FACTORS REGULATING THE NUMBERS OF RAPE BLOSSOM WEEVIL IN THE SOUTHERN FOREST-STEPPE OF WESTERN SIBERIA
Studies were conducted in the laboratory of agriculture of Chernozem steppe of SibNIINP between 2013 and 2015, With 2011 chetyrehspalnyh in grain-fallow crop rotation inpatient experience was put rape instead of the steam fields, with alternating crops: spring rape, spring wheat, soybeans, and spring wheat. Two-factor experience includes: the system primary tillage (variant 3); chemicals (6 options). The article is devoted to the study of the use of means of chemical protection against pests in the southern forest-steppe of Western Siberia. Provides a detailed description of research methodology. In the presented results were announced specific features of experiments, indicated the structure of the rotation, described options for ongoing farming practices. Also voiced the role of canola in crop rotation, the importance of growing this crop for agriculture. The paper describes the adaptation of rapeseed to the conditions of sharply continental climate of the southern forest-steppe of Western Siberia. The article gives brief information about one of the major pests of oilseed rape population, which had damaged the crops in seasons of research. It provides a detailed description of the employed systems of fertilizers, herbicides, fungicides and insecticides, optimal application rate of active substances used in this experiment. The estimation of weather conditions over the study years. The description of the cultivated varieties, its origin, morphological features, advantages and the nature of the interaction with the means of chemical protection. The studies have identified the factors influencing the population dynamics of the rape blossom weevil at the experimental conditions. On the basis of the size of the rape blossom weevil at the end of three years proved the effectiveness of insecticides and the dependence of the spread of pests from the conditions of the season.