59-05-032 Proceeding

396 Proceedings of the Princess Maha Chakri Sirindhorn Congress et al. 2011). Higher temperature is the main factor that affects all living organism by causing the environmental change. Sharma, 2010, has reviewed the effect of global warming and climate change on insect pests at most aspects such as geographic diversity, abundance and other related surrounding factors. He has showed how climate change related to insect pest population dynamic and the effect to crop losses. Human food crop plants damaged annually by insects are estimated to be 13.6% globally (Benedict 2003 in Sharma 2010). Insect and insect – pests, as part of key factors in Thailand agriculture, were affected by the rising temperature due to the damaged and changed of their natural habitat and environment. Temperature forecast inThailand on A2 Climate Scenario using PRECIS (providing regional climate for impact study)model was resulting in rising of both average minimumand averagemaximum from1931 - 2100 with an average of 4 - 5 °C increase from1991- 2000 and 2091 - 2100 (Climatological Center,Thailand 2009). Since insects are poikilotherms that temperature is very important environmental factor influencing their lives in mostly all aspects such as behavior, distribution, development, survival and reproduction (Yamamura and Kiritani 1998). Therefore, factors of the climate change, such as elevated CO2, increased temperature and soil moisture depletion are significantly attributed to the insects’ dynamics, e.g. diversity, distribution range and developments (Jonsson et al. 2007, Lennon 2015). This study aimed to review international and Thailand literatures related to some insect population dynamics as caused by global warming in general. In Thailand, forest fire particularly in the north have been a major cause for the changes of insect diversity and range of distribution due to damage to its habitat and food sources. Babasaheb et al. 2012 indicated that temperature plays significant role as part of abiotic factor, in the natural ecosystem (Figure 1). The rising temperature drives the insects and insect – pests at the tropic and subtropics areas to move to the cooler region in the temperate zones where the temperature is more suitable to its’ living and the host plants development. Warmer temperatures generally lead to faster development and growth of insects that consequently brings the outbreak of them to happen (Figure 2). At Mae Fah Luang University, Chiang Rai province, Thailand, a migration of a honey bees (Apis Dorsata) to nest in the building areas was found some years of 2011The assumption of the event was about the damaging or disturbed habitats due to forest fire especially in dry season (April – May). Most of the forest fire in the north of Thailand was set by the villagers who needed to burn down the bush to have the new budding of some edible plants and mushrooms after some time of the fire finish (Singhakant 2012). Internationally, the outbreak of some insect-pests were studied that could attributed to the changed environments. The platypodid spreading in Korea and Japan (Choi 2011), the Nezara Viridula migration to the northern areas (Kiritani 2011) was due to the higher temperature that increases the stress to their original habitats.