CORESTA Meeting, Agronomy/Phytopathology, Louisville, 1991

Effect of fungicides on tobacco blue mold in the field

VASILAKAKIS C.
Tobacco Institute, Drama, Greece
Thirteen fungicides, in field application, were used in Krinides Kavala region against tobacco blue mold, in a three-year experimentation (1987, 1988 and 1990). Ridomil MZ 63.5 WP (metalaxyl 7.5% + mancozeb 56%) 1.5 kg/1000m2 (with transplant water) and 250 g/HL (as foliage spray), Ridomil 5G (metalaxyl 5%) 3 kg/1000m2 (broadcast in the row), Ridomil CT 60 (metalaxyl 10% + chlorothalonil 50%) 1 kg/1000m2 (with transplant water) and 250-300 g/HL as foliage spray, Ridomil 20 g. a.i. + CME 151 (Dimethomorph) 50g a.i., EXP 2 50 40 g/HL and Galben-M 8-65 (benalaxyl 8% + mancozeb 65%) 400 g/HL, all of these as foliage spray, provided excellent protection against the disease. Previcur N (propamocarb hydrochloride 72.2%) 7.5 AND 5 1/1000m2 (with transplant water) gave very good results in 1987, but they were not effective in 1988. Patafol (ofurace 6% (Milfuram) + mancozeb 64% ) 25C ABD CME 151 50% 200 and 150 g/HL (as foliage spray), provided very good protection. Manex (maneb 37%) provided good protection, but a systemic infection appeared. Caltan SC (ofurace 6% + folpet 45%), Daconil 75% WP (chlorothalonil 75%) and Euparen Curzate 54.8% (dichlorofluanid 50% + cymoxanil 4.8%) provided no satisfactory protection. Under the conditions of this experimentation, none of the fungicides tested was phytotoxic.