Pest profiles at varying nutrient input levels
2001
Sta. Cruz, P.C. | Simbahan, G.C. | Hill, J.E. | Dobermann, A. | Zeigler, R.S. | Pham Van Du | dela Peña, F.A. | Samiayyan, K. | Suparyono | Nguyen Van Tuat and Zhong, Z.
Pests were monitored over three seasons at six irrigated Rice Research Consortium (IRRC) sites in China (Jinhua), India (Thanjavur), Indonesia (Sukamandi), the Philippines (Muñoz), and Vietnam (Cuu Long and Hanoi) to characterize pest damage profiles as affected by nutrient input levels based on the farmers' fertilizer practice (FFP) and site-specific (improved) nutrient management (SSNM). The research was superimposed on 137 monitoring farms of the Reversing Trends of Declining Productivity (RTDP) Project. Biophysical data were taken by the RTDP team and pest survey information was gathered by the pest impact assessment team at each site. For the first two monitoring seasons, sheath blight incidence was observed at all sites. Grain discoloration due to pathogens was recorded at five sites (except Jinhua) and was dominant at four sites (Cuu Long, Muñoz, Sukamandi, and Thanjavur). Red stripe was observed in Cuu Long and Sukamandi for both the dry and wet seasons. Other pests observed at each site were (1 brown spot, narrow brown spot, leaffolder, and rice bug in Cuu Long; (2) bacterial blight, brown spot, leaffolder, and stem borer in Hanoi; (3) stem borer in Jinhua; (4) kernel smut, narrow brown spot, rice bug, and whorl maggot in Muñoz; (5) narrow brown spot, stem rot, gall midge, stem borer and rat in Sukamandi; and (6) bacterial blight, brown spot, gall midge, brown planthopper, leaffolder, stem borer, and whorl maggot in Thanjavur.
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