Control methods of wheat aphids

Wheat aphids are one of the main pests of wheat, commonly known as oil insects, greasy insects, honey insects, etc., which can pierce and suck wheat, affect wheat photosynthesis and nutrition absorption and transmission, and concentrate on the ear after heading to form blighted grains. The reduction of 1000-grain weight has occurred in all wheat areas all over the world. Let's take a look at the control methods of wheat aphids.

Make use of natural enemies

There are many kinds of natural enemies of wheat aphids in wheat fields, including ladybugs, aphid-eating flies, lacewings, spiders, aphid cocoon wasps and so on, among which ladybugs and aphid cocoon wasps are the most important. The resources of these natural enemies should be protected and utilized. When the benefit-to-damage ratio reaches 1:80 or the rate of frozen aphids reaches 30%, they should mainly use natural enemies, use no or less chemical pesticides, and avoid killing natural enemies when controlling aphids as far as possible. In order to give full play to the role of natural enemies, artificial reproduction and release or assisted migration can be used to control the harm of wheat aphid.

Chemical control

1. Seed treatment can be treated with 60% imidacloprid FS and 20% Le Mai to reduce the number of aphids.

2. Seedling aphids in early spring and years ago are sprayed with 25% Dagong cattle and herbicides.

3. The aphid was mixed with 25% thiazine granules and 5% Ruigong microemulsion or used alone.

Agricultural prevention and control

The main results are as follows: 1. Rational distribution of crops, winter and spring wheat mixed areas as far as possible to make it simple, autumn crops as far as possible corn and millet, etc., at the same time select some insect-resistant and disease-resistant wheat varieties.

2. Seed dressing with seed coating agent and new high-fat film before sowing can ward off underground diseases and insects, isolate virus infection, do not affect germination and swelling function, strengthen respiratory intensity and improve seed germination rate.

3. Winter wheat should be sowed late, winter irrigation should be carried out, and rake and grinding should be carried out in early spring. During the crop growth period, fertilizing and supplying water according to the demand, to ensure that NPK and soil moisture match reasonably, in order to promote the robust growth of the plant.

4. Drainage should be carried out in time after rain to prevent moisture retention. Zhuangsuiling should be sprayed at booting stage to strengthen the physiological function of crops, improve the quality of pollination and filling, increase 1000-grain weight and yield.