Avermectin/Abamectin

Abamectin is a type of sixteen-membered macrolide compound with insecticidal, acaricidal and nematicidal activities first developed by Tomo Omura of Kitasato University in Japan and Merck in the United States. Produced by fermentation. Natural abamectin contains 8 components, there are mainly 4 kinds, namely A1a, A2a, B1a and B2a, the total content of which is ≥80%; the corresponding 4 smaller proportions of homologues are A1b, A2b, B1b and B2b , Its total content is less than or equal to 20%. Commercially available abamectin pesticides are based on abamectin as the main insecticidal component (Avermectin B1a+B1b, where B1a is not less than 90%, and B1b is not more than 5%), and is calibrated by the content of B1a. Since abamectin entered my country's pesticide market in 1991, abamectin pesticides have occupied a relatively important position in my country's pest control system. Abamectin is produced by more than 10 companies in my country, and the commercially available avermectin series pesticides include avermectin, ivermectin and methylamino abamectin benzoate. The strain 7051 was isolated and screened from the soil of Jieyang, Guangdong, developed by the Shanghai Institute of Pesticides in the late 1980s in my country. It was later verified that the strain was similar to S.avermitilis Ma-8460 and had the same chemical structure as avermectin. In 1993, Beijing Agricultural University New Technology Development Corporation established a project to research and produce this medicine. Abamectin is a new type of antibiotic with novel structure and dual-use characteristics for agriculture and livestock. With the improvement of people's living standards and the call for green food, biological pesticides are very popular in the current pesticide market. Authorities predict that the 21st century will be the century of biological pesticides. According to reports, European bio-pesticide sales will rise from US$100 million in 1997 to US$169 million in 2004. Abamectin is the most popular and highly competitive new product in the current biological pesticide market.

API

Abamectin is also called Aifuding, 7051 Insecticid, Zongmiteguang, Lvcaibao, the original medicine is white or yellow-white crystalline powder, the active ingredient content is 75%～80%, the specific gravity is 1.16, and the melting point is 155～157℃. , Vapor pressure 2×10-7pa, solubility in water at 21℃ is 7.8μg/l, 100mg/ml in acetone, 20mg/ml in ethanol, 19.5mg/ml in methanol, 10mg/ml in chloroform, ring 6 mg/ml in hexane, 70 mg/ml in isopropanol, 0.5 mg/ml in kerosene, 350 mg/ml in toluene. It is not easy to decompose at room temperature, and there is no decomposition in a solution with pH 6-9 at 25°C.

The appearance of the preparation is light brown liquid, and the storage stability at room temperature is more than 2 years.

Preparation 1.8% Abamectin EC (each liter contains 18 grams of active ingredients)