Contents & Foreword, Characterizing And ... - IRRI books

Table 10. Information used to prioritize research and assess opportunities for gains.Potential yield Probability of Farmer Do farmers’ Resistant orProne loss in indivi-yield loss in assessment Farmers attempts to competitivePests Status a to outbreaks dual seedbed an individual of problem in know how to manage it lead rice varietiesin Cambodia or field field if the pest endemic area manage it to unsustainable available?is not managed practices?InsectsBrown planthopper A Yes High Low Major No Yes YesStem borer C No Medium Low Major No Yes YesGall midge C No Medium Medium Major No Yes YesGrasshopper C Yes High Low Major Yes Yes NoRice bug C No Medium High Major Yes Yes NoArmyworm A Yes High Low Major No Yes NoThrips A Yes Medium Medium Major No Yes NoCaseworm C No Low Low Major No Yes NoLeaffolder C No Low Low Major No Yes NoCricket C No Low Low Major Yes Yes NoWeedsLythraceae C No High High Minor Yes No NoCyperus difformis C No High High Minor Yes No NoC. iria C No High High Minor Yes No NoEchinochloa colona C No High High Minor Yes No Yes?(allelopathic rice)E. crus-galli C No High High Minor Yes No Yes? (competitivecultivars)DiseasesTungro A No Low Low ? No No YesBrown spot C No Low Low to medium Minor Yes No NoBlast A Yes Medium Low Minor No No NoSheath rot C No Low Low Minor No No NoOthersRats C & A Yes High High Major Yes Yes NoCrabs C & A No High High Major Yes Yes Noa A = acute, C = chronic.Characterizing biotic constraints to production . . . 261