The nature and application of spinosad

The pure spinosad is a white or grayish white solid crystallized, with a similar slight odor of stale soil, is the mixture of 85% - 88% spinosad component A and 12% - 15% spinosad compound D. Spinosad is not soluble in water, soluble in organic solvents, such as methanol, ethanol, acetonitrile, acetone, dimethyl sulfoxide and dimethylformamide, etc. In aqueous solution, pH is 7.74, to the metal and the metal ion is relatively stable within 28 days, the commercialization product has 3 years shelf life. Spinosad in the air is less volatile.

Spinosad in the environment, through a variety of combination ways to degrade, mainly is the light degradation and microbial degradation, eventually become a component of carbon, hydrogen, oxygen, nitrogen and other natural compounds. The half-life of spinosad degraded by soil photolysis is 9 to 10 days, while the half-life of water photolysis is less than 1 day, the half-life of foliar photodegradation is 1.6 to 6 days. In the absence of light, the half-life of spinosad through aerobic soil metabolism is 9 to 17 days. In addition, the leaching property of spinosad is very low, fair use would not pose a threat to groundwater.

Spinosad is a broad-spectrum insecticide, experiments proved that spinosad can effectively control Lepidoptera, Coleoptera and Thysanoptera pests, in addition, it also have a good prevention in some of the large number of swallowed the blade pest species in Orthoptera and Diptera. Activity of spinosad for lepidopteran larvae is significantly greater than the organic phosphorus, carbamate insecticides, be equal to pyrethroid. While spinosyns having a high insecticidal activity, also exhibit low toxicity on predatory insects, to lepidopteran insects, spinosad is one of the highest selectivity compounds that has been found in insecticide. In addition, spinosad for thrips, lice, termites, and many Hymenoptera pests also have good effect.

According to the Chinese pesticide toxicity grading standards, Spinosad is a low-toxicity insecticide. With relatively low toxicity to mammals and birds, to aquatic animals are only slightly moderately toxic. In addition, the chronic toxicological tests to mammalian showed that spinosad no teratogenic, mutagenic, carcinogenic effects or neurotoxicity. The amount and toxicity of spinosad were lower than those currently used grain storage pesticides. Spinosad for many beneficial insects and beneficial organisms have high safety demarcation line, compared with predatory beetles, lacewings and mites, it with less toxic. Compared with the traditional cypermethrin, spinosad showed low insecticidal activity in some important beneficial insects, while in the prevention and control of lepidopteran pests, the activity intensity of spinosad and cypermethrin are usually comparable. Therefore, spinosad is the first choice to do the integrated pest management.

Spinosad as a biological insecticide, both have the characteristics of the security of biological pesticides and the fast-acting effect of chemical synthetic pesticides, there are 73 countries registered applications in more than 250 kinds of crops. Since 1997, the first time appear this product, spinosad was always maintaining the efficiency and safety industrial history. Currently, there are a lot of spinosad products be recommended for use in organic agriculture. Due to spinosad can effectively prevent and control major grain storage pests, as well as no environmental pollution, is considered to be the best agent in the stored grain protectants.

Source:http://www.cospcn.com