At present, it is the high incidence of Plutella xylostella. Plutella xylostella has the characteristics of generations of generations, strong reproductive ability, and a wide range of hosts. It has become the heart of agricultural friends. In addition, it is extremely resistant to drug resistance, so it is also difficult to prevent. So how do you do the right thing?
Plutella xylensis control to understand this knowledge
1 Plutella xylostella usually lays eggs on the back of the leaf and hatches the larvae to eat the mesophyll. The feeding of 3-4 instar larvae can cause irregular translucent plaques to be formed in the leaves of the affected vegetables. In severe cases, the leaves of the vegetables are "fishnet"-like. It mainly harms cabbage, green vegetables, cauliflower and Chinese cabbage, especially cabbage.
2 Plutella xylostella is fast-growing, and can be used to change crops in multiple generations a year. And the more offspring of Plutella xylostella, the greater the resistance and the greater the harm.
3 In the north, the winter is over, and in the south, the insects can be wintered at all stages. The more southward, the more algebras occur, and even up to 20 generations in southern China. Therefore, the more southward, the earlier the pests occur, and the more difficult it is to prevent and control.
Prevention and treatment should be integrated with physical plus chemistry
1 Select resistant varieties, select varieties with better resistance to insects on the basis of yield and quality, and lay the foundation for pest control.
2 Avoid heavy mistakes and avoid continuous cropping. Scientifically planted, rationally arranged, and the soil should be deep.
3 Reasonable combination of fertilizer and water management, appropriate selection of organic water soluble fertilizer to enhance the plant's resistance.
4 found that the diamondback moth, to prevent it in time to avoid its continued harm. After harvesting, the residual plants are cleaned up in time and taken away from the field or buried deep to avoid providing space for P. xylostella.
5 can use the biological insecticidal method to properly introduce the natural enemies of Plutella xylostella, Chinese grasshopper, grass black spider, etc., or introduce the Plutella xylostella, the semi-closed tailed wasp, the Plutella xylostella Waiting for parasitization of the eggs of Plutella xylostella.
6 chemical control should be selected in the 1-2 age insect segment. Use insects or 0.3% azadirachtin for drug control. Insect full-scale is a low-toxic/three-origin formula insecticide that replaces conventional pesticides, and has excellent effects on pests such as Plutella xylostella. The drug contains FT additives, which can make the drug more permeable and more resistant to rain. 0.3% azadirachtin is a new type of pesticide that is harmless and suitable for food production. As a biological insecticide, it acts to inhibit the nutrient absorption of pests through the action of digestive enzymes in the midgut, thereby achieving the effect of preventing pest damage.
Mints Or Compressed Mints Or Drop
Mints Or Compressed Mints Or Drop,Compressed Mints,Functional Power Gum,Functional Slimming Mints
Soar Biotech Co.,Ltd , https://www.xylitgum.com