Hangzhou Leaflife Chemical Co., Ltd.

Products

 

TEBUCONAZOLE

 

Fungicide: triazole

NOMENCLATURE
Common name
tebuconazole (BSI, draft E-ISO)
IUPAC name (RS)-1-p-chlorophenyl-4,4-dimethyl-3-(1H-1,2,4-triazol-1-ylmethyl)pentan-3-ol 
Chemical Abstracts name (-a-[2-(4-chlorophenyl)ethyl]-a-(1,1-dimethylethyl)-1H-1,2,4-triazole-1-ethanol 
Other names fenetrazole*; terbuconazole*; terbutrazole*; ethyltrianol*  CAS RN [107534-96-3]  EEC no. ELINCS: 403-640-2  Development codes HWG 1608 (Bayer)

PHYSICAL CHEMISTRY
Composition Racemate.  Mol. wt. 307.8  M.f. C16H22ClN3O  Form Colourless crystals; (tech., colourless to light brown powder).  M.p. 105 ºC  V.p. 1.7 × 10-3 mPa (20 ºC) (OECD 104)  KOW logP = 3.7 (20 °C)  Henry 1 × 10-5 Pa m3 mol-1 (20 °C)  S.g./density 1.25 (26 °C)  Solubility In water 36 mg/l (pH 5-9, 20 ºC). In dichloromethane >200, isopropanol, toluene 50-100, hexane <0.1 (all in g/l, 20 ºC).  Stability Stable to elevated temperatures, and to photolysis and hydrolysis in pure water, under sterile conditions; hydrolysis DT50 >1 y (pH 4-9, 22 °C). See also Environmental Fate.

APPLICATIONS
Biochemistry Steroid demethylation (ergosterol biosynthesis) inhibitor.  Mode of action Systemic fungicide with protective, curative, and eradicant action. Rapidly absorbed into the vegetative parts of the plant, with translocation principally acropetally.  Uses As a seed dressing, tebuconazole is effective against various smut and bunt diseases of cereals such as Tilletia spp., Ustilago spp., and Urocystis spp., also against Septoria nodorum (seed-borne), at 1-3 g/dt seed; and Sphacelotheca reiliana in maize, at 7.5 g/dt seed. As a spray, tebuconazole controls numerous pathogens in various crops including: rust species (Puccinia spp.) at 125-250 g/ha, powdery mildew (Erysiphe graminis) at 200-250 g/ha, scald (Rhynchosporium secalis) at 200-312 g/ha, Septoria spp. at 200-250 g/ha, Pyrenophora spp. at 200-312 g/ha, Cochliobolus sativus at 150-200 g/ha, and head scab (Fusarium spp.) at 188-250 g/ha, in cereals; leaf spots (Mycosphaerella spp.) at 125-250 g/ha, leaf rust (Puccinia arachidis) at 125 g/ha, and Sclerotium rolfsii at 200-250 g/ha, in peanuts; black leaf streak (Mycosphaerella fijiensis) at 100 g/ha, in bananas; stem rot (Sclerotinia sclerotiorum) at 250-375 g/ha, Alternaria spp. at 150-250 g/ha, stem canker (Leptosphaeria maculans) at 250 g/ha, and Pyrenopeziza brassicae at 125-250 g/ha, in oilseed rape; blister blight (Exobasidium vexans) at 25 g/ha, in tea  Phytotoxicity Good plant compatibility in most crops with any formulation, and achieved in more sensitive crops by appropriate formulations, e.g. WP, WG or SC.  Formulation types DS; EC; ES; EW; FS; GF; SC; SE; WG; WP; WS'