Overview
Emamectin Benzoate is a semi-synthetic derivative of avermectin B1, developed as a highly effective insecticide for agricultural use. It belongs to the macrocyclic lactone class of compounds and exhibits exceptional activity against lepidopteran pests. The benzoate salt formulation enhances its stability and solubility properties. The compound works by activating glutamate-gated chloride channels in insect nervous systems, causing paralysis and death. Its unique mode of action makes it valuable in resistance management programs, particularly where pyrethroid or organophosphate resistance has developed.
Physical and Chemical Properties
Emamectin Benzoate appears as a white to pale yellow crystalline powder with low volatility. It demonstrates moderate stability under normal storage conditions but degrades when exposed to strong acids, bases, or UV light. The compound's low water solubility (3-7 mg/L) contributes to its residual activity on plant surfaces. Its partition coefficient (log Pow ≈ 5) indicates high lipophilicity, which facilitates penetration through insect cuticles. The benzoate salt form improves formulation stability compared to the free base, making it suitable for various agricultural preparations including emulsifiable concentrates and water-dispersible granules.
Main Applications
Emamectin Benzoate is primarily used against lepidopteran pests in cotton, vegetables, fruits, and tea crops. It effectively controls diamondback moth, beet armyworm, and cotton bollworm at application rates typically between 5-25 g active ingredient per hectare. The compound is also registered for use in forestry against pine processionary moth and in aquaculture to control sea lice. In integrated pest management systems, it serves as a rotation partner with other insecticide classes due to its distinct mode of action. Some formulations combine emamectin benzoate with other active ingredients to broaden the spectrum of control or enhance residual activity.
Safety and Storage
While Emamectin Benzoate has low acute mammalian toxicity (WHO Class III), proper handling precautions are essential. Operators should wear protective clothing, gloves, and eye protection during mixing and application. The compound is highly toxic to aquatic organisms and must not contaminate water bodies. Storage requires dry conditions below 30°C in original, tightly sealed containers. Bulk quantities should be kept on pallets in well-ventilated areas separate from foodstuffs. Shelf life is typically 2-3 years when stored properly. Spills should be contained with absorbent material and disposed of according to local regulations.
B2B Procurement Guide
When sourcing Emamectin Benzoate, verify the supplier's Certificate of Analysis showing purity (typically 90-95%) and impurity profile. Technical material should meet FAO specifications if intended for formulation. Check regulatory status in target markets as approvals vary by country and crop. For large agricultural purchasers, consider pre-season contracts to ensure supply. Quality indicators include consistent crystalline appearance, low moisture content (<1%), and proper packaging (usually 25kg fiber drums with polyethylene liners). Request samples for bioassay testing against target pests before major purchases.
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