EVALUATION OF PRE-SYMPTOM ACTIVITY OF FUNGICIDES ON SYMPTOM EXPRESSION, CONIDIA PRODUCTION AND VIABILITY OF VENTURIA INAEQUALIS
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Authors
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VIJAY THAKUR* AND G. K. GUPTA
Dr. Y. S. Parmar University of Horticulture & Forestry, Regional Fruit Research Station, Mashobra, Shimla 171 007
Keywords:
Apple scab, Venturia inaequalis, Pre-symptom activity of fungicideAbstract
All eight ergosterol·biosynthesis·inhibiting (EBI) fungicides (bitertanol, etaconazole, myclobutanil, penconazole + captaf, Hexaconzole (pp 523), prochloraz, fenarimol and triforine) shared with carbendazim, thiophanate-methyl, dodine and guazatine, a high level of presymptom activity whereby lesions developed on the leaves were atypical and either chlorotic or reddish brown flecks. Such atypical lesions had reduced viable sporulation.
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