Management of root rot complex of Gerbera caused by Fusarium oxysporum f. sp. gerberae and Pythium irregualre by Trichoderma spp.

All the fungal bio-control agents were found effective against root rot complex in vitro and in vivo. Among them, T. viride isolate 2 was observed as most effective, which inhibited the radial growth of F. o. f. sp. gerberae (39.2 %) after four days and after eight days with the maximum inhibition percentage (71.6 %) over control. Similarly, T. viride 2 effectively inhibited the radial growth of Pythium irregualre as (36.5 %) after four days and eight days of incubation the inhibition percentage over control was (68. 0%). T. viride isolate 2 was highly effective in the management of the disease. The pooled data of both the years showed that in case of F. oxysporum, the maximum root length (9.63 cm), shoot length (29.85 cm), root weight (4.68 g) and shoot weight (11.86 g) was recorded whereas in case of P. irregualre the maximum root length (4.91 cm), shoot length (11.17 cm), root weight (9.68 g) and shoot weight (26.60 g) was also recorded with the same treatment.