OAR@ICRISATClimate change effects on pest spectrum and incidence in grain legumesH CSharmaauthorMPathaniaauthorA RWarauthorTPavaniauthorSVashisthauthorGlobal warming and climate change will influence activity, diversity, distribution and population dynamics of insect pests including the grain legumes. Several insect pests damage grain legume crops, of which the pod borer, Helicoverpa armigera; spotted pod borer, Maruca vitrata; spiny pod borer, Etiella zinckenella; pod fly, Melanagromyza obtusa; aphid, Aphis craccivora; defoliators, Spodoptera litura and S. exigua; thrips, Megaleurothrips usitatus and Caliothrips indicus and the bruchid, Callasobruchus chinensis cause extensive losses in grain legumes. The incidence and extent of losses due to these pests varies across seasons, locations, and cropping systems. The pest spectrum on grain legumes will change considerably due to impending global warming and climate change. The geographical distribution of some of the pests might extend to temperate regions in Europe and America, while the outbreaks of some other pests will become more frequent. Several outbreaks of pod borer, H. armigera and spotted pod borer, M. vitrata have been recorded on grain legumes in India, which at times have resulted in complete crop loss. The scale insect, Ceroplastodes cajani in pigeonpea and beet armyworm, Spodoptera exigua, mealy bug, Ferrisia virgata, and white fly, Bemisia tabaci in chickpea have emerged as new pests; while leaf miner, Porphyrosela neodoxa, mealy bugs, Drepanococcus cajani, and Coccidohystrix insolita are some of the emerging pest problems in pigeonpea in India. In addition, there will be greater genotype x environment interactions for expression of resistance to insect pests, and this warrants a greater effort for identification of diverse sources of resistance and need for integrated pest management packages that will be effective under global warming and climate change.Food LegumesClimate Change2015-12Indian Society of Pulses Research and Development (ISPRD)Book Section

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