Abstract
As a result of field studies conducted from 2022 to 2024, measures will be proposed to identify pests of rapeseed crops and protect rapeseed crops. The research was carried out at the Berik farm in the T. Ryskulov district of the Zhambyl region. Field experiments on the use of chemical substances and mineral fertilizers against rapeseed pests were conducted in the studied area. Among the soil-dwelling pests, rapeseed crops were affected by chewing worms and wireworms. The identified entomophages included ground beetles, road beetles, soldier beetles, and ladybugs. Ground beetles, soldier beetles, and ladybugs appeared during the budding stage. The following insecticides were tested against crucifer flea beetles: Sumi-Alpha 5% EC (esfenvalerate, 0.3 L/ha), BI-58 EC (dimethoate, 0.8 L/ha), and Achilles EC (lambda-cyhalothrin, 0.2 L/ha). All tested insecticides demonstrated high biological effectiveness. The biological characteristics of key pests and the factors reducing their population were studied. The following types of pests have been registered in rapeseed crops in the Zhambyl region: Psylliodes chrysocephala L., Eurydema omata L., Eurydema oleracea L., Colahellus sophiae Schall., Entomoscelis adonidis Pall., Phaedon cochlearial F., Ceutorchynchus assimilis Pauk., Baris chlorizans userm., Meligethes aeneus F., Perrisia brassiae Winn., Evergestis extimalis Scop.