Suppression of soil borne pathogens through fungal antagonists with Azadirachta indica as a carrier

The combined effect of biological control agents Trichoderma harzianum, T. viride and Beauveria bassiana with aqueous neem leaf extract against Alternaria solani, Fusarium oxysporum and Colletotricum gloeosporioides were evaluated in vitro. T. harzianum along with 10 and 50% neem leaf extract resulted in 100% inhibition of the growth of the test pathogens followed by T. viride with 50% extract. However, B. bassiana at both 10 and 50% extracts failed to produce any significant effect.