Technical Bulletin #02: Agrochemical General Information Sheet - Abamectin

It is used to control mites, sucking insects, and leaf miners on a wide range of vegetables, fruits, beans, and nut crops. Abamectin has limited plant systemic activity and is taken in by the plant through its roots, stems, or leaves. When a pest ingests the chemical as it feeds on the plant, it attacks the nerve system, causing paralysis within hours. Maximum mortality occurs in three to four days after application. Abamectin is registered in Cambodia under various trade names, including Abatin, Intacke, Silsau 1.8EC, and Vicare 36 EC. It is available in emulsifiable concentrate (EC) formulation types. The chemical family to which abamectin belongs is avermectin. Abamectin is moderately toxic to humans and can cause moderate eye irritation. However, it is non-toxic to birds and mammals, but highly toxic to fish and bees. Resistance to abamectin can develop if it is used repeatedly in the same crop cycle. To prevent this, it is recommended to apply the chemical no more than twice in one crop cycle and to alternate it with miticides from a different mode of action group. Abamectin is not absorbed by the skin or body and is rapidly eliminated from the body. Groundwater contamination is not a threat, but surface water contamination can occur due to spray drift. The recommended application rates for abamectin vary depending on the crop and target insect. For example, on rice, the recommended rate is 20-25 mL per tank of 16 L, applied at a rate of 2-2.5 tanks per 1,000 square meters. On orange, pepper, and tomato, the recommended rate is for red spider, thrip, and leafminer control. Pre-harvest intervals of seven days are recommended for all crops. To minimize risks associated with abamectin use, applicators should wear protective clothing, mix and clean chemicals in designated areas, and avoid applying the chemical near open water sources or when bees are working plants. It is also recommended to rotate chemicals used and correctly implement other Integrated Pest Management practices.