DEVELOPMENT AND SPREAD OF THE DIAMONDBACK MOTH IN RAPESEED CROPS OF АKMOLA REGION

Abstract

This article provides results of research of development and spread of the diamondback moth in rapeseed crops in «A.I. Barayev scientific – industrial center of grain farming» LLC. As a result of phenological observations in «A.I. Barayev scientific – industrial center of grain farming» LLC the diamondback moth developed in three generations during the vegetation period of 2021 and in three generations - during the vegetation period of 2022. Damage is inflicted during the larvae stage of development of the diamondback moth in the form of caterpillar. Damage by caterpillars of the diamondback moth is observed in rapeseed crops from the stage of development of leaves and branches till the stage of ripening. As rapeseed grows and develops the extend of damage inflicted by caterpillars of the diamondback moth varies, but no low periods were observed and damage varies within 85-93%. According to the plan of research, crops were applied two times with chemical agents – insecticides. First time crops at the phase of 4 leaves were sprayed with mix for insects including the diamondback moth and containing Zarya microfertilizer (imidaclopride, 150 grams per liter + lambda-cygalotrine, 50 grams per liter) + Gros Phorphito LNRK (nitrogen + phosphorus P2O5 + potassium K2O + free amino acids), application rate - 0,5+2,0 grams per liter; second time – at the time of budding sprayed with mix for insects including the diamondback moth, - Latrin (lambda-cygalotrine, 50 grams per liter), application rate - 0,15 grams per liter.