Common Problems and Countermeasures in Wheat Aphid Control

Problem 1: Controlling too late. Some farmers do not control according to the control threshold for wheat aphids, but instead control after the wheat aphids have covered the wheat ears. This not only harms @#@245@#@, but also, because control is too late, affects the control effect.

Countermeasure: The control threshold for wheat aphids is 500 aphids per 100 ears. Fields that reach the control threshold must be treated with pesticides immediately.

Problem 2: Not updating the pesticide used. Not updating the pesticide used will cause wheat aphids to develop resistance to the pesticide used, and the control effect will be extremely poor.

Countermeasure: In the early stage of aphid occurrence, spray per mu with 3% acetamiprid emulsifiable concentrate at 2500-3000 times dilution, or in the middle and late stages of aphid occurrence use 10% imidacloprid wettable powder at 1500-2000 times dilution, or 50% pirimicarb wettable powder at 1500 times dilution for spray control. The above pesticides have a special effect on aphids and are basically harmless to the natural enemies of aphids.

Problem 3: The amount of spray liquid is too small. To save labor and effort, most farmers add the pesticide for controlling wheat aphids on 1 mu of land into 1 sprayer of water (a knapsack sprayer holds about 15 kg of water) for control. Because the wheat stand is very dense in the later stage, it is difficult for 1 sprayer of spray liquid to be evenly sprayed on all plants in the wheat field, causing aphids on plants not reached by the pesticide to continue surviving and reproducing. After a few days, the aphid population density rises again and harms the wheat once more.

Countermeasure: The amount of spray liquid per mu must not be less than 45 kg, that is, 3 sprayers of spray liquid. Make sure to spray evenly and thoroughly.