Biological Traits Of The Pincer Wasp Gonatopus Flavifemur (Esaki & Hashimoto) Associated With Different Stages Of Its Host, The Brown Planthopper, Nilaparvata Lugens (Stal)
文献类型: 外文期刊
作者: He, JC; He, YT; Lai, FX; Chen, XS; Fu, Q
作者机构:
关键词: Gonatopus Flavifemur; Nilaparvata Lugens; Host Stage; Parasitism; Host Feeding; Development
期刊名称: INSECTS
ISSN:
年卷期: 2020 年 11 卷 5 期
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收录情况: JCR(2021版)
摘要: Gonatopus flavifemur (Esaki & Hashimoto) is a common parasitoid of the most important rice pest, the brown planthopper (BPH) Nilaparvata lugens (Stal), in eastern and southeastern Asia. We investigated the parasitism rates, feeding rates, and offspring development of G. flavifemur in association with five instars of BPH nymphs and male and female adults under laboratory conditions (27 +/- 1 degrees C and 70 +/- 5% Relative Humidity). The results showed that the life stage of the host significantly affects parasitism, host feeding, and offspring development by G. flavifemur. The parasitism rate was highest on 4th instar nymphs, and the feeding rate was highest on 1st instar nymphs. The cocooning rate on male adult BPHs was significantly lower than that on other stages; however, emergence rates did not significantly differ among the BPH stages. The rate of female offspring upon emergence from 5th instars was higher than other stages. Both the parasitism and host-feeding functional responses of G. flavifemur to different BPH stages fit well with Holling type II models, supporting the results of parasitism and feeding rates and indicating that G. flavifemur would be a good agent for BPH control. In conclusion, G. flavifemur prefers to feed on young nymphs but prefers to parasitize older nymphs. In addition, 5th instar nymphs are favorable to female offspring of the pincer wasp.
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