxane ( 2 ) was mixed thoroughly with 90 parts of 3 -( 3 , 4 - dichlorophenyl )- 1 , 1 - dimethylurea to produce a herbicidal composition in the form of pulverized powder for killing weeds . 26 . 915 parts of trioxane ( 2 ) was mixed thoroughly with 85 parts of 3 , 4 - dichloropropionanilide to produce a herbicidal composition in the form of pulverized powder for killing weeds in paddy fields . 27 . 910 parts of trioxane ( 1 ) was mixed thoroughly with 90 parts of s -( 4 - chlorobenzyl )- n , n - dimethyl - thiocarbamate to produce a herbicidal composition in the form of pulverized powder for killing weeds in paddy fields . paddy ( norin no . 8 ) was planted in three pots having a diameter of 12 cm . one gram of the malathon composition prepared in example 1 was sprinkled on the paddy in the first pot . one gram of powder containing 97 % of talc and 3 % of malathion was sprinkled on the paddy in the second pot . no chemical was sprinkled on the one in the third pot for use as a control . on the day that the chemical was sprinkled , the fifth day and the eighth day thereafter , 20 larvae of nephotettix bipunctatus cincticeps were released in each pot and the number of killed larvae was counted after 24 hours to determine the killing rate . the tests were carried out in a thermostatic chamber and were repeated three times . the results of the tests are as follows : ______________________________________when released killing rateafter the same fifth day eighth daysprinkling day after after______________________________________malathion + 100 90 63trioxane ( 1 ) malathion + 100 61 5talcno chemical 0 0 0 ( control ) ______________________________________ these results show that the composition consisting of malathion and trioxane ( 1 ) remains effective for a longer period of time . a mixture of trioxane ( 1 ), 30 . 0 grams , ddvp , 2 . 5 grams and diazinon , 2 . 5 grams , said three chemicals having been thoroughly mixed with each other , were formed into a tablet measuring 60 mm in diameter and 12 mm in thickness . the single tablet was hung in a 1 m 3 box at the center thereof for determining the insect - killing effect of the tablet , putting 20 musca domestica in the box in a closed state on every test - conducting day , the testing results being shown in the table below : ______________________________________ time requireddays of testing , weight for entirelystarting with of the killing muscathe setting of tablet domesticathe test - tablet ( unit : g ) ( unit : minute ) ______________________________________ 1st day 28 . 5 55 3rd day 25 . 9 60 5th day 24 . 3 6010th day 20 . 1 9020th day 12 . 5 18030th day 6 . 2 300______________________________________ a mixture of trioxane ( 2 ), 20 grams , ddvp , 3 grams and diazinon , 1 gram , the three constituents having been mixed thoroughly with each other , was formed into a tablet 60 mm in diameter and 8 mm thick . said tablet was put in to test a method quite identical with example 24 , except that the testing period this time was longer by 10 days than in the case of experimental example 3 , the results being shown in the table below : ______________________________________ time requireddays of testing weight for entirelystarting with of the killing thethe setting of tablet musca domesticathe test - tablet ( unit : g ) ( unit : minute ) ______________________________________ 1st day 22 . 0 11 60 3rd day 20 . 1 60 5th day 18 . 5 8010th day 15 . 1 10020th day 11 . 0 18030th day 7 . 5 33040th day 4 . 5 540______________________________________ paddy ( norin no . 8 ) was planted in six pots having a diameter of 12 cm . after it has put forth tillers , 1 gram of the powdery eddp composition prepared in example 18 was sprinkled on two pots . one gram of a powdery composition consisting of 97 . 5 % of talc and 2 . 5 % of eddp was sprinkled on the other two pots . no chemicals were sprinkled on the remaining two pots for use as control . the paddy in one of each pair of the pots was inoculated on the day after sprinkling with piricularia oryzae germs by spraying a suspension containing them . the paddy in the other of each pair of the pots was similarly inoculated on the fifth day after sprinkling . on the seventh day after inoculation , the area of the still - infected portions was measured and indicated in terms of percentage against the infected area of the control paddy . ______________________________________ ratio to infected area of control paddy ( in %) a b______________________________________eddp + 0 8 trioxane ( 1 ) eddp + talc 0 47no chemicals 100 100used ( control ) ______________________________________ a : when inoculated on the day after sprinkling b : when inoculated on the fifth day after sprinkling four pots having a diameter of 10 cm were filled with soil of a paddy field to the depth of 10 cm , on which 50 grains of seeds of barnyard grass ( echinochloa crusgalli , beauv ., var . edulis , honda ) were sowed . a small amount of soil was put thereon and wetted with water . one gram of pulverized powder of the mcp composition prepared in example 22 was sprinkled on the first pot . on the second pot was sprinkled , one gram of powder consisting of 12 parts of mcp and 988 parts of diatomaceous earth . on the third pot was sprinkled one gram of trioxane ( 1 ) powder only . no chemical was sprinkled on the fourth pot for use as a control . twenty days later , the extent of germination of the grass in these four pots was checked to determine the effect of herbicidal compositions . after the first check , 50 grains of the same seed were sowed on the first , second and third pots . in the case of the third pot , the grass that had sprout was removed before re - sowing . twenty days after re - sowing , it was observed how much the germination was controlled . the effect of herbicidal compositions was evaluated against the control in the fourth pot . ______________________________________ at first check at second check ( in %) ( in %) ______________________________________1st pot 0 42nd pot 0 783rd pot 100 -- 4th pot 100 100______________________________________ the above experiments show that trioxane ( 1 ) has no herbicidal effect , does no harm to plants , and remains effective for a longer period of time because of the small amount of decomposition of the herbicide compared to the conventional mcp powder . the amount of the carrier in respect to the active agricultural ingredients is not critical . the mixing ratio is essentially the same as with conventional carrier - agricultural chemical combinations and depends on the type of material employed , the purpose of use , ease of use , the safety requirements in respect to men and animals , etc . a typical agricultural composition in accordance with the present invention contains about 80 %- 99 . 8 % of a carrier .
an improvement is provided in sublimable agricultural chemical compositions in the form of rough grains , pulverized powders or tablets which comprises at least one agricultural chemical and a carrier therefor . the improvement resides in the employment as the carrier , triisopropyl - s - trioxane or tritertiary - butyl - s - trioxane .