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Products >> Fungicides >> Mancozeb

Mancozeb

Mancozeb 95%TC
Mancozeb 80%WP

Fungicide
FRAC M3; multi-site: alkylenebis(dithiocarbamate)

Mancozeb


Mancozeb NOMENCLATURE
Common name mancozeb (BSI, E-ISO); mancozèbe ((m) F-ISO); manzeb (JMAF)
IUPAC name manganese ethylenebis(dithiocarbamate) (polymeric) complex with zinc salt
Chemical Abstracts name [[1,2-ethanediylbis[carbamodithioato]](2-)]manganese mixture with [[1,2-ethanediylbis[carbamodithioato]](2-)]zinc
CAS RN [8018-01-7] (formerly [8065-67-6]); number also applies to other mixed manganese and zinc ethylenebis(dithiocarbamate) complexes

Mancozeb PHYSICAL CHEMISTRY
Composition The ISO definition is 'a complex of zinc and maneb containing 20% of manganese and 2.55% of zinc, the salt present being stated (for instance mancozeb chloride)'. A manufacturer gives the ratio of maneb to zinc as 1:0.091, i.e. 20% Mn and 2.2% Zn. Mol. wt. 271.2 (based on Composition) M.f. [C4H6MnN2S4]xZny Form Greyish-yellow, free flowing powder with a slight odour of hydrogen sulfide. M.p. Decomposes at 172 °C V.p. <1.33  10-2 mPa (20 °C) KOW logP = 0.26 S.g./density 1.92 Solubility In water 6.2 ppm (pH 7.5, 25 °C). Insoluble in most organic solvents; dissolves in solutions of powerful chelating agents but cannot be recovered from them. Stability Stable under normal, dry storage conditions. Slowly decomposed by heat and moisture. On hydrolysis (25 ºC), DT50 20 d (pH 5), 17 h (pH 7), 34 h (pH 9). Mancozeb a.i. is unstable and the tech. not isolated; the formulated product is produced in continuous process. F.p. 137.8 ºC (Tag open cup)

COMMERCIALISATION
History Fungicide reported in Fungic. Nematic. Tests, 1961, 17.Introduced by Rohm & Haas Co. (now Dow AgroSciences) and by E. I. du Pont de Nemours and Co. (who no longer manufacture or market it). Patents GB 996264; US 3379610; US 2974156 all to Rohm & Haas Manufacturers Agrochem; Aimco; CAC; Cerexagri; Crystal; Dow AgroSciences; Griffin; Hindustan; Indofil; United Phosphorus

Mancozeb APPLICATIONS
Biochemistry Reacts with, and inactivates the sulfhydryl groups of amino acids and enzymes of fungal cells, resulting in disruption of lipid metabolism, respiration and production of ATP. Mode of action Fungicide with protective action. Uses Control of many fungal diseases in a wide range of field crops, fruit, nuts, vegetables, ornamentals, etc. More frequent uses include control of early and late blights (Phytophthora infestans and Alternaria solani) of potatoes and tomatoes; downy mildew (Plasmopara viticola) and black rot (Guignardia bidwellii) of vines; downy mildew (Pseudoperonospora cubensis) of cucurbits; scab (Venturia inaequalis) of apple; sigatoka (Mycosphaerella spp.) of banana and melanose (Diaporthe citri) of citrus. Typical application rates are 1500-2000 g/ha. Used for foliar application or as a seed treatment. Formulation types DP; DS; OD; SC; WG; WP. Selected products: 'Dithane M-45' (Dow AgroSciences); 'Dithane' (Dow AgroSciences); 'Fore' (Dow AgroSciences); 'Manconex' (Griffin); 'Manex II' (Griffin); 'Manzate' (Griffin); 'Sancozeb' (Dow AgroSciences); 'Aimcozeb' (Aimco); 'Caiman' (Calliope); 'Crittox' (Siapa); 'Defend M 45' (Crop Health); 'Devidayal M-45' (Devidayal); 'Hilthane' (Hindustan); 'Indofil M-45' (Indofil); 'Ivory' (Calliope); 'Kifung' (Inquiport); 'Lucazeb' (Lucava); 'Mancosol' (Ingeniería Industrial); 'Mancothane' (Vapco); 'Manzeb' (Barclay); 'Micene' (Sipcam); 'Policar MZ' (Cequisa); 'Saver' (Sanonda); 'Uthane' (United Phosphorus); 'Vimancoz' (Vipesco); 'Zeb' (Nagarjuna Agrichem); mixtures: 'Electis' (+ zoxamide) (Dow AgroSciences); 'Equation Contact' (+ famoxadone) (DuPont); 'Gavel' (+ zoxamide) (Dow AgroSciences); 'Manex C-8' (+ cymoxanil) (Griffin); 'Sygan PM' (+ cymoxanil+ folpet) (Griffin); 'Syphal PM' (+ copper oxychloride+ cymoxanil+ folpet) (Griffin); 'Curtine-V' (+ cymoxanil) (Vapco); 'Duett' (+ cymoxanil) (Cequisa); 'Hawaii' (+ metalaxyl) (Rocca); 'Micexanil' (+ cymoxanil) (Sipcam); 'Mike' (+ flumorph) (Shenyang); 'Milor' (+ metalaxyl) (Rotam); 'Pulsan' (+ oxadixyl+ cymoxanil) (Syngenta); 'Roxam' (+ zoxamide) (Interfarm); 'Sandofan' (+ oxadixyl) (Syngenta); 'Tairel' (+ benalaxyl) (Sipcam); 'Talman-combi' (+ metalaxyl) (Cequisa); 'Trecatol' (+ benalaxyl) (Isagro)

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