Management of soil-borne disease in rice-vegetable systems
2002
Alberto, R.T. (Central Luzon State Univ., Munoz, Nueva Ecija (Philippines)) Duca, M.S.V. | Santiago, S.E. | Opina, N.L. | Padua, L.E. | Miller, S.A.
Nueva Ecija is the largest rice producing province of the Philippines and also the largest producer of onion in the country both for export and domestic use. It also grows other vegetables like eggplant in commercial quantities for domestic consumption. Like other economically important crops, these vegetables are not free from disease problems especially those that are caused by soil-borne pathogens. To date there are no known effective methods of managing these diseases under field condition except for the use of resistant varieties. Because of the seriousness of the problem, new approaches may be developed by exploring the use of biological control agents, genetic resistance and cultural management that can significantly reduce the incidence and severity of the diseases caused by the soil-borne pathogens. Among the 14 cultivars tested for resistance, incidence of pink root was low in Niagara, Condor, Robins Yellow and Red Pinoy. Bacillus sp. (LED 118) isolate was found to be potential bacterial antagonist against three species of Fusarium, S. rolfsii and R. solani. It was most effective if applied as protective coating on the root surface. Burning rice hull (appx. 6 inches thick) can effectively reduce the incidence of soil-borne diseases in the field. Planting non-host crops of Phoma terrestries in rotation with onion significantly reduce disease pressure resulting on low incidence and severity of pink root infection. Bacterial wilt incidence was reduced in eggplant cultivars EG 203, Jackpot, DLP and grafted plant (EG 203 + Jackpot)
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