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Common name: fipronil (BSI, pa E-ISO)
CAS RN: [120068-37-3]
PHYSICAL CHEMISTRY
Mol. wt.: 437.2
M.f.: C12H4Cl2F6N4OS
Form: White solid.
M.p.: 200-201 ºC; (tech., 195.5-203 °C)
V.p.: 3.7 ?10-4 mPa (25 ºC)
KOW: logP = 4.0 (shake flask method)
Henry: 3.7 ?10-5 Pa m3 mol-1 (calc.)
S.g./density: 1.477-1.626 (20 °C)
Solubility In water: 1.9 (pH 5), 2.4 (pH 9), 1.9 (distilled)
(all in mg/l, 20 °C). In acetone 545.9, dichloromethane 22.3, hexane
0.028, toluene 3.0 (all in g/l, 20 °C).
Stability: Stable in water at pH 5 and 7; slowly hydrolysed
at pH 9 (DT50 c. 28 d). Stable to heat. Slowly degrades in sunlight
(c. 3% loss after 12 d continuous irradiation); rapidly photolysed
in aqueous solution (DT50 c. 0.33 d).
APPLICATIONS
Mode of action: Broad-spectrum insecticide, toxic by contact
and ingestion. Moderately systemic and, in some crops, can be used
to control insects when applied as a soil or seed treatment. Good to
excellent residual control following foliar application.
Uses: Control of multiple species of thrips on a broad range
of crops by foliar, soil or seed treatment. Control of corn
rootworm, wireworms and termites by soil treatment in maize. Control
of boll weevil and plant bugs on cotton, diamond-back moth on
crucifers, Colorado potato beetle on potatoes by foliar application.
Control of stem borers, leaf miners, planthoppers, leaf
folder/rollers and weevils in rice. Foliar application rates range
from 10-80 g/ha; soil treatment rates 100-200 g/ha.
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