The harm of soybean heart borer and its control techniques

Soybean heart borer belongs to phosphoptera, small leaf moth family, alias soybean pod moth, bean pod worm, small red worm. When the larvae eat harmful beans into pods, the annual insect feeding rate is about 10%, and in severe cases, it can reach 30%, up to 80%, and affect the quality of soybeans and lower the grade. When the soybean heart borer appears in the field, and the number of moths per group is large, and the phenomenon of doubling occurs, it indicates that the adult has entered the peak period of occurrence, and the following methods should be taken immediately: first, fumigation with dichlorvos, that is, 100 ml of 80% dichlorvos EC per mu, cut sorghum or corn stalk into 20 cm long, peel at one end, and absorb enough chemicals to make a medicine stick. Insert the unsoaked end of the stick into the bean field, every 5 ridges in a row, with the distance between the rods 4mur5m. Second, we can choose pyrethroids and other chemical spray control. Spray with 25% cyanide per mu, 20% cyhalothrin EC 20 ml or 2.5% cyhalothrin water emulsion 20 ml to 30 kg water, pay attention to the effect of rainy days on the efficacy. In order to ensure the control effect, it is recommended to use mobile fogging machine spray, and prohibit omethoate, methamidophos and other high toxic agents.