Abstract: The difference in transmission efficiency to nine kinds of pesticides between Odontotermes formosanus (Shiraki) and Reticulitermes chinensis (Snyder) was investigated by laboratory tests. The results showed that the transmission efficiencies of R. chinensis to lambda-cyhalothrin, pyridaben and triazophos were higher than those of O. formosanus. At the same time, the transmission efficiencies of O. formosanus to phoxim, beta cypermethrin, abamectin, acetamiprid and methomyl were higher than those of R. chinensis. There was no obvious difference in transmission efficiency to bifenthrin between these two termites.