Disinsection preferred microbial preparation

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At present, there are many kinds of microbial insecticides, and now there are mainly bacteria, fungi, and virus insecticides.

Bacterial insecticides include Bacillus thuringiensis, Helicobacter, etc. Among them, Bacillus thuringiensis (Bt) is a toxin-producing crystal toxin and is a kind of gastrotoxic insecticide. Bacillus thuringiensis has various degrees of poisoning effects on various pests, such as cotton bollworm, beet armyworm, small ground tiger and other bite pests.

Fungal insecticides are a contact biocidal insecticide. The main types currently used are: Beauveria bassiana, Verticillium and so on. Among them, Beauveria bassiana has good effects on prevention and treatment of borers and aphids. P. lilacinus can effectively control the root-knot nematode and has good control effect on soybean cyst nematode.

Viral insecticides are insects-hosted virus groups, and they are commonly used nuclear polyhedral viruses and granulosomal viruses. They mainly act on biting insects such as Spodoptera litura and Pieris rapae.

Bio-pesticides work well, and proper treatment is very important.

First, it should be used in due course. The insecticide mechanism of bio-insecticides is different from that of chemical pesticides. Generally, they must undergo infestation, accumulation, and effective stomach poisoning to play a role. At the time of application, the egg hatching period or the low-instar larvae should be used. Not only can the agent be immersed in the eggs or attached to the egg shells, but will die when the larvae hatch. It can also ensure that the pests die after eating.

Secondly, bio-pesticides have many "activities". The correctness of the application environment and methods of application are the key to their good control. When applying Su Yunjin rod insecticides, it is generally advisable to choose the application in the evening or cloudy days in warm and wet weather, and it is strictly prohibited to use with fungicides and alkaline pesticides at the same time or in combination. Should not be placed for a long time, should be with the current use, so as not to reduce efficacy.

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