Efficacy of Micro Nutrients on Banana fusarium Wilt. (Fusarium oxysporum f. sp. cubense) and it's Synergistic Action with Trichoderma viride

Abstract

In the present investigations, efficacy of micro nutrients viz., (calcium nitrate, ammonium sulphate, copper sulphate, potassium chloride, sodium chloride, borax, ferrous sulphate and zinc sulphate) against Fusarium oxysporum f. sp. cubense causing panama wilt of banana were studied. The results of experiment revealed that among the micro nutrients used, borax @ 500 and 750 ppm completely inhibited the mycelial growth of Fusarium oxysporum f. sp. cubense followed by zinc sulphate (47.3, 42.7, 31.0 and 14.3 mm at 100, 250, 500 and 750 ppm respectively). The incorporation of borax in solid medium at higher concentrations viz., 500 and 750 ppm., significantly decreased the mycelial growth of the T.viride, whereas the sporulation capacity of T.viride (207.48 x 108 spores/ sq.cm @ 500 ppm) was found to be maximised by the addition of borax. In general, the antagonist was compatible with borax at low concentrations. The maximum inhibition of mycelial growth of F. oxysporum f. sp cubense was found in borax and T. viride inoculated medium.

Keywords

• micro nutrient
• Trichoderma viride
• Fusarium oxysporum f. sp. cubense