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PENCYCURON

 

Fungicide： phenylurea fungicide



NOMENCLATURE
Common name pencycuron (BSI, draft E-ISO, (m) draft F-ISO)
IUPAC name 1-(4-chlorobenzyl)-1-cyclopentyl-3-phenylurea 
Chemical Abstracts name N-[(4-chlorophenyl)methyl]-N-cyclopentyl-N'-phenylurea 
CAS RN [66063-05-6]  Development codes NTN 19 701 (Bayer)

PHYSICAL CHEMISTRY
Mol. wt. 328.8  M.f. C19H21ClN2O  Form Colourless, odourless crystals.  M.p. 128 °C (modification A); 132 °C (modification B)  V.p. 5 × 10-7 mPa (20 ºC, extrapolated)  KOW logP = 4.68 (20 °C)  Henry 5 × 10-7 Pa m3 mol-1 (20 °C)  S.g./density 1.22 (20 °C)  Solubility In water 0.3 mg/l (20 ºC). In dichloromethane 270, toluene 20, n-hexane 0.12 (all in g/l, 20 ºC).  Stability On hydrolysis (25 ºC), DT50 280 d (pH 4), 22 y (pH 7), 17 y (pH 9). Photodegrades in water and on soil surfaces. 

APPLICATIONS
Mode of action Non-systemic fungicide with protective action.  Uses Can be used as a foliar spray and dust application, a seed treatment, or by soil incorporation. Control of diseases caused by Rhizoctonia solani and Pellicularia spp. in potatoes (15-25 g/100 kg seed, 3-5 kg/ha in seed furrow), rice (150-250 g/ha foliar), cotton (45-75 g/100 kg seed), sugar beet (500 g/ha foliar), vegetables (1250-1500 g/ha drench and incorporation in field at transplanting), ornamentals and turf. In particular, control of black scurf of potatoes, sheath blight of rice, and damping-off of ornamentals.  Formulation types DP; DS; FS; SC; WP.  Compatibility Compatible with a number of other fungicides and insecticides, e.g. edifenphos, captan, thiram, fenthion.