Feeding effect of brown and white-backed planthoppers on vegetative growth of rice plants

Abstract

Abstract: Anylon net experimental system was used to study the feeding effect of different nymph densities of brown planthopper (BPH) and white-backed planthopper (WBPH) on the vegetativegrowth of rice plants in plastic pots. The results show that with the increase of nymph density,the dry weight of planthopper adults and the leaf area and shoot dry weight of rice plants weredecreased. The ratio of leaf dry weight shoot dry weight and the dry matter in leaf allocated byrice plants were increased with increasing infestation by planthoppers. Avery significant linearrelationship was observed betwecn the total dry weight of two planthoppers and the loss of shootdry weight of rice plants. If the dry weight of two planthoppers was increased by 1mg, the lossof shoot dry weight caused by BPHand WBPHwas estimated by 26.01 and 21.90mg, respectively. The possible mechanism of feeding infestation by planthoppers was discussed.

Key words: Rice, Nilaparvata lugens, Sogatella furcifera, Feeding, Infestation

Wang Rongfu, Cheng Xianian, Zou Yunding. Feeding effect of brown and white-backed planthoppers on vegetative growth of rice plants[J]. Chinese Journal of Applied Ecology, 1998, 9(1): 51-54.

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