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Effects of Bt Rice with cry1C and cry2A on the Ecological Generation Fitness of Rice Brown Planthoppers(Nilaparvata lugens) and Whitebacked Planthoppers (Sogatella furcifera) at Various Nitrogen Rates

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  • 1Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
    2College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China
*Corresponding author, E-mail: luzxmh2004@aliyun.com

Received date: 2015-06-01

  Revised date: 2015-12-18

  Online published: 2016-03-10

Abstract

In order to evaluate the effects of Bt rice on the generation fitness of non-target pest at different nitrogen rates, as wall as the potential impact of Bt rice and nitrogen fertilizer levels on non-target pest, the brown plantthopper (BPH) (Nilaparvata lugens) and the whitebacked planthopper (WBPH) (Sogatella furcifera), were successively cultured for four generations on Bt rice, T1C-19 with cry1C and T2A-1 with cry2A , and their parental rice Minghui 63, at nitrogen rates of 0, 100 and 250 kg/hm2. The results indicated that the ecological fitness of the BPH and WBPH was increased with the increasing nitrogen fertilizer level, including shortened nymph developmental duration, enhanced fecundity, prolonged longevity, increased nymph survival rate, female weight, egg hatchability and population growth rate. There were significant differences in rice planthopper nymphal development duration, body weight of female adult, fecundity and population growth rate for four successive generations under different nitrogen rates. Transgenic Bt rice, T1C-19 and T2A-1, had no significant effect on the fitness of BPH and WBPH at the same generations and nitrogen rates, except the BPH fecundity. BPH fecundity on transgenic Bt rice T1C-19 at the nitrogen levels of 100 kg/hm2 and 250 kg/hm2(N) was lower compared with the transgenic Bt rice T2A-1 and its parent Minghui 63 from the first generation to the third generation, but no significant difference was found among varieties at the fourth generation at three nitrogen rates. No significant difference was found on the fitness of BPH and WBPH with the generation increase, between non-transgenic Bt rice and transgenic Bt rice. Therefore, the present study demonstrated that nitrogen fertilizer levels exerted a significant influence on the ecological fitness of the rice planthoppers with the generation increase, while transgenic Bt rice didn't.

Cite this article

Kai LIU, Ya-jun YANG, Jun-ce TIAN, Yan-hui LU, Hong-xing XU, Xu-song ZHENG, Zhong-xian LV . Effects of Bt Rice with cry1C and cry2A on the Ecological Generation Fitness of Rice Brown Planthoppers(Nilaparvata lugens) and Whitebacked Planthoppers (Sogatella furcifera) at Various Nitrogen Rates[J]. Chinese Journal OF Rice Science, 2016 , 30(2) : 200 -209 . DOI: 10.16819/j.1001-7216.2016.5090

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