Products
DIAFENTHIURON
Insecticide, acaricide
NOMENCLATURE
Common name diafenthiuron (BSI, draft E-ISO)
IUPAC name 1-tert-butyl-3-(2,6-di-isopropyl-4-phenoxyphenyl)thiourea
Chemical Abstracts name N-[2,6-bis(1-methylethyl)-4-phenoxyphenyl]-N'-(1,1-dimethylethyl)thiourea
CAS RN [80060-09-9] Development codes CGA
106 630 (Ciba-Geigy); CG-167
PHYSICAL CHEMISTRY
Composition Tech. is ≥95%. Mol. wt. 384.6 M.f. C23H32N2OS Form White
powder. M.p. 144.6-147.7 ºC (OECD 102) V.p. <2 ×10-3
mPa (25 ºC) (OECD 104) KOW logP = 5.76
(OECD 107) Henry <1.28 × 10-2 Pa m3
mol-1 (calc.) S.g./density 1.09 (20 ºC)
(OECD 109) Solubility In water 0.06 mg/l (25 ºC).
In ethanol 43, acetone 320, toluene 330, n-hexane 9.6, n-octanol
26 (all in g/l, 25 ºC). Stability Stable
in air and water, and to light. pKa Does not
dissociate (OECD 112)
APPLICATIONS
Biochemistry Converted by light, or in vivo, to the
corresponding carbodiimide, which is an inhibitor of mitochondrial
respiration. Mode of action Insecticide and
acaricide which kills larvae, nymphs and adults by contact and/or stomach
action; also shows some ovicidal action. See J. Drabek et al. (Recent
Adv. Chem. Insect Control II, 1990, p. 170). Uses Insecticide
and acaricide effective against phytophagous mites (Tetranychidae,
Tarsonemidae), Aleyrodidae, Aphididae and Jassidae on cotton, various
field and fruit crops, ornamentals and vegetables. Also controls some
leaf-feeding pests in cole crops (Plutella xylostella), soya beans
(Anticarsia gemmatalis) and cotton (Alabama argillacea). Applied at
300-500 g/ha. Is safe on adults of all beneficial groups (Anthocoridae,
Coccinellidae, Miridae) and on adults and immature stages of predatory
mites (Amblyseius andersoni, Typhlodromus pyri), spiders (Erigonidae,
Lycosidae), and Chrysopa carnea. Non-selective to immature stages of
Heteroptera (Anthocoridae, Miridae). Compatible with the biological
control of Aleyrodidae and mites in glasshouses. Formulation
types SC; WP.