When is the best time to control bugs on Chinese cabbage?

At four o'clock in the afternoon, when the sun is no longer hot, those insects that hide from the sun start to come out and move, and spraying pesticides at this time will be more effective.

Choose the evening, usually at four o'clock in the afternoon, when the sun is no longer hot, and those insects that hide from the sun begin to come out to move, and spraying pesticides at this time will be more effective.

Biopesticides.

This kind of insecticide originates from the pathogenic microorganisms of pests, which is friendly to the food safety and production environment of agricultural products, and is the type of pesticide that should be preferred in all the pesticides for the prevention and control of cabbage cabbage insects, especially for the production of Chinese cabbage with high requirements for pollution-free quality. In the process of exerting their efficacy, this kind of insecticide generally needs to go through the process of host infection, expansion and reproduction, and gastric poisoning.

The biological insecticides for the control of Chinese cabbage greenworms include avermectin EC, Bacillus thuringiensis liquid, BT wettable powder, etc., which can be diluted with reference to the product packaging instructions in terms of concentration. The most efficient application period of this type of pesticide is during the hatching period of the eggs, after the agent is sprayed on the eggs, the hatched larvae are easily infected and killed, and the killing effect is better. In the adult stage, after the cabbage worm eats the leaves with biological insecticides, it can also have a killing effect through stomach toxicity.

This kind of drug can not be mixed with alkaline pesticides and fungicides, and the spraying time should avoid high temperature and strong light weather.

Let me come: If you want to prevent the problem of Chinese cabbage insects, first of all, when sowing white, the white seeds are accompanied by some white medicine, so as to avoid the problem of many insects, and you can prevent it during the growing period of Chinese cabbage. Done, thank you for your question, hope, thank you!

It is best in the early morning when the day is first bright (the so-called early bird has insects), when the insects are on the surface of the leaves, and as soon as the sun comes out, the insects lie down.

When is the best time to control bugs on Chinese cabbage? The insects on Dabai's body should be sprayed with pesticides to control cabbage insects when there is a large plate.

It depends on what kind of insect is born, and then choose the right pesticide. If it is an aphid or whitefly, it can be sprayed with 10% imidacloprid wettable powder 1000-1500 times or 10% acetamiprid 1000-1500 times for control. If it is cabbage worm and beet armyworm, you can spray cypermethrin 2000 times or cyhalothrin 3000 times for control.

The control of Chinese cabbage insect pests should take comprehensive control measures based on chemical control. Avoid continuous cropping of cruciferous vegetables and pay attention to cleaning the garden. If aphids are found to be controlled in time, spray once every 7 days, spray 2 3 times in a row, spray mainly on the back of the leaf and the heart of the leaf part when spraying, the agents that can be used are:

40% dimethoate emulsion 1000 2000 times liquid, 50% aphid mist (anti-aphid) wettable powder 2000 3000 times liquid, deltamethrin emulsifiable concentrate 3000 times liquid, 21% killing emulsifiable concentrate 4000 times liquid, 24% panacea liquid 1000 times liquid, 50% diloin emulsion 1000 1500 times liquid.

The landlord, the basic knowledge of agriculture, is to focus on prevention and treat various diseases. If there are pests and diseases, if the medicine is not appropriate, it is "terminally ill and irreversible." "The situation of Chinese cabbage is an overall reduction in production. Please refer to it!

Chinese cabbage is best eaten in autumn. Be sure to remove weeds from the ground before planting. If possible, you can repent and sprinkle some plant ash before digging. This can destroy the core and effectively avoid insect infestation.

Chinese cabbage planted in August is delicious, you can use pesticides to prevent insect pests, or regular watering, planting talks about the period of the year, we must pay attention to management, you can avoid diseases.

Every year, the cabbage planted from mid-July to mid-August of the solar calendar is the most delicious;The cabbage insect is one of the main pests that harm cabbage, and we can combine drugs to give spinal removal control.