Abamectin is a mixture of avermectins containing > 80% avermectin B1a and < 20% avermectin B1b (1). These two components, B1a and B1b have very similar biological and toxicological properties (5). The avermectins are insecticidal or anthelmintic compounds derived from the soil bacterium Streptomyces avermitilis
(2). Abamectin is a natural fermentation product of this bacterium (5). Abamectin is used to control
insect and mite pests of a range of agronomic, fruit, vegetable and ornamental crops, and it is used by homeowners for control of fire ants (5). Doses of 50 to 200 ug/kg of ivermectin, a similar member
of the avermectin family of comounds, is widely used to treat humans in the World Health Organization onchocerciasis (river blindness) program (2, 8).
Product name: abamectin 1.8%EC
Pesticide category: insecticide
Appearance (TC): White or off-white crystalline powder
Appearance (1.8%EC): pale yellow or brown viscous liquid
Brand name: Greenriver/ as per customers request.
Control of motile stages of mites, leaf miners, suckers, Colorado beetles, etc. on ornamentals,
cotton, citrus fruit, pome fruit, nut crops, vegetables, potatoes, and other crops. Application rates
are 5.6 to 28 g/ hafor mite control, 11 to 22 g/ ha for control of leaf miners. Also used for control
of fire ants.
5-O-demethylavermectin A1a (i) mixture with 5-O-demethyl-25-de(1-methylpropyl)-25-(1-methylethyl)avermectin A1a (ii)
Form Colourless to pale yellow crystals.
M.p. 161.8-169.4 °C (ATXht98140 decomp.ATXht0 )
V.p. <3.7 ´ 10-3 ATXht981131 mPaATXht0 (25 °C)
S.g./density 1.18 (22 °C)
Solubility In water 7-10 mg/l (20 ºC). In toluene 350, acetone 100, isopropanol 70, chloroform 25, ethanol 20, methanol 19.5, n-butanol 10, cyclohexane 6 (all in g/l, 21 ºC).
Stability Stable to hydrolysis in aqueous solutions at ATXht981151 pHATXht0 5, 7, and 9 (25 ºC). Sensitive to stronger acid and base. ATXht981188 U.V.ATXht0 irradiation causes conversion first to the 8,9-Z- isomer, then to unidentified decomposition products.
Mode of Action:
Insecticide and acaricide with contact and stomach action. Has limited plant systemic activity, but exhibits translaminar movement.
Birds Acute oral ATXht981113 LD50 for mallard ducks 84.6, bobwhite quail >2000 ATXht981123 mgATXht0 /ATXht981107 kgATXht0 . Fish LC50 (96 h) for rainbow trout 3.2, bluegill sunfish 9.6 mg/l
Product name: Abamectin 1.8%EC
pale yellow or brown viscous liquid
Content of a.i.
Emulsion Stability (Dilute)
Low Temperature Stability
Heat Storage Stability
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