author(s)
Partha Sarathi Nandi, Kaushik Chakraborty

abstract
Effective alteration of temperature regimes is found prudent to check the insect pest menace as insects are poikilothermic. Effect of high (40-50 °C), moderate (14 °C and18 °C) and low temperature (-4-0 °C) regimes on the survivability of mango mealy bug, Droschia mangiferae was noted in laboratory condition. High temperature regime starts from 40 °C and low temperature from -4 °C respectively. Temperature of both high and low was subsequently increased for 2 °C for each step. Extent of sample insect mortality, in gross, was in consonance with the degree of elevated high temperature and also with the retention time. Even exposure of 10-20 minutes was sufficient to achieve 100% mortality at 480 and 50 °C. However, moderate temperature of 14 °C and 18 °C has very little visible effect on the morbidity of the mealy bug. When the sample was kept at low temperature of 4 °C and 0 °C, for 10 and 20 minutes respectively, 86.7% and 100% died.