Abstract
The disease severity was more in the crop planted at narrow row x plant spacing i.e. 15th September transplanted crop at 45 x 30 cm as compared to wider spacing of 75x30 cm. In vitro evaluation of alcoholic and aqueous extracts of Eupatorium adenophorum, Vitex negundo and Melia azedarach showed that alcoholic extract of Eupatorium was highly effective against B. cinerea. In vitro testing of bioagents viz., strains of Trichoderma species showed 36.0 - 56.0 per cent mycelial inhibition. Among 9 different fungicides tested in vitro against the B. cinerea, trifloxystrobin 25WG + tebuconazole 50WG (Nativo) at 50 mug/ml, propiconazole 25EC (Tilt) at 250 mug/ml, tebuconazole 25EC (Folicur) at 500 mug/ml and difenoconazole 25EC (Score) at 1000 mug/ml showed100 per cent mycelial inhibition. Experiment conducted under polyhouse condition showed that, three sprays at 10 days interval of trifloxystrobin + tebuconazole 50 WG (0.05%) was most effective and gave 81.2 per cent disease control with 70.6 per cent increase in the yield.
NSTL