EFFECT OF BOTANICALS AND CHEMICALS ON THE MANAGEMENT OF BLIGHT (ALTERNARIA-ALTERNATA, ALTERNARIA-HELIANTHI) OF SUNFLOWER (HELIANTHUS-ANNUUS)

Efforts have been made to study the effects of some botanicals and che micals on the management of blight (Alternaria alternata and A. helian thi) of sunflower (Helianthus annuus). Results indicated that aspirin was highly effective in inhibiting the mycelial growth of A. alternata , while Allium repa accelerated the growth. On the other hand, additio n of dextrose to the medium, carbendazim and Allium sativum were inhib itory to A. helianthi. Studies also indicated that foliar application of Allium sativum bulb extracts at 1 % concentration was significantly superior in controlling the disease and increasing the yield and was on par with carbendazim 1 % a. i.. KCI (soil application) and azadirac htin also reduced the disease intensity and increased the yield over c ontrol.