Bioefficacy of different chemical fungicides for management of mango powdery mildew in South Gujarat.

摘要

Powdery mildew of mango caused by Oidium mangiferae has become a serious and widespread problem in many parts of India, including South Gujarat. A field experiment was conducted for three seasons (2007-2010) to investigate the efficacy of six fungicides, triadimefon (Bayleton 25% WP), fenarimol (Rubigan 12% EC), flusilazole (Punch 40% EC), penconazole (Topas 10% EC), wettable sulphur (Sulfex 80% WP) and dinocap (Karathane 48% EC) along with control (water spray) against mango powdery mildew on the most popular cv Alphonso. Each fungicide was sprayed thrice at 15-d-intervals on to newly emerged panicles of second flush of cultivar Alphanso and data on disease severity and fruit yields were taken 10 d after the last spray. The fungicide flusilazole @ 0.015% (Punch 40% EC) was found most effective in reducing the disease (6.26%) and increasing the fruit yield (75.97 kg tree-1) compared to 50% disease severity and 43.94 kg tree-1 fruit yield in control.