The effect of the Rostov corn bug population on the sown winter wheat varieties and the used insecticides

Winter wheat occupies the main share in structure of agricultural land Rostov region. The factor deterioration high-quality grain production this area is corn bug. Agrotechnical measures and plant protection products used cultivation have a significant impact on formation, development pest population. purpose current study was to determine effect sown winter varieties number phenotypic bug population under use or absence chemical treatments. In accordance with “Methodical recommendations registration tests insecticides, acaricides, molluscicides rodenticides agriculture” phenogenetics methods, there been conducted analysis its structure. There has established that fluctuations changes intraspecific depended varietal characteristics wheat. most were untreated sowings variety ‘Yuka’. found out insecticides different classes reduces larvae from 3 0 pcs./m2 , but at same time, transformation phenotype population, when morphotype 1 increases 13.5–23.5% 2 decreases 10.4–36.3%. greatest modification registered treated insecticide Bi-58 New, EC (400 g/l), which indicates need limit tank mixtures.