As a biological pesticide, after five kinds of highly toxic pesticides are forbidden, avermectin showing rapid development momentum, the use amount was increasing, as a commonly used drug in agricultural production. However, due to the resistance production rate of bio-pesticides is faster than chemical pesticides, coupled with medication unscientific, pest resistance to abamectin was increasing, the use effect of avermectin was greatly reduced, its life cycle is worrying.
According to reports, avermectin is a new dual-purpose livestock antibiotics, it has high biological activity on a variety of crops and pest mites, is an excellent antibiotic insecticide, miticide, with broad-spectrum, efficient, low-residue and livestock and environmental safety features. Because of its unique mechanism of action, which can effectively control commonly used insecticide, insects and mites produced by miticide, is currently an ideal one agricultural pesticides in integrated pest management. Avermectin not only used to control agricultural pests, but also widely used to treat a variety of internal and external parasites of poultry disease, is a highly effective and safe poultry broad spectrum anthelmintic, have flooding killing activity on nematodes, insects and mites. Currently, for pesticide avermectin production strains are mostly the natural strains screened from nature, although through some mutagenic alienation, but its genes products expression levels limited by bacterial self-regulation system and toxin gene copy number, is still existing slow efficacy, spectrum insecticide relatively narrow, poor stability and other constraints.
Avermectin can be applied to vegetables, fruit, wheat, rice, cotton, tobacco and other crops' pest control, can used together with most pesticide, expand insecticidal spectrum and improve the control effect and speed. With highly toxic pesticides disabled, a large number of downstream product developing, the range of application extending, avermectin market demand will be further expanded.
Avermectin this biological pesticide has prevailed on the market more than ten years, because of its high efficiency, low toxicity, highly selective advantage, debuted on the market has been attached much attentions, developing to now has become widely accepted mainstream pesticides for farmers, has been recommended as a pollution-free pesticides by Ministry of Agriculture. However, precisely because of "favour", the prospect of avermectin overshadowed, some farmers and vendors reflected that even increasing drug concentration, it is difficult to effectively kill pests. According to reports, at the beginning of listing, the EC content of avermectin pesticide is 0.2%, while developing to this year, many abamectin manufacturers have registered 3 % EC content avermectin products. Manufacturers increasing the EC content is compelling, because the vermin is "more and more severe", the roots level is because farmers use too low medication.
Chinese farmers are accustomed to continued use a particular pesticide year after year, even how better pesticides were can not withstand continuous use. Relative to chemical pesticides, although with low toxicity, strong selectivity, but the speed of developing resistance faster than the former, this is also a fatal injury of biological pesticide. Agricultural developed country's pesticide treatment is relatively science, almost would not continuous use the same pesticide for many years, so that the pesticide product cycles is much longer.
Currently, in the area south of the Yangtze River in China, the use of avermectin effect has been greatly reduced, its pest resistance is very strong; in the northern region, pest has demonstrated resistance enhanced phenomenon. Relevant experts believe that this trend will only accelerate the eliminated speed of avermectin products.
Source:http://www.cospcn.com