Insect pest populations are affected by both biotic (eg predators, parasitoids, pathogens and interspecific or intraspecific competition) and abiotic (eg temperature, precipitation, humidity, wind speed and sunshine hours) factors. Agronomic management practices are also of considerable importance. Likely impacts of any change in climate on populations of pests are manifold. They range from expansion in the geographical range of pests, increased risk of invasion, changes in overwintering patterns, natural enemy-pest interactions, changes in population growth rates, change in crop-pest synchrony, pest control factors and finally changes in pest complexes on spatial and temporal bases. Results obtained through current modelling approaches do not account for all the factors operating. Moreover, it may not be possible to replicate the methodology of other countries in the Indian context, given the wide-ranging socioeconomic conditions and different agro-ecology, and a different approach is needed to tackle the problem. Consolidation of all existing studies done in various parts of the country may act as a foundation, which can be supplemented by incorporation of the vast resources of data from various government agencies.
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