59-05-032 Proceeding

404 Proceedings of the Princess Maha Chakri Sirindhorn Congress Figure 9 Schematic diagram for the in uence of climate change on platypodid beetle outbreaks (Choi 2011) Northward invasion of Nezara Viridula in Japan Climate change impact on the insect pest populationdynamics and rangewas clearly related. Kiritani 2011 showed a study results on the climate impact on the Nezara Viridula (SGS) that the insect pests has invaded northward (Figure 7) due to the land use change and the climate condition change. Its increased population was induced by the increase of early planted rice and also the warmer temperature due to climate change that warm enough for the SGS to move from their original range.The geographical shiftof insect habitat has also studied by Babasaheb 2012 (Figure 8). Outbreaks of platypodid beetles in Korea and Japan The study of the platypodid beetles outbreak in Korea and Japan by Choi 2011 (Figure 9) showed that the phenomenon was related to climate change. The particular case of the platypodid beetles outbreaks was attributed to the heat stress that affects to the weakness of the tree while in the same time strengthen the beetles by positively effects its fast development. The increase population of the beetles, as a result, obtain more food from the weaken trees. 3. Conclusion Climate change plays a very important role in food security as food crop loss can be directly affected by the insect pest outbreak. Insects and insect pests’ lives were affected from the rising temperature to their physical, range of expansion, population diversity and phenology. Some species move to the cooler habitats as the original environments were warmed up to the level not suitable for their living due to the climate change. Various species have adjusted the