At present, the control of Plutella xylostella is mainly based on chemical control. Due to the large amount of breeding of Plutella xylostella, the generation is short, the variation is fast, and it is easy to produce drug resistance. The resistance problem of the drug is more prominent. Therefore, comprehensive measures such as agricultural control and physical control should be adopted to improve the control effect on Plutella xylostella and reduce drug resistance.
Agricultural control: rational layout of crop varieties, try to avoid continuous cropping of cruciferous vegetables, and bridge the proliferation of pests; after harvesting vegetables, timely clean up the fallen leaves, and then plowing, eliminating wintering and summer insect sources Eliminate weeds in the ditch field, reduce adult spawning sites and larvae food.
Physical control: Plutella xylostella has phototaxis. In the period of adult emergence, 1 black light lamp is set every 2/3 hectares to trap the adult insects.
Biological control: In the place where conditions permit, the natural enemy of Plutella xylostella can be released to control the damage. Among them, the number of Plutella xylostella, Plutella xylostella, and Plutella xylostella was the most obvious.
Chemical control: The larvae of Plutella xylostella are highly resistant to larvae. Therefore, attention should be paid to the prevention and treatment of pesticides: First, they should be used in the period of egg hatching until the larvae are 2 years old; second, they can only be used 1-3 times a year, and cannot be used frequently to prevent Produce resistance; the third is to use alternately with other pesticides.
The available agents are: BT (Bacillus thuringiensis) suspension 500-800 times solution, 1% avermectin series, insecticidal, insecticidal, insect mites, mites clear, 2.5% vegetable suspension suspension 1500 times solution , 5% vegetable gel suspension 1000 times solution, 0.36% Baicao No. 600-800 times solution, 15% hit 3500-4000 times solution, 5% Ruijinte suspension agent 2000-2500 times solution, 5% inhibition Taibao cream 1500-2000 times liquid, 5% card dead gram (flufenazone) emulsifiable oil 2000 times liquid, except 1500-3000 times liquid, 2.5% chlorocerein (Kung Fu) emulsifiable concentrate 3000 times liquid, Su Awei 1000-1500 times liquid Wait.
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