The spider aphid is an omnivorous pest that damages crops such as fruit trees, vegetables, cotton, and corn, and occurs most severely during high temperatures and droughts.
Damage characteristics Ruoqiang and plucked plucked leaves back to draw juice, so that the leaves were gray or withered yellow spots, severe leaves dry off, spider silky dust on the back of the leaves, affecting the growth, shorten the result period, resulting in reduced production. If you and your head are extremely small, it is not easy for the naked eye to see clearly.
Prevention and control methods should adopt the principle of "prevention-based, prevention-prevention, and treatment-based combination; selection-based treatment, point-to-face combination".
(1) After the harvest, remove the broken leaves and leaves, concentrate burned or buried deeply, and plow till.
(2) Pay attention to the monitoring of insect pests, and find that when a small amount of leaves are damaged, the insect leaves are burned in a timely manner. In case of high temperature or drought, timely irrigation, application of phosphorus and potassium fertilizers, promotion of plant growth, and inhibition of pest proliferation.
(3) Prevention of this insect should pay attention to reducing the amount of chemical pesticides to prevent the natural enemies of killing leafhoppers. The conditions of the release of predators, grasshoppers and other natural enemies, attention should be paid to the choice of drug-resistant natural enemies.
(4) When there are damaged plants in the field, there are 2% to 5% leaf blade emergence. When there are 2-3 leaves on each leaf, picking should be carried out to control the leafhopper in the stage of spotting. The main measure.
(5) In the case of major events, chemical control is mainly adopted. It can use 25% antimony 23 (N23) EC 500 to 600 times or 73% Ketel EC 1000 to 2000 times, 25% Comenocaine 1000 1500 times liquid, 20% chlorimethanol 2000 times liquid, 2.5% Uranus EC 3000 times or 5% Nissorange 2000 times, 20% ametane EC 1000 to 1500 times, 1.8% edin (BA-1) Emulsion antibiotic acaricidal agent 5000 times, 10% imidacloprid wettable powder l500 times, l5% carmine (broom net, Altair) EC 2500 times. About 1 time every 10 days, continuous control 2-3 times.
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