CEPHUS PYGMAEUS INFLUENCE FOR WINTER WHEAT GRAIN DAMAGED BY HAPLOTHRIPS TRITICI AND EURYGASTER INTEGRICEPS, DEPENDING ON YEAR CLIMATE, VARIETY AND SURFACE MEZOFORMS IN THE SAMARA REGION FORESTS

The purpose of research is the reduction of wheat grain damage and bugs. Investigations were carried out by mezoform of the relief at the surfase profile length of about 8 km in soft winter wheat crops four grades: without a trace – Volga 86, Kinelsky 8, spinous – Kinel 4 and Konstantinovskaya. The damage of the grain of wheat thrips and chinch in the ears of the sawfly larvae from damaged and undamaged stems established under a microscope MBS-10 as described in V. I. Tanskiy. According to the degree of deformation grooves grain wheat thrips larvae distinguished three degrees of damage: mild, moderate and severe. From one field for the analysis was taken 200 grains damaged and non-damaged shoots. Grain damage thrips larvae and integricepsur chinch were led away from dry to wet years. In the wet 2011 damage of wheat thrips ears on stalks, damaged and undamaged sawfly did not differ significantly, but on average in 2012 and moistened arid 2014 it increased 11-31%. The damage of wheat grain chinch shoots with damaged sawfly in 2011 and 2012. It was significantly higher than with intact in arid 2014 it was lower. Grain damage thrips decreased by 42-47% on top of the slope to 26-30% - on the bottom. The smallest grain damage thrips was in grade Povolzskay 86. All varieties of the number of damaged grain pests was higher in the ear on the sawfly larvae intact stems.

winter, wheat, plain, pygmaeus, cephus eurygaster, thrips, integricepsur