Abstract: The infestation of 3rd instar Nilaparvata lugens with different experiences was studied, and the following results were obtained. The experiences on resistant variety "Mudgo" could improve the honeydew excretion and survival of N. lugens on theBphl-carried varieties such as Mudgo, IR26, IR28, IR34, and also enhance the preferencefor the tested variety "Mudgo'; the experience of N. Lugens on resistant variety "ASD7", however, only contributed to the increase of honeydew excretion and survivalon the same variety, thus implying that the effects of experience were characterized by variety-dependence to some extent. It is still recognized that the amount of honeydew excretion was much less on Mudgo and ASD7 than on TN1 for N. lugens with the same experience on the resistant varieties.

Key words: Nilaparvata lugens, resistance to insect, host-related experience, infestation, rice variety