Efficacy of Translaminar Fungicides Against Late Blight of Potato in Subtropical Plains

摘要

Field experiments were conducted during rabi (post-rainy) seasons of 2006-2007 and 2007-2008 on the efficacy of two translaminar cymoxanil and dimethomorph based fungicides against late blight of potato. In susceptible cv. Kufri Bahar, mancozeb (one spray) followed by three sprays of either cymoxanil + mancozeb or dimethomorph + mancozeb were highly effective in managing late blight. In moderately resistant cv. Kufri Sutlej, cymoxanil + mancozeb, dimethomorph + mancozeb, and metalaxyl + mancozeb wereequally effective when applied twice or when applied once after mancozeb spray.