Thiamethoxam is a neonicotinoid insecticide . Compared with the first generation of commercial nicotine insecticides (such as imidacloprid, nitenpyram, acetamiprid, etc.), the molecular structure of thiamethoxam has broadened the insecticidal spectrum due to the introduction of the chlorothiazole structure. Thereby increasing biological activity, it is known as a representative of the second generation of neonicotinoid insecticides.
As the first of the second generation of neonicotinoid insecticides, thiamethoxam quickly occupied and expanded the market with its excellent control effect, diversity of application methods and environmental friendliness. The second largest insecticide after imidacloprid is relayed for this class of insecticides. Its mechanism of action is mainly through the selective control of the nicotinic acetylcholinesterase receptor of the insect nervous system, blocking the normal conduction of the central nervous system of the insect, resulting in paralysis and death of the pest. Thiamethoxam not only has stomach toxicity, contact and systemic activity, but also has higher activity, better safety, wider insecticidal spectrum, faster action speed and longer duration. It has high activity against Coleoptera, Diptera, Lepidoptera, especially for Homoptera pests, and can effectively control various aphids, spider mites, planthoppers, whiteflies, chafer larvae, potato beetles, armor, and nematodes. Pests such as ground beetles and leaf miners and pests that are resistant to various types of chemical pesticides. It can be used for stem and leaf treatment, seed treatment, and soil treatment. Suitable crops are rice crops, beets, canola, potatoes, cotton, kidney beans, fruit trees, peanuts, sunflowers, soybeans, tobacco, and citrus. Use at the recommended dosage for crop safety.
Pesticides Network Xiaobian introduces the usage and dosage of thiamethoxam on crops:
1. Control rice planthopper: use 25% thiamethoxam water to disperse granules 1.6-3.2 grams per acre (active ingredient 0.4-0.8 grams), spray at the initial stage of nymphs, spray 30-40 liters per acre It is sprayed directly on the leaf surface and can be quickly transferred to the whole plant of rice.
2. Control apple aphids: use 25% thiamethoxam 5000 ~ 10000 times liquid or 2 to 20 ml of 25% thiamethoxam per 100 liters of water (effective concentration 25 ~ 50 mg / liter), or 5 ~ 10 grams per acre (Active ingredient 1.25 to 2.5 g) for foliar spray.
3. Prevention and control of melon white powder: use a concentration of 2500 ~ 5000 times, or 10 ~ 20 grams per acre (active ingredient 2.5 ~ 5 grams) spray.
4. Control cotton thrips: spray with 25% thiamethoxam 13 to 26 grams per acre (active ingredient 3.25 to 6.5 grams).
5. Control of pear hibiscus: spray with 25% thiamethoxam 10000 times solution or 10 ml per 100 liters of water (effective concentration 25 mg / liter), or 6 grams per acre orchard (active ingredient 1.5 grams).
6. Control citrus leaf miner: use 25% thiamethoxam 3000 ~ 4000 times liquid or 25 ~ 33 ml per 100 liters of water (effective concentration 62.5 ~ 83.3 mg / liter), or 15 grams per acre (active ingredient 3.75 grams) ) Spray.
Tips for pesticide manufacturers , when using thiamethoxam to control crop diseases and insect pests, strictly follow the above dosage to avoid excessive use of phytotoxicity.
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