Thiamethoxam belongs to a new class of insecticides known as neonictinoids. It owns higher biological activity, more safety and wider spectrum in applying against insect and has the brighter future in market. In this dissertation, hydrolysis and photolysis of thiamethoxam and the effects of thiamethoxam on respiration of soil were studied thoroughly. The results obtained from the experiments are helpful in forecasting thiamethoxam’s environmental behaviors, guiding farmer to apply the pesticide ...