Biological control of collar rot, dry root rot, wilt and gray mold of chickpea: report of work, July 23, 1992 - March 22, 1993. Legumes Pathology progress report no. 20
1993
Mukherjee, P.K.
One isolate of Trichoderma (NP-1) was effective against Sclerotium rolfsii in laboratory and green house studies; One isolate each of Trichoderma (27), Aspergillus (67) and Penicillium (Ant 2) reduced dry root rot in laboratory tests. Isolate number 67 produced asexual stage (and antibiotics) on Hi Media PDA, but sexual stage on laboratory-made PDA. Out of several fungal isolates tested, none provided protection against wilt in sick soil with JG 62 as test variety. However, some of the isolates of fluorescent pseudomonads delayed the wilting. Among the four pathogens tested, most encouraging result was obtained with Botrytis gray mold. One isolate of Trichoderma (T-15) gave high degree of protection to the seedlings of highly susceptible variety H-208. Trichoderma not only interfered with penetration of the plant by Botrytis, it also prevented spread of the lesion and sporulation, by quickly colonizing the dead tissues. In vitro, it was found to lyse the hyphae of B. cinerea, as well as produced certain antibiotics in culture. Four vinciozolin (Ronilan 50 WP)-tolerant isolates of Trichoderma have been isolated. These could be integrated with vinciozolin for improving the disease control potential of the antagonist
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