Cultural practices for the control of yellow rice stemborer Scirpophaga incertulas (Walker)
2005
Garcia, R.D. | Rillon, G.S. | Marquez, L.V., Philippine Rice Research Inst., Science City of Munoz, Nueva Ecija (Philippines)
The yellow rice stemborer (YSB) Scirpophaga incertulas (Walker) is a chronic pest of modern rice cultivars. Control of this pest is difficult, even with the use of insecticides. Cultural farming practices such as time of planting, fertilizer application, water management and removal of egg masses were evaluated for their effectiveness in rice stemborer control. YSB damage during the vegetative stage manifested as deadhearts was negligible (0.01-6.6 percent) in regular and late planted rice. Whitehead incidence was significantly higher in late planted rice (9.6-17.84 percent) than in regular planted rice (0.07-4.3 percent) YSB larvae (36 percent) and pupae (64 percent) were present in rice stubbles even after harvest, most of which were found below ground level (74 percent). Egg mass count was highest in plots with high dose fertilizer and intermittent irrigation. Whitehead incidence was high in plots with high dose fertilizers, whether irrigated intermittently or flooded. Whitehead was highest in plots without egg mass removal, although the difference from plots with manual removal of eggs was negligible.
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