MySheen

Problems and countermeasures in the control of wheat aphid

Published: 2024-11-22 Author: mysheen
Last Updated: 2024/11/22, Problem 1: some farmers do not control wheat aphids according to the control index of wheat aphids, but control them after the wheat aphids are full of wheat ears, which not only cause harm to wheat, but also affect the control effect. The control index of wheat aphid is 500 aphids per ear. The plots that reach the control target should be treated with medicine immediately. Problem 2: if the drugs are not renewed, the wheat aphids will become resistant to the pesticides used, and the control effect is very poor. Countermeasures per mu at the initial stage of aphid occurrence

Problem 1: Some farmers do not control wheat aphids according to the control index, but control them after the wheat aphids are full of ears, which not only causes harm to@#@245 @#@, but also affects the control effect.

The control index of wheat aphid is 500 aphids per hundred ears. The plots that reach the control index should be treated immediately.

Question 2: If the pesticide is not updated, the wheat aphid will be resistant to the pesticides used, and the control effect is very poor.

At the early stage of aphid occurrence, spray 3% acetamiprid EC 2500~3000 times per mu, or spray 10% imidacloprid WP 1500~2000 times or 50% pirimicarb WP 1500 times at the middle and late stage of aphid occurrence. The above chemicals have special effects on aphids and are basically harmless to aphids natural enemies.

Question 3: The amount of liquid medicine is too small. Most farmers add the pesticide for controlling wheat aphids in 1 mu of land to 1 sprayer water (a backpack sprayer contains about 15 kg of water) for prevention and control. Due to the large amount of seedlings in the late stage of wheat, it is difficult to spray the liquid medicine of 1 sprayer evenly on all plants in the wheat field, causing aphids to continue to survive and reproduce on the plants without medicine. After a few days, the population density of wheat aphids rises and harms wheat again.

The amount of solution per mu shall not be less than 45 kg, that is, 3 sprayers of solution. Spray evenly and thoroughly.

 
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