What are the control methods for wheat aphids?
Wheat aphids are one of the major pests of wheat, commonly known as oil insects, greasy insects, honey insects, etc. They can cause piercing-sucking damage to wheat, affecting wheat photosynthesis as well as nutrient absorption and conduction. After wheat heads out, they concentrate on the ears and cause damage, forming shriveled grains, reducing the 1000-grain weight and causing yield loss. They occur in wheat-growing regions all over the world. Now let us take a look at the control methods for wheat aphids!
Use natural enemies
There are many kinds of natural enemies of wheat aphids in wheat fields, mainly ladybugs, hoverflies, lacewings, spiders, aphid parasitoid wasps, etc., among which ladybugs and aphid parasitoid wasps are the most important. These natural enemy resources should be protected and utilized. When the ratio of beneficial insects to pests reaches 1:80 or the rate of mummified aphids reaches 30%, the use of natural enemies should be the main method, with no or less use of chemical pesticides, and as far as possible avoid killing natural enemies when controlling aphids. In order to fully give play to the role of natural enemies, when necessary, artificial breeding and release or assisted migration can also be used to control wheat aphid damage.
Chemical control
1. For seed treatment, 60% imidacloprid Gemeng FS and 20% Lemai seed dressing can be used to reduce the number of applications for aphid control.
2. For seedling aphids in early spring and before the end of the year, use 25% Dagongniu and spray it together with herbicides.
3. For ear aphids, use 25% Dagongniu thiamethoxam granules mixed with 5% Ruigong microemulsion or use them separately.
Agricultural control
1. Arrange crops rationally. In areas where winter and spring wheat are mixed, make them as uniform as possible. For autumn crops, use corn and millet, etc., as much as possible, and at the same time select some wheat varieties that are resistant to insects and tolerant to disease.
2. Before sowing, dress seeds with a seed coating agent plus New High Lipid Film, which can repel underground pests and diseases, isolate virus infection, not affect the germination and imbibition function, strengthen respiration intensity, and improve the seed germination rate.
3. Sow winter wheat appropriately late, carry out winter irrigation, and harrow and roll in early spring. During crop growth, fertilize and water according to needs to ensure that NPK and soil moisture match reasonably, so as to promote robust plant growth.
4. After rain, drain water in time to prevent moisture retention. At the booting stage, spray Zhuangsui Ling to strengthen the physiological functions of the crop, improve the quality of pollination and grain filling, increase the 1000-grain weight, and increase yield.