Effectiveness of bioproduct of Bacillus subtilis to control rice sheath blight disease
2001
Parkpian Arunyanart(Department of Agriculture, Bangkok (Thailand). Division of Plant Pathology and Microbiology. Rice and Temperate Cereals Pathology Research Group) | Nongrat Nilpanit(Department of Agriculture, Bangkok (Thailand). Division of Plant Pathology and Microbiology. Rice and Temperate Cereals Pathology Research Group) | Wichit Srisantana(Department of Agriculture, Bangkok (Thailand). Division of Plant Pathology and Microbiology. Rice and Temperate Cereals Pathology Research Group) | Somkid Disthaporn(Department of Agriculture, Bangkok (Thailand). Office of Senior Experts)
Bioproducts TRF A TRF B liquid formulation of antagonistic Bacillus subtilis against rice sheath blight (Rhizoctonia solani Khun.) were developed by Prince of Songkla University, Kasetsart University and Department of Agriculture under the Thailand Research Fund (TRF). The efficacy of both formulation were tested among other bioproducts compared to the standard fungicide Validacin 3 percent Liq. under greenhouse conditions. CRD of 10 treatments with 7 replications were designed on RD 23 variety. Results indicated that fungicide, Validacin 3 percent Liq. showed the most effective in suppressing sheath blight disease development, followed by bioproducts TRF A, TRF B, Laminar WP, Agroguard Liq., Agroguard WP, BCA No.321 + 562, Subtilar WP and BS 916 Liq. respectively. However, all treatment showed significantly different from control plots (non application). The top four ranks of bioproducts and fungicide were chosen for further test in field trial, wet season 1999 and dry season 2000 of RCB design containing 6 treatments with 4 replications, using RD 23 variety. Results indicated that fungicide, Validacin 3 percent Liq. showed the most effective followed by bioproducts TRF A, TRF B, Larminar WP. And Agroguard Liq. respectively. All treatments showed significantly different from control plots. In conclusion, results from field trial confirm as those in greenhouse.
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