With the development of the economy and the improvement of people's living standards, people are increasingly concerned about their own health and living environment, and pollution-free green food is favored by people. Traditional chemical pesticides against plant diseases and insect pests will gradually be replaced by low-toxic, low-residue pesticides and biological control. Pesticide is mainly based on biological pesticides, pollution-free pesticides, specific pesticides, low-toxicity and low-residue pesticides. It is suitable for local conditions and flexible application of various control methods. It has been developed year by year to replace the current large-scale application of chemical pesticides. Improve the ecological system of the jujube garden, maintain the ecological balance, and gradually transition to the ecological jujube garden.
Biological pesticides generally refer to the use of biological living organisms (mycelium, hemispore crystals, insect viruses, etc.) to control pests and diseases. Compared with chemical pesticides, biological pesticides have no residue, no pollution, no pollution, and can be used exclusively. For related pests, disease species (ie targets). At present, the most widely recognized domestic and foreign applications are bacteria, antibiotics, insect hormones, entomopathogenic nematodes and insect viruses. Insect virus insecticides can cause more than 1,600 insects and mites, and there are more than 30 viral insecticides in the world.
The use of biological pesticides to control winter jujube pests currently has the following types.
1 Biological pesticides for controlling leaf-eating pests To control the scorpion moths, scorpion moths, caterpillars, yellow thorn moth, tussah, etc., the following medicines can be used:
1.1 Insect growth regulator (bionic pesticide)
The chlorfenapyr series insecticide is a new insect growth regulator, and its insecticidal action mechanism is to inhibit chitin synthesis of insect epidermis. The chlorfenapyr is mainly a stomach poison, but it can also invade the insect epidermis. The control of leaf-feeding pests has special action mechanism, high control effect, long residual effect period, low control cost, rain-resistant showering, pest resistance, resistance to plants, humans, animals, natural enemies and environmental safety.
1.1.1 Diflubenzuron No. 1 Diflubenzuron No. 1 is also known as diflubenzuron, also known as dichlorfen. It is stable in acidic and neutral media and decomposes in alkaline media. It is low in toxicity to people, animals, birds and fish. The formulation has 20% diflubenzuron suspension and 25% dichlorpyrifos wettable powder.
The main role of chlorpyrifos No. 1 is stomach poisoning and contact killing, so that when the larvae molt, a new epidermis cannot be formed, and the worm body becomes deformed and dies. It has special effects on lepidopteran pests and is also effective against a variety of pests such as coleoptera and diptera. When controlling the armyworm, yellow thorn moth, peach hawk moth, and jujube scorpion, use an effective dose of 10-15 g per acre to dilute to 2000 times liquid spray; when controlling spodoptera litura, use an effective dose of 2 to 4 g per acre, watering Dilute 1500 times the liquid spray.
The precautions for the use of Diflubenzuron No. 1 are basically the same as the use of Diflubenzuron.
1.1.2 Diflubenzuron No. 3 Diflubenzuron No. 3, also known as diurea No. 1 or chlorfenapyr, pure white crystal, stable to light and heat, easily decomposed by alkali and strong acid, at room temperature Lower storage is more stable. It is a non-toxic pesticide that is safe for natural enemies. The formulation is a 25% chlorfenapyr suspension.
Diflubenzuron No. 3 belongs to insect growth regulators, mainly due to stomach toxicity, and also causes some insect larvae to not molt and immediately die. The larvae no longer take food after taking the medicine. Generally, the disability is started 3 days after spraying, and the peak of disability is reached in about 5 days. Because the adult does not molt, the agent is not effective against adults.
Diflubenzuron No. 3 has a special effect on lepidopteran pests. When controlling pests such as big bag moth, jujube scorpion and yellow thorn moth, it can be sprayed with 25% chlorpyrifos 2000~2500 times. When using Diflubenzuron No. 3, it is effective to control the leaf miner by diluting 800-1000 times with water. There is a precipitation phenomenon of the chlorpyrifos No. 3 suspension, which should be shaken and diluted with water. The application of the larvae before the 3rd instar is highly effective; the application of the larvae at the advanced age is low, so the dosage should be appropriately increased. In addition, it should be stored in a cool place.
In order to give full play to the insecticidal effect of the chlorfenapyr and achieve the expected control effect, it is necessary to grasp three links:
1 Accurately grasp the timing of spraying. It is best to use the drug before the larva hatching to the 3rd instar of the larva, and strive to spray the drug within 1 week.
2 Accurate dispensing should ensure that the active ingredient of the diluted concentration is not reduced. The precipitate at the bottom of the vial should be thoroughly cleaned and fully diluted. It is best to open the vial and clean the precipitate.
3 spray evenly and thoughtfully because of the lack of systemicity of such agents, it is necessary to evenly spray the inside and outside of the tree during spraying.
1.2 Bacterial Pesticide-Bt Emulsion Bt emulsion is a microbial pesticide of Bacillus thuringiensis, a bacterial insecticide of Bacillus. Its main insecticidal ingredient is the parasporal crystal. The preparations are Bacillus thuringiensis wettable powder and Bt emulsion (containing 0.2% pyrethroid insecticide).
At present, Bt emulsion has become an important agent in the biological control work in China. The pathogenic mechanism of Bt emulsion is mainly 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, unresponsiveness, diarrhea, and black rings appear in the abdomen, gradually expanding to the whole body, poisoning death, and finally becoming black soft body, decaying, hanging upside down or dying in leaves and On the branches. Bt microbial agents have pathogenic and toxic effects on various lepidopteran larvae and spider mites, such as P. sinensis, P. sinensis, P. sinensis and Helicoverpa armigera, which are mainly used to control larvae of Lepidoptera pests. The period is generally 2 to 3 days earlier than the use of chemical pesticides. It has a good effect on the control of lower larvae of pests, and it works best when applied in hot weather. When using, the spray is mainly used. The concentration is 500-800 times (100-150g per acre), and the worms that are killed and blackened by Bacillus thuringiensis are collected, wrapped in gauze bags, rubbed in water, and then each 50g worm carcass lotion plus water 50 ~ 100L spray, the effect of pest control is also very good. Since the drug is a wettable powdery biological preparation, it should be stored in a dry and cool place below 25 ° C, and also to prevent exposure and moisture. It is an ideal agent for protecting the environment and ecology for people, animals, natural enemies, plants and the environment. However, to use at temperatures above 20 ° C, the optimum temperature is 27 ~ 32 ° C; the liquid is neutral (pH = 7.5), do not with alkaline pesticides, systemic organophosphorus pesticides or sterilization Mix the agents. In the use of young larvae, the spray is even and thoughtful, and it should be re-sprayed after the rain.
1.3 Plant-based pesticides 1.3.1 1% smoke? Bai-Yu oil is a multi-Chinese herbal plant emulsifiable insecticide. It has a wide spectrum of insecticides and can be quickly killed by insects that are easy to produce resistance. It has good degradation, no residual toxicity, safe use, no pollution, no pollution, and has a stimulating effect on plants. It is diluted with water to 1500-3000. Double spray.
1.3.2 Baicao No.1 (0.6% matrine? Lactone) is a plant-derived pesticide which is prepared by pulverizing, dissolving, adding auxiliaries and penetrants of various plants such as Niuxin Puzi and Bitter Bean. . The mechanism of action is based on contact, and supplemented by stomach toxicity, which promotes plants. It can be used to control all kinds of aphids and leaf-feeding pests, diluted with water to 1000~2000 times liquid spray, and the control effect is over 98%. This medicine is a new generation of plant insecticides that are low in toxicity, low in residue, and not harmful to humans and animals and the environment.
1.3.3 Hundreds of worms (1.2% smoke? ginseng emulsifiable concentrate) are plant-based pesticides. The active ingredients are nicotine and matrine, which have stomach poisoning, contact and fumigation effects on insects. It is low-toxic to humans and animals, has no pollution to the environment, and has no phytotoxicity to plants. It can be diluted with water to 800-1000 times to prevent leaf-feeding pests such as garden mites and other sucking mites, and to control lepidopteran larvae (before 3 years old) can be sprayed with 2000 times liquid.
1.3.4 Fruit and vegetable net (0.5% alfalfa emulsifiable concentrate) is a plant pesticide. The drug is high-efficiency, safe, low-toxic, low-residue, does not cause phytotoxicity to plants, and has stomach poisoning, contact killing and certain anti-feeding effects, but mainly relies on food and stomach poisoning. Dilute with water to 800 ~ 1200 times the liquid spray, can control the leafworms such as the genus, the moth, the poisonous moth, etc., the control effect can reach 98%, second only to the pyrethroid insecticide.
2 Biological pesticides for controlling sucking pests 2.1 Fungal pesticides Fungal biological pesticides are cockroaches and are a new fungal biological pesticide. The main insecticidal component of the fungus is an ester-soluble sterol compound, which has low toxicity, fast knockdown on aphids, and kills leafhoppers, does not harm beneficial insects such as grasshoppers and ladybugs, and promotes plants. Growth, leaf color and green effect. The concentration used is 200 to 300 times.
2.2 antibiotics series of pesticides 2.2.1 Qiqisu (1.8%, 0.9%) Also known as loveful, the active ingredient of this drug is avermectin. It is widely used at home and abroad. It can effectively control a large number of plant mites and other pests that are not sensitive or resistant to commonly used pesticides, such as red spiders, leaf miner moths, thorn moths, and mites. Toxic moths, hibiscus and other food leaves, sucking pests. It has stomach poisoning and contact killing effects on mites and other pests. Compared with chemical pesticides, the drug has a fast recovery rate of predatory and parasitic beneficial insects, which is conducive to ecological balance. Diluted with water to 15000 ~ 20000 times liquid can control red spider, is a high-efficiency acaricide (about 1.8% per acre of 20mL), diluted with water to 3000 ~ 5000 times liquid spray can also kill leaf pests According to the introduction, it can also kill nematodes. Therefore, it can be said that Qiqisu is a broad-spectrum and highly effective insecticide. The drug is easily decomposed in the presence of oxygen and light, and has no residue. It is beneficial to people, animals, plants, natural enemies, and the environment.
2.2.2 Liuyangmycin (10% water preparation) is an acaricide, a new type of antibiotics. The control effect of using 800 to 1000 times of liquid can be compared with the chemical pesticides such as dicofol, ketone, and gram, and the efficacy period can be as long as 15 to 30 days.
2.2.3 Huaguangmycin (2.5% powder preparation) is a new type of antibiotic acaricide. The drug does not pollute the environment, has no residue in the air and soil, and has a protective effect on beneficial insects. It is one of the better agents for protecting natural enemies and has a stimulating effect on plants. Dilute with water to 600 ~ 800 times liquid spray, 7 to 10 days for 2 times the best effect.
2.3 Plant pesticides Guardian birds (0.5% cucurbitacin alcohol) are plant-based insecticides with cucurbitacin solution as the main raw material. It has the best effect on all kinds of aphids, especially the aphids that are easy to produce resistance, and also has a certain killing effect on leaf axils, and the concentration is 800 to 1000 times. (send snow)

Post

H Shape Post,V Shape Post,Mushroom Shape Post,Rectangle Post

Anping Xinlong Wire Mesh Manufacture Co.,Ltd. , https://www.hbzhaoxuan.com