captan 80% WDG 80% WP 450g/l SC 40% SC fungicide for plants top 1 manufacturer

captan 80% WDG 80% WP 450g/l SC 40% SC fungicide for plants top 1 manufacturer

NOMENCLATURE

Common name captan (BSI, E-ISO, JMAF); captane ((m) F-ISO); captab (Republic of South Africa)

IUPAC name N-(trichloromethylthio)cyclohex-4-ene-1,2-dicarboximide  

Chemical Abstracts name 3a,4,7,7a-tetrahydro-2-[(trichloromethyl)thio]-1H-isoindole-1,3(2H)-dione  

CAS RN [133-06-2]  EEC no. 205-087-0  Development codes SR 406  Official codes ENT 26 538  

PHYSICAL CHEMISTRY

Composition Tech. is 90-95% pure.  Mol. wt. 300.6  M.f. C9H8Cl3NO2S  Form Colourless crystals; (tech. is a colourless to beige amorphous solid, with a pungent odour).  M.p. 178 ; (tech., 175-178 )  V.p. <1.3 mPa (25 )  KOW logP = 2.8 (25 )  S.g./density 1.74 (26 )  Solubility In water 3.3 mg/l (25 ). In xylene 20, chloroform 70, acetone 21, cyclohexanone 23, dioxane 47, benzene 21, toluene 6.9, isopropanol 1.7, ethanol 2.9, diethyl ether 2.5 (all in g/kg, 26 ). Insoluble in petroleum oils.  Stability Hydrolysed slowly at neutral pH, rapidly in alkali. Thermal DT50 >4 y (80 ), 14.2 d (120 ).  

COMMERCIALISATION

History Fungicide reported by A. R. Kittleston (Science, 1952, 115, 84). Introduced by Standard Oil Development Co., later by Chevron Chemical Co.  Patents US 2553770; US 2553771; US 2553776  Manufacturer Agrowonderful cellphone 0086 17349771657

APPLICATIONS

Biochemistry Non-specific thiol reactant, inhibiting respiration.  Mode of action Fungicide with protective and curative action.  Uses Control of a wide range of fungal diseases, e.g. scab, black rot, botryosphaeria rot, bitter rot, bull's eye rot, botrytis rot of pome fruit; shot-hole of stone fruit; peach leaf curl; brown rots of cherries, apricots, peaches, plums, and citrus fruit; downy mildew and black rot of vines; early and late blights of potatoes and tomatoes; Alternaria blight and leaf spot of carrots; anthracnose and downy mildew of cucurbits; leaf spot diseases of ornamentals; anthracnose and leaf spot diseases of tomatoes; brown patch on turf; Botrytis spp. on many crops; etc. Used on a large number of other crops. Applied at 2-4.5 lb/a. Used as a seed treatment or root dip for control of Pythium, Phoma, Rhizoctonia spp., etc. on maize, ornamentals, vegetables, oilseed rape, and other crops. Phytotoxicity Non-phytotoxic if used as directed, but some varieties of apple (e.g. Red Delicious, Winesap) and pear (e.g. D'Anjou, Bosc) may be injured, as also may lettuce seeds and, at higher dosages, celery and tomato seeds.  Formulation types DP; DS; WG; WP; WS; SC.  Compatibility Incompatible with alkaline materials, oil sprays, TEPP, and emulsifiable concentrate formulations of parathion.  Selected products: 'Capone 480' (Ingenier Industrial); 'Captaf' (Rallis); 'Captec' (Micro Flo); 'Criptan' (Vapco); 'Dhanutan' (Dhanuka); 'Lucaptan' (Lucava); 'Merpan' (Makhteshim-Agan); mixtures: 'Bayleton CA' (+ triadimefon) ( CropScience); 'Rondo' (+ pyrifenox) ()

OTHER PRODUCTS

'Captab' (Rallis); 'Captane' (Rallis); 'Captano' (Rallis); 'Captazel' (Arvesta); 'Kaptan' (Azot); 'Maestro' (Arvesta); 'Malvin' (Arvesta); 'Mercap' (Papaeconomou); 'Orthocide' (Arvesta); 'Sepicap' (Griffin); 'Sigma' (Arvesta); 'Sorene' (BASF); 'Tomo-okishiran' (Nihon Nohyaku) mixtures: 'Agrox D-L Plus' (+ diazinon+ gamma-HCH) (Agriliance); 'Agrox Premiere' (+ diazinon+ gamma-HCH+ metalaxyl) (Agriliance); 'Alpha Raxil CA' (seed treatment, France) ( CropScience); 'Daipower' (albesilate)) (Dainippon); 'Kernel Guard' (+ diazinon+ gamma-HCH) (Trace); 'Topas C' (+ penconazole) (); 'Vitavax M DC' (+ carboxin) (Helena) Discontinued products: 'Captec' * (Griffin); 'Phytocape' * () mixtures: 'Ciluan' *; 'Murcicide' *