Views: 1 Author: Site Editor Publish Time: 2021-08-27 Origin: Site
The action mode of neem extract azadirachtin is as follows: interfere with the normal behavior of insects, manifested as antifeeding, avoidance and sterilization; inhibit the growth and development of insects; poisonous effect.
The active ingredients of neem extract are similar in structure and composition to many hormones in insects. When pests ingest these neem active ingredients, their hormone balance is disrupted, the endocrine system is malfunctioning, metabolism, growth and development are disordered, and the brain and body parts are dysfunctional, resulting in loss of reproductive function, inability to reproduce offspring, and ultimately increase the population of insects. Down.
Neem extract has many anti-insect active ingredients, and the structure is different, and the anti-insect action mode of different kinds of pests is also different under the condition of different. Scientists at the China National Rice Research Institute believe that there are mainly the following:
1. Make pests feel aversion and rejection of plants
2. Prevent or reduce female worms from laying eggs
3. Obstruct the feeding and normal development of pests
4. Decrease the ability of adult insects to lay eggs and make the eggs sterile
Azadirachtin has a broad insecticidal spectrum and can be used to control various pests such as whiteflies, aphids, thrips, mealybugs and diamondback moths such as food crops, greenhouse crops, ornamental plants and lawns. Azadirachtin preparations are unstable under light and easily lose their insecticidal activity. When controlling stored-grain pests, neem oil can be mixed and mixed at the ratio of 5mL/kg grain, or neem preparations can be used to treat the sacks to prevent the pests of the genus Grain weevil and the pests of the genus Grain to prevent damage.