Efficacy of Fungicides, Bio-Agents And Botanicals Against Collar Rot of Betelvine

Collar rot caused by Sclerotiurn rolfsii Sacc, has been observed to cause rapid mortality in betelv me plantations. Among the eleven fungicides and one antibiotic tested against S. rolfsii in vitro, Metalaxyl + Mancozeb (0.1%), Difenoconazole (0.05%), Propiconazole (0.05%), Hexaconazole (0.05%) and Metiram (0.1%) were reported to be effective in controlling S. rolfsii. In biological control, Trichoderma lignorum, Gliocladium virens and T. viride were most effective against S. rolfsii. However, in case of botanicals, the plant extracts of Allium sativum, Azadirachta indica and Catheranthus roseus (all at 10% concentration) were promising against S. rolfsii.