At present, the common bio- insecticides on the market are mainly three types of Bacillus thuringiensis, insect virus and plant extract. What are the advantages of bio-insecticides compared with traditional insecticides? how to use?
Biological pesticides have obvious advantages:
1. Harmless to humans and animals, strong in specificity
Pest pathogens are highly selective for the host. Therefore, the microbial insecticide has the characteristics of being safe and harmless to organisms other than the target of prevention and treatment of humans and animals (non-target organisms), and there have been a large number of facts proven that the Bacillus thuringiensis preparation is completely safe for fish, birds, mammals and humans.
2, pests are not easy to produce resistance
Since the beginning of use, chemical pesticides have been continuously updated, and the resistance of pests has risen. There is no definitive evidence to date that insects are resistant to microbial pesticides. After a large number of research materials on the resistance of pests to various pathogenic microorganisms, it is considered that insecticidal microorganisms and pests
In the long-term common life process, it adapts to the pest defense system. Although the pests will have certain resistance to long-term repeated infection of microorganisms, the growth of this resistance is extremely slow, that is to say, the pests are some pathogens. Microbial immunity has remained at a very low level for many years.
3, can protect natural enemies of pests
Microbial pesticides are highly selective and can act differently on natural enemies of pests and pests. They kill pests and are harmless to natural enemies. The natural enemy's restriction on pests has been maintained, and the ecological balance has been developed in favor of natural enemies.
4, does not pollute the environment
The active ingredients contained in commonly used microbial pesticides are not toxic or pathogenic to plants, vertebrates and humans, so microbial insecticides do not pollute the environment and can be said to be an environmentally friendly biopesticide .
How is biocide used?
1. The specificity and good selectivity of biocides have determined that their insecticidal species and host range are more specific. When using it, it should be targeted and scientifically and rationally selected according to the type of pest occurrence. Insecticides such as Bacillus thuringiensis, insect viruses, etc., which are made of insect-causing microorganisms, can not only prevent lepidopteran pests such as cotton bollworm, cabbage caterpillar, bean hawk moth, and heartworm, but also prevent elephants, mites, and underground. Pests, Liriomyza sativae and other pests; some plant-derived insecticides have good control effects on rapeseed and spider mites.
2. The insecticidal mechanism of bio-insecticides is different from chemical pesticides . Generally, it must be infested by parasitism, accumulation and reproduction, and it can play a role in the effects of stomach poisoning. In the course of use, it is necessary to grasp the appropriate period of control, and choose to apply before the egg hatching period or the pests are younger. The agent can be immersed in the egg or attached to the egg shell, and the larvae die when they hatch, and can ensure that the pests die after feeding. When the pest is susceptible to disease, it will proliferate and proliferate in the body and spread for generations, which can control the damage for a long time.
3, biological insecticides have more "activity", the application of the environment and scientific methods are the key to its good control. When applying microbial insecticides such as Bacillus thuringiensis, insect viruses, etc., the temperature is lower than 18 ° C, the sun is strong, and the climate is dry and other factors will affect the efficacy. Generally, it is advisable to apply the evening or cloudy days in warm and humid weather, and it is strictly forbidden to use with fungicides and alkaline pesticides at the same time or in combination. Plant extract pesticides should not be placed for a long time, and should be used now, so as not to reduce the efficacy. When pest control is carried out, the drug should be used as large as possible to prevent the migration of pests and improve the biocontrol effect.
The introduction of bio-insecticides is here. To learn more about pesticides, please pay attention to China Pesticide Network.
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