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<p>The predatory stink bug, <i>Eocanthecona furcellata</i> (Wolff) (Heteroptera: Pentatomidae), is a polyphagous insect predator that targets multiple species of Lepidoptera larvae. While its potential as a biological control agent in integrated pest management (IPM) programs has been recognized, the optimal conditions for its mass rearing remain unknown. This study therefore investigates the effects of temperature on development, fecundity, life-table parameters, and predation capability of <i>E. furcellata</i> when fed on <i>Spodoptera litura</i> Fab. (Lepidoptera: Noctuidae) across six constant temperatures (20, 23, 26, 29, 32, and 35&#xa0;°C) in a laboratory setting. The results showed that the development rate of <i>E. furcellata</i> significantly increased with rising temperatures from 20&#xa0;°C to 35&#xa0;°C. However, the duration of the pre-oviposition, oviposition period, and adult longevity decreased significantly with increasing temperatures. The longest longevity was recorded at 20&#xa0;°C, with females living an average of 36.72&#xa0;days and male 35.43&#xa0;days, while the shortest longevity was observed at 35&#xa0;°C, with females living, 14.27&#xa0;days and males 13.07&#xa0;days. Fecundity and hatchability peaked at 29&#xa0;°C, with values of 271.47 eggs and 99.82%, respectively. Across the temperature range of 20&#xa0;°C to 35&#xa0;°C, the net reproductive rate (<i>R</i><sub><i>0</i></sub>) and the intrinsic rate of natural increase (r<sub>m</sub>) of <i>E. furcellata</i> were affected, with the mean generation time (T) decreasing linearly. The highest values of <i>R</i><sub><i>0</i></sub> (77.88), r<sub>m</sub> (0.1223), and the lowest doubling time (DT) (5.6676&#xa0;days) were all recorded at 29&#xa0;°C. Additionally, the predation efficiency of <i>E. furcellata</i> followed the Holling II functional response model, with optimal predation observed at 29&#xa0;°C. In conclusion, temperature has a significant impact on the development, longevity, fecundity, life-table parameters, and predation of <i>E. furcellata</i>. The optimal temperature for population growth and biological efficacy of <i>E. furcellata</i> is 29&#xa0;°C. These findings provide essential insights for optimizing mass rearing techniques and enhancing the use of <i>E. furcellata</i> as a biocontrol agent in IPM programs, addressing the previously unknown optimal temperature.</p>

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Influence of temperature on development, life table parameters, and predation of the predatory stink bug, Eocanthecona furcellata (Wolff) (Heteroptera: Pentatomidae)

  • 期刊论文

  • 发表日期：

    2025年9月12日

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  • Zhiqi Peng,
  • Xiaoying Zhang,
  • Fanchao Meng,
  • Yugan Zhao,
  • Jidong Xian

摘要

The predatory stink bug, Eocanthecona furcellata (Wolff) (Heteroptera: Pentatomidae), is a polyphagous insect predator that targets multiple species of Lepidoptera larvae. While its potential as a biological control agent in integrated pest management (IPM) programs has been recognized, the optimal conditions for its mass rearing remain unknown. This study therefore investigates the effects of temperature on development, fecundity, life-table parameters, and predation capability of E. furcellata when fed on Spodoptera litura Fab. (Lepidoptera: Noctuidae) across six constant temperatures (20, 23, 26, 29, 32, and 35 °C) in a laboratory setting. The results showed that the development rate of E. furcellata significantly increased with rising temperatures from 20 °C to 35 °C. However, the duration of the pre-oviposition, oviposition period, and adult longevity decreased significantly with increasing temperatures. The longest longevity was recorded at 20 °C, with females living an average of 36.72 days and male 35.43 days, while the shortest longevity was observed at 35 °C, with females living, 14.27 days and males 13.07 days. Fecundity and hatchability peaked at 29 °C, with values of 271.47 eggs and 99.82%, respectively. Across the temperature range of 20 °C to 35 °C, the net reproductive rate (R0) and the intrinsic rate of natural increase (rm) of E. furcellata were affected, with the mean generation time (T) decreasing linearly. The highest values of R0 (77.88), rm (0.1223), and the lowest doubling time (DT) (5.6676 days) were all recorded at 29 °C. Additionally, the predation efficiency of E. furcellata followed the Holling II functional response model, with optimal predation observed at 29 °C. In conclusion, temperature has a significant impact on the development, longevity, fecundity, life-table parameters, and predation of E. furcellata. The optimal temperature for population growth and biological efficacy of E. furcellata is 29 °C. These findings provide essential insights for optimizing mass rearing techniques and enhancing the use of E. furcellata as a biocontrol agent in IPM programs, addressing the previously unknown optimal temperature.