tricyclazole

95%tech, 75%, 50%wp,

Fungicide

FRAC  16; MBI: reductase

NOMENCLATURE

Common name tricyclazole (BSI, E-ISO, (m) F-ISO, ANSI)

IUPAC name 5-methyl-1,2,4-triazolo[3,4-b][1,3]benzothiazole 

Chemical Abstracts name 5-methyl-1,2,4-triazolo[3,4-b]benzothiazole 

CAS RN [41814-78-2]  EEC no. 255-559-5  Development codes EL-291 (Lilly) 

PHYSICAL CHEMISTRY

Mol. wt. 189.2  M.f. C9H7N3S  Form Crystalline solid.  M.p. 187-188 ºC  B.p. 275 °C  V.p. 0.027 mPa (25 ºC)  KOW logP = 1.4  Henry 3.19 ´ 10-6 Pa m3 mol-1 (calc.)  Solubility In water 1.6 g/l (25 ºC). In acetone 10.4, methanol 25, xylene 2.1 (all in g/l, 25 ºC).  Stability Stable at 52 ºC (highest storage temperature tested). Relatively stable to u.v. light. 

APPLICATIONS

Biochemistry Melanin biosynthesis inhibitor (reduction of 1,3,8-trihydroxynaphthalene and vermelone).  Mode of action Systemic fungicide, absorbed rapidly by the roots, with translocation through the plant.  Uses Control of rice blast (Pyricularia oryzae) in transplanted and direct-seeded rice. Can be applied as a flat drench, transplant root soak, or foliar application. One or two applications by one or more of these methods give a season-long control of the disease.  Formulation types DP; GR; SC; WG; WP.