Adaptation of Sogatella furcifera to insect-resistant rice variety N22

Abstract

Abstract: The adaptation of whitebacked planthopper (WBPH) Sogatella furcifera to insect-resistant rice variety N₂₂ and the variation of its protective enzyme were studied by rearing it successively two generations on N₂₂ and insect-susceptible rice variety TN₁ in laboratory. The results showed that after reared on TN₁ or N₂₂ for one or two generations, its egg period, nymphal duration, and total generation period had no significant difference. The ecological parameters, e.g., nymphal survival rate, body weight, amount of honey dew, egg number, and innate increasing rate of WBPH transferred from TN₁ to N₂₂ and reared for one generation were lower than those of WBPH reared on N₂₂ successively for two generations, and the latter was lower than that reared on TN₁. The activities of superoxide dismutase (SOD) and catalase (CAT) in protective enzyme system of the 2nd generation WBPHon N₂₂ were similar to those of the pest on TN₁, indicating that S. furcifera could adapt to insect-resistant variety N₂₂ after rearing it successively for several generations.

Key words: Sogatella furcifera, Insect-resistant rice varieties N₂₂, Ecological adaptation, Activities of protective enzymes

CLC Number:

S435.112

CHEN Jianming, YU Xiaoping, LU Zhongxian, TAO linyong, ZHENG Xusong, XU Hongxing, CHENG Jia'an . Adaptation of Sogatella furcifera to insect-resistant rice variety N₂₂[J]. Chinese Journal of Applied Ecology, 2003, (11): 1939-1942.

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Adaptation of Sogatella furcifera to insect-resistant rice variety N₂₂

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