Principles For The Application Of Biological Insecticide

1, Symptomatic treatment. The specificity and good selectivity of biocides have determined that their insecticidal species and host range are more specific. 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, and heartworm. It can also prevent pests such as weevil, Liriomyza sativae. Therefore, when using biocides, they should be selected according to the type of pests.

2. Proper control. The insecticidal mechanism of biological insecticides is different from chemical pesticides, and it usually takes effect through infestation, parasitization, accumulation and stomach toxicity. At the time of application, it is necessary to grasp the egg hatching period or the larvae for the younger age. It can not only immerse the insects in the eggs or attach them to the egg shells, but also kills the larvae when they hatch, and can ensure that the pests die after feeding.

3. Scientific application. Bio-insecticides are mostly "active", and the application environment and scientific use are the key to their good control. For example, when applying microbial insecticides such as Bacillus thuringiensis and insect viruses, it is generally advisable to apply the evening or cloudy days in warm and humid weather, and it is strictly prohibited to use the fungicides or alkaline pesticides at the same time or in combination. Plant extract liquid insecticide, should not be placed for a long time, should be used now, so as not to reduce the efficacy.