Biological pesticides generally refer to the use of biological living organisms to control pests and diseases. They have the characteristics of no residue, no pollution, no pollution to the environment, and can be specifically applied to related diseases and pests. At present, the most widely recognized applications at home and abroad are bacteria, antibiotics, insect hormones, entomopathogenic nematodes and insect viruses.
Control flower leaf pests:
First, insect growth regulators. For example, the chlorfenapyr insecticide is an insect growth regulator, and its insecticidal action mechanism is to inhibit the chitin synthesis of the insect epidermis. Diflubenzuron is mainly a stomach poison, but it can also invade the epidermis of insects. It has good control effect, long duration, low cost of control, rain-resistant showering, pest resistance, and resistance to flower plants, humans and animals. .
Second, bacterial pesticide Bt emulsion. The Bt emulsion belongs to the Bacillus bacterial insecticide. Its main insecticidal ingredient is hemispore crystals. The drug has now become the main biocide for widespread use. The pathogenic mechanism of Bt emulsion is that Bt insecticidal toxin causes disease in the digestive tract of the pest to die. After eating the leaves with Bt emulsion, the leaf-feeding pests cause convulsions, stop eating, slow response, and diarrhea, while the back abdomen has a black ring and gradually expands to the whole body, eventually causing poisoning. After the pests die, they become black soft, rot, hang up or die on leaves and branches. Bt microbial agents have pathogenic and toxic effects on a variety of lepidopteran larvae and spider mites, such as the heartworm, yellow thorn moth, and scorpion scorpion, which are mainly used to control larvae of lepidopteran pests.
Third, plant pesticides, mainly including the following four. 1% smoke • Bai • oil: a variety of Chinese herbal plant emulsifiable insecticides, can also quickly kill insects that are resistant to degradation, with good degradation, no residue, safe use, pollution-free, pollution-free, etc. Stimulate growth. 0.6% matrine•lactone aqueous solution: the mechanism of action is mainly contact killing, supplemented by stomach poisoning, which promotes flower growth and can be used to control various kinds of aphids and leaf-feeding pests of flowers. 1.2% smoke • Alkali emulsifiable concentrate: It is a plant-based pesticide. The active ingredients are nicotine and matrine, which have stomach poisoning, contact killing and fumigation effects on insects. It is low-toxic to humans and animals, has no pollution to the environment, and has no phytotoxicity to flowers. 0.5% alizarin emulsifiable concentrate: a plant pesticide.
The drug is highly effective, safe, low-toxic, low-residue, and does not cause phytotoxicity to flowers. At the same time, it has stomach poisoning, contact killing and certain antifeedant effects.
Control flower sucking pests:
First, fungal pesticides, mainly mites. Quercetin is a fungal bio-pesticide . The main insecticidal ingredient is an ester-soluble sterol compound. It has low toxicity, fast knockdown on aphids, and kills leafhoppers, and does not harm grasshoppers, ladybugs and other beneficial insects. It has a growth-promoting effect on flowers.
Second, antibiotics series of pesticides, mainly have the following three. Qi Qisu: Qi Yusu, also known as Ai Fuding, the active ingredient of this drug is avermectin, which is widely used at present. It can effectively control a large number of herbaceous mites and other pests that are insensitive or resistant to common pesticides, such as spider mites, leaf miner moths, moths, scorpions, venomous moths, hibiscus, etc. Sucking flower pests. It has stomach poisoning and contact killing effects on mites and other pests. Compared with chemical pesticides, the predation and parasitic beneficial insects recover faster after using the drug, which is conducive to ecological balance. The drug is easily decomposed in the presence of oxygen and light, and has no residue, and is beneficial to humans and animals and flower plants. 10% Liuyangmycin Aqueous: A kind of acaricide, a new type of antibiotics. 2.5% huaguangmycin powder: a new type of antibiotic acaricide, which does not pollute the environment, has no residue in air and soil, and has protective effects on beneficial insects.
Third, plant-based pesticides , such as 0.5% cucurbitacin alcohol, have the best effect on all kinds of aphids, especially aphids that are prone to resistance, and also have a certain effect on spider mites.
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