Like other neonicotinoid insecticides and nicotine, thiamethoxam is also a nicotinic acetylcholine receptor (nAChR) agonist. Its control effect on most pests is better than or equivalent to other registered neonicotinoid insecticides. It not only has contact, stomach poisoning and systemic action, but can be quickly absorbed by the roots, stems and leaves of plants. It is transmitted to the top in the xylem, and has better safety, wider insecticidal spectrum, fast acting speed and long duration.
Thiamethoxam has the strongest systemic absorption, followed by contact activity and a certain permeability. Due to its slow metabolism in plants and soil, it has a long-term biological activity, and the soil has a shelf life of 90 days and is resistant to rain erosion. In addition to being used as a foliar spray, thiamethoxam is also used for seed and soil treatment, but it has the best effect on seed treatment, and the application of root irrigation is longer, and it can protect natural enemies more effectively. The amount of application for foliar and soil application is 10 to 200 g ai/hm2, and the amount of seed treatment is 39 to 299 g ai/100 kg (seed).
Due to the variety of application methods, thiamethoxam can not only control ground pests, but also control underground pests. Thiamethoxam is broad-spectrum and highly efficient, and can be used to control homoptera, lepidoptera, coleoptera, and lepidopteran pests, such as aphids, whiteflies, hibiscus, whitefly, rice planthoppers, thrips, and rice blasts. , long carp, American pasture blind, whitefly, lynx, Colorado potato beetle, apple flower weevil, rice weevil, yellow stripe, armor, sunflower leaf beetle, golden worm, apple moth, leaf miner, Liriomyza and nematodes. In addition, thiamethoxam can also be used in animal and public health fields to control flies and the like.
Thiamethoxam has an unmatched advantage over other insecticides, which is that it activates plant stress-tolerant proteins, making crop stems and roots more robust and allowing plants to grow robustly. Brazil's report suggests that thiamethoxam may act as a bioactivator, which can increase sugar cane production by 12%. Its trade name for sugar cane, which was marketed in Brazil in 2008, is Bioactivator.
Because thiamethoxam has a large solubility in water, it performs well under different environmental conditions, especially in a dry soil environment, and its biological activity is significantly better than that of a control (such as imidacloprid). When the soil is particularly dry, even aldicarb is less effective than thiamethoxam in the control of thrips.
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