Effects of Climate Change in Agricultural Insect Pest

have serious effects in every aspects of agriculture.Changed patterns in climatic factors like temperature, precipitation, humidity and other meteorological components are affecting the quality and quantity of agricultural commodities production.Along with direct impacts in crop productivity, climate change is threatening global food production via pest related losses of food crops.Each additional degree of temperature rise could cause yield losses from insect pests to increase by a further 10-25%.Climate change has increased pest population and their damage potential by expanding distribution, enhancing survivability and allowing to develop the adaptability of insect pest.Rising temperature, modified precipitation patterns, disturbed gaseous composition of atmosphere etc. are causing the change in population, mobility, behavior of insect pest.This change has been affecting the global agricultural production figure.Largest grain producers of the world viz.China, the US, France etc. are already facing massive infestation of crop pest and consequent yield losses.Climate change has been the talk of the century.Observed shifts in global climatic phenomena and consequent losses have caught the attention of the world.Climate Change can be illustrated as the phenomenon that includes change in environmental factors like temperature, humidity and precipitation over long period of time.Due to increased temperature, elevated CO2 and other harmful gases, irregular rainfall, global food production is under the threat.Global temperature has been steadily rising since 1900 with an increase of about 1°C since then.A variety of numerical models representing the physical processes in the atmosphere, ocean, cryosphere and land surface simulate the response of the global climate systems to increasing greenhouse gas concentrations and forecast how the climate is expected to change until 2050 and 2070.Effects of climate change can be observed in multiple ways.The assessment of climatic factors like temperature, precipitation (amount, frequency and timing), humidity, wind (velocity, timing), gaseous concentration etc. can provide real insights of climate change.As well as the examination of consequent effects of modification of these factors can also act as indicator of climate change.As the complexity of climate variables have direct concern in agriculture, the major impacts on agriculture is inevitable.As in agriculture, climate change can intervene in normal plant physiologies like photosynthesis, respiration, transpiration, nutrient uptake, mineral balance, ionic exchange etc.As well as, climate change can interfere crop production via modification of population and function of pests and pathogens.Climate variables like temperature, humidity, precipitation etc. are the factors for the growth, development and multiplication of creatures like insects, fungi, bacteria, virus etc., pest population is also expected to change as with the change in the climate.Along with this, climate change is expected to bring changes in host plant resistance against diseases and pests.The resistance can be overcome by quicker disease cycles and modified physiologies of insect pest.Changing climate variables can either increase or decrease the pest population.Species which can overcome the extremities of climate and adapt in the changed atmosphere can maintain its population and consequently devour crop vegetation.In comparison to the insect species found in tropical and temperate regions, shifting temperature have significant effects on species found in temperate region.Altitudinal shift and intrusion in higher altitudes by insect pests have been evident in temperate regions of the world.This has brought new challenges for sustainability of agriculture. Materials and MethodsThis review paper is based on researches, journals and articles available online and offline.Papers and books from international research and observations related to climate change and their consequences on agriculture particularly via insect pests are made as basis for reviewing.Datas from international journals, magazines, documentaries etc. have been used for the paper.Booklets, brochures, projects results, programs, videos etc. have been used as the secondary source of information.Browsing, collecting, observing, scanning and sorting out of datas were done to make the paper complete and comprehensive.For making the paper more conclusive, many professors, entomologists, climate change activists were asked with concerned information on the topic.