Effects of elevated CO2 and spinetoram on the population fitness and detoxification enzymes activities in Frankliniella occidentalis and F. intonsa
文献类型: 外文期刊
第一作者: Fan, Zongfang
作者: Fan, Zongfang;Chen, Yaping;Fan, Rui;Chen, Bin;Gui, Furong;Fan, Zongfang;Qian, Lei
作者机构:
关键词: Elevated CO2; Frankliniella occidentalis; Frankliniella intonsa; Spinetoram; Population fitness; Detoxification activities
期刊名称:JOURNAL OF PEST SCIENCE ( 影响因子:4.8; 五年影响因子:5.0 )
ISSN: 1612-4758
年卷期: 2023 年
页码:
收录情况: SCI
摘要: Herbivore performance can be impacted by elevated CO2 or insecticides. However, there is insufficient data on how invasive and native species are affected by these dual stresses. Frankliniella occidentalis and F. intonsa are economically important pests. We evaluated the direct effects of elevated CO2 on the sensitivity of thrips to spinetoram, and recorded their population fitness, as well as measured acetylcholinesterase (AChE) and cytochrome P450 (CYP450) activities in adults under short-term (3rd generation) and long-term (30th generation) exposures to these two stresses. Thrips' resistance to spinetoram was accelerated by elevated CO2, and was strongly displayed by F. occidentalis than by F. intonsa. In the 3rd generation, exposure to the two stresses significantly prolonged the longevity of adult F. occidentalis and increased its fecundity, sex ratio, and net reproductive rate (R0), whereas they only increased the fecundity of F. intonsa. Notably, the sex ratio of the former (2.15 +/- 0.35) was significantly higher than that of the latter (0.65 +/- 0.03). On the other hand, CYP450 activity in F. occidentalis was significantly lower than that of control. At the 30th generation, exposure to the two stresses reduced the population fitness of the two species. Additionally, the fecundity, sex ratio, R0, intrinsic rate of increase (r), and finite rate of increase (lambda) of F. occidentalis were significantly higher than that of F. intonsa. Besides, AChE activities in both species were significantly lower than that of the control. We concluded that increased CO2 and spinetoram may hasten the displacement of the native species, F. intonsa by the invasive species, F. occidentalis in the future.
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