Comparative efficacy of bio agents, botanicals and fungicides against alternaria leaf spot (Alternaria brassicae) of cauliflower (Brassica oleracea var. botrytis)

Abstract

An experiment was conducted to evaluate the effect of two plant extracts, two bio-agents and two fungicide in in-vivo against Alternaria brassicae causing leaf spot of cauliflower. The minimum plant disease intensity (%) was observed in the treatment [email protected]% (21.30%) followed by Mancozeb @ 0.2% (23.15%), Eucalyptus @5% (24.29%), Lantana camara @ 10% (25.19%), Trichoderma harzi anum @ 2.0% (25.78%), pseudomonas fluruscencs @ 2.0% (27.04%) as compared to untreated control (28.98%). Fresh weight of cauliflower head indicates that the maximum fresh weight with Propiconazole (1.29%) as compared to untreated control (0.67). The highest yield was given by the plants treated with propiconazole (70.06 t/ha) as compared to unteated control (31.58t/ ha).