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Common name pymetrozine (BSI, pa E-ISO)
IUPAC name (E)-4,5-dihydro-6-methyl-4-(3-pyridylmethyleneamino)-1,2,4-triazin-3(2H)-one
Chemical Abstracts name (E)-4,5-dihydro-6-methyl-4-[(3-pyridinylmethylene)amino]-1,2,4-triazin-3(2H)-one
CAS RN [123312-89-0]
PHYSICAL CHEMISTRY
Mol. wt. 217.2 M.f. C10H11N5O Form Colourless crystals. M.p. 217 ºC V.p. <4 ´ 10-3 mPa (25 ºC) (OECD 104) KOW logP = -0.18 (OECD 107) Henry <3.0 ´ 10-6 Pa m3 mol-1 (calc.) S.g./density 1.36 (20 ºC) Solubility In water 0.29 g/l (pH 6.5, 25 ºC). In ethanol 2.25, hexane <0.001 (both in g/l, 20 ºC). Stability Stable in air (OECD 113/DTA). Hydrolysis DT50 4.3 h (pH 1), 25 d (pH 5).
APPLICATIONS
Biochemistry Novel, unidentified biochemistry.
Mode of action Insecticide selective against Homoptera, causing them to stop feeding.
Uses Control of aphids and whitefly in vegetables, potatoes, ornamentals, cotton, deciduous and citrus fruit, tobacco, hops; both juvenile and adult stages are susceptible. Also control of planthoppers in rice. Application rates vary from 150 g/ha on potatoes to 200-300 g/ha on ornamentals, tobacco and cotton; 10-30 g/hl on vegetables, fruit and hops.