Research priorities for rice pest management in tropical asia: A simulation analysis of yield losses and management efficiencies

文献类型： 外文期刊

第一作者： Willocquet, L

作者： Willocquet, L;Elazegui, FA;Castilla, N;Fernandez, L;Fischer, KS;Peng, SB;Teng, PS;Srivastava, RK;Singh, HM;Zhu, DF;Savary, S

作者机构：

关键词： Chilo suppressalis;Cnaphalocrocis medinalis;Cochliobolus miyabeanus;Cyperus spp;Echinochloa spp;Hydrellia philippina;Monochoria vaginalis;Nilaparvata lugens;Oryza sativa;Pyricularia oryza;Rhizoctonia solani.;Sarocladium oryzae;Scirpophaga incertulas;Scirpophaga innotata;Sesamia inferens;Xanthomonas campestris pv. oryzae

期刊名称：PHYTOPATHOLOGY （ 影响因子：4.025； 五年影响因子：4.394 ）

ISSN： 0031-949X

年卷期： 2004 年 94 卷 7 期

页码：

收录情况： SCI

摘要： A simulation study was conducted to assess the current and prospective efficiency of rice pest management and develop research priorities for lowland production situations in tropical Asia. Simulation modeling with the RICEPEST model provided the flexibility required to address varying production situations and diverse pest profiles (bacterial leaf blight. sheath blight, brown spot, leaf blast, neck blast. sheath rot, white heads, dead hearts, brown plant-hoppers, insect defoliators, and weeds). Operational definitions for management efficacy (injury reduction) and management efficiency (yield gain) were developed. This approach enabled the modeling of scenarios pertaining to different pest management strategies within the agroecological contexts of rice production and their associated pest injuries. Rice pests could be classified into two broad research priority-setting categories with respect to simulated yield losses and management efficiencies. One group, including weeds, sheath blight. and brown spot, consists of pests for which effective pest management tools need to be developed. The second group consists of leaf blast. neck blast, bacterial leaf blight, and brown plant-hoppers, for which the efficiency of current management methods is to be maintained. Simulated yield losses in future production situations indicated that a new type of rice plant with high-harvest index and high-biomass production ("New Plant Type") was more vulnerable to pests than hybrid rice. Simulations also indicated that the impact of deployment of host resistance (e.g., through genetic engineering) was much larger when targeted against sheath blight than when targeted against stein borers. Simulated yield losses for combinations of production situations and injury profiles that dominate current lowland rice production in tropical Asia ranged from 140 to 230 g m(-2). For these combinations, the simulated efficiency of current pest management methods. expressed in terms of relative yield gains, ranged from 0.38 to 0.74. Overall, the analyses indicated that 120 to 200 x 10(6) tons of grain yield are lost yearly to pests over the 87 x 10(6) ha of lowland rice in tropical Asia. This also amounts to the potential gain that future pest management strategies could achieve, if deployed.

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