Aphids are mainly distributed in northeast, North China, East China, Central China, and Southwest, which not only endangers corn, but also harms rice, wheat, etc., causing plants to stagnate or even seedlings. Reduced production by 15%to 30%. The following is its control measures:
First is agricultural control. Clear weeds in the fields and reduce early insect sources.
The second is chemical control. (1) Seed coat or species. Use 70%tataminone dressing agent coating, or mix with 10%imidacloprid wettable powder, which has a good effect on the prevention and treatment of aphids during seedlings;
(2) Use particle doses. During the corn heart lobe, before the aphids are in the hair, a 3%phosphonic particle particles are sprinkled in the heart lobe with 3%of phosphorus particles per acre, or 300 to 500 grams per mu with 15%poisoned rigid particles are used, 1: 30 ~ The 40 -proportion is sprinkled in the heart leaves evenly, and the corn cricket is also cured;
(3) spray prevention and control. The initial period of seedling and pumping is a key period for preventing and treating corn aphids. If aphid is found more, 10%imidacloprid wettable powder 1000 times liquid, 10%high -efficiency chloroline emulsion 2000 times liquid, 2.5%cylinterobal ester 2500 times liquid or 50 %Anti -aphid wettable powder 2000 times liquid, 25%pyrodiazine water dispersing agent 6000 times solution and other spray.