Evaluation of Trichoderma SPP. Against Sclerotium Rolfsii In Vitro.

ABSTRACT

To evaluate the effect of Trichoderma spp. on radial growth of Sclerotium rolfsii, three species of Trichoderma viz., Trichoderma viride, Trichoderma harzianum and Trichoderma longibrachiatum were selected. The results from this experiment revealed that T. viride (TvL), T. harzianum 4 (Th 4) and T. harzianum 14 (Th14) isolates were found effective and showed lowest radial growth of 3.50 cm and highest per cent inhibition (56.25%) of S. rolfsii but were statistically on par with each other. The highest radial growth (4.23 cm) and lowest per cent inhibition (47.1%) were recorded with T. longibrachiatum (Tl2). Results from non-volatile assay indicated that irrespective of concentration, culture filtrate of T. viride (TvL) was found to be most effective; recorded lowest radial growth and highest per cent inhibition followed by T. harzianum 14 (Th14) and T. harzianum 4 (Th4).