Variety-related feeding patterns in the brown planthopper, Nilaparvata lugens (stål) (Hemiptera: Delphacidae), on its host, the rice plant

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Abstract
Major potential sources of variation in the feeding of Nilaparvata lugens (Stål) which are not host-dependant are those related to time, i.e. the age of the insect, the length of time the insect is in association with the plant and the time of day. These parameters were investigated with a susceptible, a moderately resistant and a resistant rice variety using honeydew clocks for the collection of honeydew excretion data. It is concluded that there are non-circadian patterns of honeydew excretion which are related to the degree of resistance of the variety and that such feeding and excretion patterns can be used to characterize the relationship between insect populations and rice varieties.