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Insecticides: avermectin, matrine, pyrethrum; Fungicides: chlorothalonil, Kelu, Fuxing; Herbicides: Shi Tian Bu, Fluorin, Cover Grass Energy.
Pesticides are chemical agents used to control pests. Including organic pesticides (organochlorine, organophosphorus, organosulfur preparations and carbamate and pyrethroids), inorganic insecticides (inorganic arsenic, inorganic fluorine, inorganic sulfur preparations), plant pesticides, mineral oil pesticides, microbial pesticides. Insecticides are the largest amount of pesticides and the most varieties of pesticides, most of which can only kill insects and cannot prevent diseases.
Insecticides play an extremely important role in increasing agricultural production and solving human food problems, but they are also the most important factors that cause pesticides to pollute the environment (such as organochlorine insecticides are chemically stable, not easy to degrade, easy to accumulate in soil and organisms), and are closely related to the reduction or even endangerment of natural enemies of pests and other beneficial organisms.
Insecticides are mainly used to control agricultural pests and urban health pests, with a long history of use, large dosage and many varieties. In the twentieth century, with the rapid development of agriculture, pesticides led to a huge increase in agricultural production. However, almost all pesticides can seriously alter ecosystems, most of them are harmful to humans, and the rest will be concentrated in the food chain.
There must be a balance between agricultural development and the environment and health. According to **, it can be divided into two categories: bio-derived pesticides and chemically synthesized pesticides.
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Herbicides: Goat, Blue Flame, Mars Herbicide, Desert Herbicide.
Insecticides: Delicious, easy to kill, new space insecticides.
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This is a paddy field of grass.
Wild grass generally grows on the ridge of paddy field, ditch, after rice transplanting, through the stolon, go deep into the rice field, compete with rice seedlings for glory and fertilizer to affect growth, resulting in yield loss, in recent years, due to the abandonment of farmland, contributed to the flood of wild grass.
Control methods: 1. 5% Han Lotian emulsifiable concentrate 900 1050ml can be used to spray the stems and leaves of the grass 3 5 leaf stage after the rice seedlings are slowed, and the rice field water is drained during spraying, and the water is irrigated 5cm for 1 2 days after application, and the water retention is 5 7 days, and the control effect of the grass is more than 95%, and at the same time, it can also prevent weeds such as rice barnyard and stolon, stolon, and triangular grass.
2. The method of two applications of 20% Shadovol water dispersible granules can be used, and the control effect on the grass is more than 85%, and it can also prevent weeds such as Triangular Grass, Wild Cigu, Zexiao, Yujiuhua, Firefly and so on.
Application before transplanting: after the end of land preparation, mix with 20% Shadovol 150g plus barnyard agent per hectare, use poisonous soil or poisonous sand method, and do not change water when transplanting; 10 15 days after transplanting, apply 20% Shadovol 150 225g per hectare, the water layer is 3 5cm when applying, use poisonous soil, poisonous fertilizer or stem and leaf spray method to apply, water retention after application for 5 8 days, if the water is insufficient, slowly replenish water, but can not drain.
Pesticide application after transplanting: 5 7 days after transplanting, mix with 20% sa dovol 150 225g per hectare and use 20% sa dovol 225g per hectare every 10 15 days, and the application method and water layer management are the same as above.
Pesticide application in direct seeding field: rehydration for 1 3 days after drying the field, mixed with 20% sardox 150 225g per hectare and barnyard agent, 20% sardox 150 225g per hectare every 10 15 days, the application method and water layer management are the same as above.
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<> pyrethroid insecticides and nicotinic insecticides can be mixed with herbicides (corn herbicides), but it is necessary to avoid corn heart leaves and avoid filling the heart of the drug solution when spraying. The mixed use of pesticides and herbicides should follow the principle of pesticide mixing, that is, there should be no adverse chemical reactions between the mixed drugs, and it should be guaranteed to be able to exert normal efficacy or increase efficiency.
1. What pesticides can be used with herbicides
1. Types of insecticides that can be mixed with herbicides.
1) Taking corn herbicides as an example, pyrethroid insecticides and nicotinic insecticides can be mixed with it, but the heart leaves of corn should be avoided when spraying to prevent the filling of the solution.
2) The alkynyl herbicide can be mixed with most insecticides, and the effect of weeding and insecticide is faster after application, while most of the other herbicides generally cannot be mixed with insecticides, such as zooxazone herbicides can not be mixed with emulsifiable insecticides (or other agents), otherwise pesticide damage may occur.
2. The principle of pesticide mixture.
1) Adverse chemical reactions (such as alkaline hydrolysis, acid hydrolysis, hydrolysis, redox reactions, etc.) should not occur between the mixed drugs, and it should be guaranteed to be able to exert normal efficacy or increase efficiency, and at the same time, it should not affect the physical properties of the drugs, such as emulsification, suspension rate reduction, etc.
2) After different drugs are mixed, they cannot cause pesticide damage to crops.
3) The toxicity of the drug should not be increased after mixing, and it is necessary to ensure the safety of humans and animals.
4) If the mixture can neither increase efficiency nor expand the scope of control, there is no need for mixing.
5) When mixing, it is necessary to pay attention to the antagonistic effect between pesticides to ensure the mixing effect, for example, when mixing with Nayujing and Bendasone, the control effect of gramineous weeds will be reduced due to the antagonistic effect.
2. Which poison is insecticide or herbicide
1. Toxicity of pesticides and herbicides.
Taking low-toxicity insecticides and low-toxicity herbicides as examples, herbicides are generally relatively toxic, such as paraquat, which can be quickly lethal to plants and highly toxic to humans, and there is no specific antidote.
2. How to use herbicides.
1) For annual gramineous weeds, mix 500-700 ml of 10% glyphosate with 30-40 kg of water per mu, and then spray it.
2) For annual broad-leaved weeds, 750-1000 ml of 10% glyphosate mixed with 30-40 kg of water per mu, and then sprayed.
3) Perennial malignant weeds, 1250-1500 ml of 10% glyphosate mixed with water 30-40 kg per mu, and then sprayed.
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The principle of pesticide mixing: no adverse chemical reactions (such as hydrolysis, alkaline hydrolysis, acidolysis or redox reactions) occur between mixed varieties, to ensure normal efficacy or synergistic, and to do not affect the physical properties of pesticides (such as emulsification, suspension rate reduction, etc.).
For example, most organophosphate insecticides cannot be mixed with Bordeaux liquid, stone sulfur mixture, etc.; The powder cannot be mixed with wettable powder and soluble powder.
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It can be classified according to the specific ingredients. It contains both inorganic compounds and organic compounds. It is possible to mix and use together, but it is important to pay attention to the principle of mixing.
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There are chemical, tutoring, and contact killing, and in general, herbicides and insecticides are not used together.
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It is a red thistle, which can be used with a herbicide that kills dicots, such as glyphosate, plus laundry detergent.
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The red thistle seems to be weak, but it can become the "overlord" of a territory madly, in addition to the amazing "seed-bearing" ability mentioned above, but also because of its "biological toxicity". Hao Jianhua said that not only are ordinary herbicides like alachlor ineffective against Shenghongthistle, but also Shenghongthistle itself can release "biological pesticides" - the phytoxins it can secrete are phenolic substances. These phenolic substances can enter the soil and kill crops such as wheat, peas, lettuce, as well as other plants, making them the dominant species in a territory.
Chlorachlor, steady killing, napujing, herbicidal ether, amitophos.
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If you want to kill weeds, you need to use herbicides that kill monocots.
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Plants like Asteraceae are not pigs, hyssop, Shimoda chrysanthemums or something.
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It's too small to see clearly! ~~
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What are the most commonly used herbicides in sugarcane growing areas such as Guangxi and Guangdong?
Answer: Glyphosate, paraquat, oxymetrinet, 2-methyl-4-chloride, diuron, etc.
What are the commonly used herbicides for corn, soybeans and other crops in the Northeast?
Answer: corn field: pre-seedling, acetochlor + atrazine, metolachlor + atrazine after seedlings, nicosulfuron + atrazine, drop-butamine + octamidyl bromobenzonitrile. Soybean: pre-seedling, acetochlor + 2,4-d butyl ester, post-seedling quinoxalin + pyroxamine + sulfafen, etc.
What are the varieties of herbicides used in Sichuan?
Answer: Sichuan has rice, corn, rape, can use benzyl A, benzyl B and other products, rape can use quinoxalin, high cover, olethotholate, grass to kill the spirit, Qiaochang's oil power, oil treasure and so on.
The principle of pesticide mixing: no adverse chemical reactions (such as hydrolysis, alkaline hydrolysis, acidolysis or redox reactions) occur between mixed varieties, to ensure normal efficacy or synergistic, and to do not affect the physical properties of pesticides (such as emulsification, suspension rate reduction, etc.). >>>More
1 Mode of action of pesticides.
The most commonly used modes of action of pesticides are contact killing, stomach toxicity, systemic absorption, fumigation, food refusal, avoidance and growth regulation. Contact killing is the most important mode of action of insecticides currently used, which can kill all kinds of pests and mites of mouthparts. Gastric toxicity can generally only control chewing mouthpart pests, such as lepidopteran larvae, Coleopteran adults, and Orthoptera. >>>More
1.Corn herbicides can be mixed with pyrethroid insecticides (such as emamectin, benzoate, cypermethrin, etc.). ) and commonly used nicotinoid insecticides (such as imidacloprid, acetamiprid, etc.). , but not mixed with organophosphate insecticides (such as chlorpyrifos, phosphine, dichlorvos, etc.). ). >>>More
How are pesticides classified by chemical structure?
Homemade herbicide formula ratio:
1. Formula 1. >>>More