• Rajesh B. Desai

According to Intergovernmental Panel on Climate Change, it is defined as ―Change in climate over time, either due to natural variability or as a result of human activity‖. Most of the warming observed over the last 50 years is attributable to human activities. The global mean surface temperature is predicted to increase by 1.4 to 5.8°C from 1990 to 2100. If temperatures rise by about 2°C over the next 100 years, negative effects of global warming would begin to extend to most regions of the world (IPCC, 2001). Such changes in climate and weather could profoundly affect the status of insect pests of crops. These may arise not only as a result of direct effects on the distribution and abundance of pest populations but also indirect effects on the pests’ host plants, competitors and natural enemies (Porter, et al., 1991). Some pests which are already present but only occur in small areas, or at low densities may be able to exploit the changing conditions by spreading more widely and reaching damaging population densities (Porter, et al., 1991 and Bale, et al., 2002). The occurrence of climate changes is evident from increase in global average temperature, changes in the rainfall pattern and extreme climatic events. These seasonal and long term changes would affect the fauna, flora and population dynamics of insect pests. The abiotic parameters are known to have direct impact on insect population dynamics through modulation of developmental rates, survival, fecundity, voltinism and dispersal. Among the climatic factors, temperature is an important factor. Therefore climate change would result in changes in the population dynamics of insect pests. Thus temperature rise plays a pivotal role in insect population dynamics. Keeping these facts the topic on the impact of climate change on insects is discussed here.

Environmental change, Insect growth and Population.

"Different Environmental Parameters Effect on Changing the Insect growth and Population", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 12, page no.197-201, December-2021, Available :http://www.jetir.org/papers/JETIRFI06031.pdf

"Different Environmental Parameters Effect on Changing the Insect growth and Population", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 12, page no. pp197-201, December-2021, Available at : http://www.jetir.org/papers/JETIRFI06031.pdf