Biosecurity, pests, weeds and diseases, Grains and field crops, Horticulture
Trials : 88BY26, 88PE34, 88MD35
Control of Rhizoctonia solani infection of potato stems and daughter tubers was demonstrated by preplanting applications of tolclofos-methyl (RIZOLEX TM) to either cut or round seed tubers. Yield of tubers from cut seed treated with Rizolex was increased over that of cut seed cured before planting bu not when seed was cut and planted the same day. Crops grown from round seed treated with Rizolex yielded higher than from untreated round seed.
Surface sterilization of seed tubers with Sodium hypochlorite was effective in reducing stem damage but not in reducing daughter tuber sclerotes. This indicates that where ther is a significant soil population of Rhizoctonia solani, even though stem infection is prevented, late build-up of sclerotes on the tubers may still cause cosmetic problems.
Number of Pages
Floyd, R M. (1989), Rhizoctonia control in potatoes and potato resistance to powdery scab.. Department of Agriculture and Food, Western Australia, Perth. Report.