Reference Report for IND20565482
| Title: | Weed hosts for Rhizoctonia solani, causal agent for Rhizoctonia foliar blight of soybean (Glycine max) |
| Authors: | Black, B.D., Griffin, J.L., Russin, J.S., Snow, J.P. |
| Source: | Weed Technol. 1996, 10(4):865-869 |
| Abstract: | Greenhouse studies were conducted to determine the host status of weed species for Rhizoctonia solani AG-1, which causes Rhizoctonia foliar blight of soyabean. Weed species were barnyardgrass (Echinochloa crus-galli), broadleaf signalgrass (Brachiaria platyphylla), common cocklebur (Xanthium strumarium), entireleaf morningglory (Ipomoea hederacea var. integriuscula [Pharbitis hederacea]), hemp sesbania (Sesbania exaltata), itchgrass (Rottboellia cochinchinensis), johnsongrass (Sorghum halepense), large crabgrass (Digitaria sanguinalis), northern jointvetch (Aeschynomene virginica), prickly sida (Sida spinosa), purple nutsedge (Cyperus rotundus), redweed (Melochia corchorifolia), sicklepod (Senna obtusifolia) and smooth pigweed (Amaranthus hybridus). Seedling weeds were inoculated with suspensions containing intraspecific group IA and IB isolates of the fungus. In the first study, sclerotia of IA were recovered from the tissue of all weeds except smooth pigweed, and mycelia of IA were recovered from all except smooth pigweed and redweed. In that study, neither microsclerotia nor mycelia of IB were recovered from sicklepod, barnyardgrass, or large crabgrass, and only microsclerotia were recovered from itchgrass and purple nutsedge. In the second study, sclerotia of IA, microsclerotia of IB, and mycelia of each isolate were recovered from all weed species. In other studies, R. solani spread from at least 6 of 7 weed species to a noninfected soyabean plant growing in close proximity. These studies emphasize the importance of weed control, not only for reducing plant competition and increasing yield, but also for the potential impact on the development of RFB |
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