Plutella xylostella physical control: Plutella xylostella phototaxis, in the adult stage, a black light set every 10 acres, can kill a large number of diamondback moth. Biological control: Bacterial insecticides such as Bt can cause a large number of deaths of diamondback moth. Chemical control: Currently available pharmaceutical agents and concentrations are 25% or 30% diflubenzuron No. 1 or No. 3 500 to 1000 times, 50% diazinone EC 1500 times, 5% Titanop EC 2000 times, 5 % stuck grams of 2000 times solution. Spray control should be carried out in the initial stage and sprayed on the back of leaves or new leaves. Spray every 5 to 7 days and spray 3 to 5 times.
Spodoptera exigua physical control: adults have a strong phototaxis, can be set in the field frequency vibration killing insecticidal lamp. Chemical control: The drug can be used as a 15% suspension solution with a concentration of 2000-3000 times. Prevention and control should be controlled in the larvae incubation period and the first instar larval peak application. The spray should be even and thoughtful, and the leaves of the plant should be full of medicine. The insect is resistant to insects, so pay attention to rotation. Spodoptera exigua has omnivorous and gluttonous nature, should be even and thoughtful when spraying, focusing on the back of the leaves and heart leaves. Beet armyworm has nocturnal habits, prevention and treatment should be carried out in the evening. High temperature and drought seasons should prevent Spodoptera exigua from increasing water consumption.
Spodoptera exigua physical control: can use frequency vibration type insecticidal lamp, sex pheromone, black light or sweet and sour pots trap adult insects. Chemical control: Application should be done in the evening. Can use 5% Rui Jin special 1500 ~ 2000 times the liquid, 10% Divided by 1000 ~ 1500 times the liquid agent, 15% of the 5000 times solution of the suspension agent, 5% stuck 1000 ~ 1500 times liquid spray control.
Biological control of cabbage caterpillars: Bacterial insecticides such as Bt and Chlorella strain No. 6 can be used, usually 500 to 800 times. Chemical control: It can be used to control 2.5% of EC 2000 times, 5% of Ruijin Special 2500 times. Can also be used 20% or 25% Diflubenzuron No. 1 or No. 3 glue suspension 500 to 1000 times liquid control. However, the effect of these agents is slow, and insects are usually killed when their larvae are changed. Therefore, they should be sprayed earlier.
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