Impact of mixed damage of Nilaparvata lugens and Sogatella furcifera on vegetative growth of rice plants

Abstract

Abstract: Studies on the impact of feeding damage of mixed populations of Nilaparvata lugens and Sogatella furcifera on vegetative growth of rice plants show that the dry weight of the adults of two planthoppers and the leaf area of rice plants and their shoot dry weight were decreased with increasing nymph density, and the range of the variations was related with interspecific proportion in quantity. The ratio of dry weight to leaf area of rice plants was increased with increasing damage. Avery significant linear relationship was observed between the total dry weight of the mixed populations(X) and the loss of shoot dry weight of rice plants(Y) in three treatments (1:3,2:2,3:1) of quantitative proportion of N.lugens to S.furcifera, which is Y=67.17+30.43X, Y=172.48+36.51X and Y=87.59+37.67X, and relevant b values were 30.43, 36.51 and 37.67, respectively.

Key words: Rice, Nilaparvata lugens, Sogatella furcifera, Mixed populations, Infestation, soil texture, water stable aggregate, organic carbon, total phosphorus, total nitrogen, stoichiometric ratio

Wang Rongfu, Cheng Xianian, Zou Yunding. Impact of mixed damage of Nilaparvata lugens and Sogatella furcifera on vegetative growth of rice plants[J]. Chinese Journal of Applied Ecology, 1998, 9(2): 181-185.

References

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