What are the control methods for flower leaf-eating pests?
The occurrence of flower leaf-eating pests will seriously damage the ornamental value of flowers and affect flower growth. Flowers affected by pests should be controlled in a timely manner, so what should be done?
Insect growth regulators. For example, the diflubenzuron series of insecticides are insect growth regulators. Their insecticidal mechanism is to inhibit chitin synthesis in the insect epidermis. The diflubenzuron class are mainly stomach poisons, but they can also penetrate the insect epidermis to take effect. They have good control results, a long residual period, low control cost, resistance to rain washing, and pests are not prone to developing resistance. They are safe for flower plants, humans and livestock, and the environment.
Bacterial pesticide Bt emulsion. Bt emulsion belongs to the Bacillus bacterial insecticides. Its main insecticidal component is the parasporal crystal. This pesticide has now become a widely used major biological insecticide. The pathogenic mechanism of Bt emulsion is that the Bt insecticidal toxin causes lesions in the pest's digestive tract, leading to death. It causes pests to become paralyzed, stop feeding, respond slowly, and develop diarrhea, after which a black ring appears on the abdomen and gradually spreads to the whole body, eventually causing death by poisoning. After death, the pests become black soft bodies, rot, hang upside down, or die on leaves and branches. Bt preparations have pathogenic and toxic effects on many Lepidoptera larvae and leafhoppers, and are mainly used to control the larvae of Lepidoptera pests.
Botanical pesticides, mainly including the following 4 types. 1% nicotine·matrine·oil: a multi-component Chinese herbal botanical emulsifiable concentrate insecticide. It can also quickly kill insects that are prone to resistance, and has characteristics such as good degradation, no residue, safe use, no public hazard, and no pollution. It also stimulates flower growth. 0.6% matrine·lactone aqueous solution: its mechanism of action is mainly contact poisoning, supplemented by stomach poisoning. It promotes flower growth and can be used to control various aphids and leaf-eating pests on flowers. 1.2% nicotine·matrine emulsifiable concentrate: belongs to botanical pesticides. Its active ingredients are nicotine and matrine, and it has stomach poisoning, contact poisoning, and fumigant effects on insects. It is low in toxicity to humans and livestock, causes no environmental pollution, and causes no phytotoxicity to flowers. 0.5% toosendanin emulsifiable concentrate: belongs to botanical pesticides.
This pesticide is efficient, safe, low in toxicity, and low in residue, and will not cause phytotoxicity to flowers. It also has stomach poisoning, contact poisoning, and a certain antifeedant effect.