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Beet armyworm Physical control: Adults have strong phototaxis, and can be trapped in the field by a frequency-vibration insecticidal lamp. Chemical control: The drug can be used with 15% ampoule suspension, and the concentration is 2000-3000 times. Control should be applied to the larvae incubation period and the peak of the first instar larvae. The spray should be even and thoughtful, and the front and back of the plant leaves should be fully taken. The insect is highly resistant, so pay attention to the rotation of medication. Beet armyworm is omnivorous and gluttonous, and should be evenly and thoughtfully applied when applying, focusing on the back of the leaf and the heart leaf. Beet armyworm has a haunting habit, and prevention should be carried out in the evening. In the high temperature and dry season, the control of beet armyworm should increase water consumption. î—¥
Spodoptera litura Physical control: Adults can be trapped by using frequency-vibration insecticidal lamps, sex pheromones, black lights or sweet and sour pots. Chemical control: Application should be carried out in the evening. 5% Ruijin special 1500 ~ 2000 times liquid, 10% of the suspension agent 1000 ~ 1500 times liquid, 15% hit suspending agent 5000 times liquid, 5% card dead grams 1000 ~ 1500 times liquid spray control. î—¥
Cabbage worms Biological control: Bacterial insecticides, such as Bt and Penicillium No. 6 liquid, can be used, usually 500-800 times. Chemical control: It can be controlled by 2.5% Baode 2000 times liquid and 5% Ruijinte suspension 2500 times. It can also be controlled by using 20% ​​or 25% diflubenzuron 1 or 3 suspension 500-1000 times. However, such agents have a slower effect, and usually cause the pests to die when the age of the insects changes, and should be sprayed early.
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Main pest control of summer cabbage
Plutella xylostella Physical control: Plutella xylostella has phototaxis. In the adult period, a black light is set every 10 mu to trap a large number of Plutella xylostella. Biological control: Using bacterial insecticides such as Bt, Plutella xylostella can cause a large number of disease deaths. Chemical control: currently available agents and concentrations of 25% or 30% diflubenzuron 1 or 3 500-1000 times solution, 50% diazinon emulsifiable concentrate 1500 times solution, 5% inhibition Taibao EC 2000 times solution, 5 % card gram emulsifiable concentrate 2000 times solution. Spray control should be carried out at the beginning of the occurrence, and sprayed on the back of the leaf or on the new leaf, spray once every 5 to 7 days, and spray 3 to 5 times. î—¥
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