Abstract:In order to verify a hypothesis on the migratory route in seasonal migration of Nitaparvata lugens and Sogalella furcifera, test on the releasing and recapturing of marked planthoppers were carried out in 1978 and in 1979. The results showed that both Nilaparvata lugens and Sogatella furcifera are capable of flying for long distance.In 1978, one red marked brown planthopper, released at Dongguan county, has been recaptured at Chen county in the northward migration, another green marked brown planthopper, re...