EFFECTS OF PESTICIDES AND THEIR COMBINATIONS ON THE YIELD OF SPRING BARLEY IN SOD-PODZOLIC SOIL WITH VARIOUS NUTRIENT SUPPLY IN PREDURALIE
The article, based on the analysis of experimental data from two years of research (2013-2014), presents information on the application of complex protection systems for fungicides, herbicides and plant growth regulators in combination with various mineral nutrition supply, which contribute to the increase of yield and resistance to diseases of fungal etiology on spring barley in Preduralie. The aim of the studies was to identify effective options for the integrated use of pesticides, their combination with various nutrient supply (NPK) and the effect on the phytosanitary state of spring barley crops, yield and grain quality. Studies were carried out to determine the optimal combination of pesticides and agrochemicals to obtain barley grain yields not less than 3.5-4 t/ha, to determine the influence of pesticides and their combination on the phytosanitary state of crops in soil with different mineral nutrition supply, to establish the influence of preparations on barley grain yields and yield structure. As a result of the studies carried out, it was found that on average in 2013-2014 the highest yield of barley was ensured by the use of pesticides with NPK60 in the form of plating with fungicide Dividend Star, CC and spraying of crops with herbicide Elant Premium, CE. At the same time, at the combination of pesticide yield of barley was 3.64 t/ha. The same version of the pesticide combination provided minimal crop losses from root rots. Root rot damage was reduced to 25.3 %, and disease propagation and development to 21.2 %. The highest biological yield is observed in variants with pre-sowing fungicide use (Dividend Star, CC) by the latest herbicide spraying (Elant-Premium, CE) and growth regulator (Albite, TPS) with NPK30 - 3.76 t/ha, which is 1.12 t/ha more than control.