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<p>This study investigates the developmental biology and age-stage specific life table parameters of <i>Apertochrysa astur</i> (Banks), a potential biocontrol agent, when it preys on the invasive coconut rugose spiralling whitefly (<i>Aleurodicus rugioperculatus</i> Martin). Under laboratory conditions, the duration of key developmental stages was recorded: egg (3.3 ± 0.61&#xa0;days), larval instars I–III (10.31 ± 1.53&#xa0;days), developmental period (13.61 ± 2.2&#xa0;days), pupal (7.3 ± 0.7&#xa0;days), and adult longevity (15.22 ± 1.48&#xa0;days). Reproductive metrics revealed a mean adult pre-oviposition period (APOP) of 6.08 ± 0.75&#xa0;days, and a total pre-oviposition period (TPOP) of 26.77 ± 0.83&#xa0;days. Maximum lifetime fecundity reached 218 ± 5.02 eggs per female, with a mean daily fecundity of 28.92 ± 1.55 eggs, indicating a strong reproductive capacity that supports the predator’s potential as a biological control agent. The net reproductive rate (R<sub>0</sub>) was 70.9, while the gross reproductive rate (GRR) was 95.24. The intrinsic rate of increase (r) was 0.14 per day, with a finite rate of increase (λ) of 1.15 per day, and a mean generation time (T) of 30.01&#xa0;days. A doubling time (DT) of 6.88&#xa0;days further confirmed rapid population growth potential. These findings suggest that <i>A. astur</i> is a highly effective and ecologically viable predator with significant potential as a biological control agent against <i>A. rugioperculatus</i> under favorable environmental conditions.</p>

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Life cycle, age and stage-specific life table parameters of green lacewing, Apertochrysa astur (Banks) (Neuroptera: Chrysopidae) fed on invasive coconut rugose spiralling whitefly, Aleurodicus rugioperculatus Martin

  • 期刊论文

  • 发表日期：

    2025年12月11日

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  • K. Elango,
  • D. Madhukrishnan,
  • S. Dharaniya,
  • B. Dhaneghesh Ram,
  • T. Karthick

摘要

This study investigates the developmental biology and age-stage specific life table parameters of Apertochrysa astur (Banks), a potential biocontrol agent, when it preys on the invasive coconut rugose spiralling whitefly (Aleurodicus rugioperculatus Martin). Under laboratory conditions, the duration of key developmental stages was recorded: egg (3.3 ± 0.61 days), larval instars I–III (10.31 ± 1.53 days), developmental period (13.61 ± 2.2 days), pupal (7.3 ± 0.7 days), and adult longevity (15.22 ± 1.48 days). Reproductive metrics revealed a mean adult pre-oviposition period (APOP) of 6.08 ± 0.75 days, and a total pre-oviposition period (TPOP) of 26.77 ± 0.83 days. Maximum lifetime fecundity reached 218 ± 5.02 eggs per female, with a mean daily fecundity of 28.92 ± 1.55 eggs, indicating a strong reproductive capacity that supports the predator’s potential as a biological control agent. The net reproductive rate (R0) was 70.9, while the gross reproductive rate (GRR) was 95.24. The intrinsic rate of increase (r) was 0.14 per day, with a finite rate of increase (λ) of 1.15 per day, and a mean generation time (T) of 30.01 days. A doubling time (DT) of 6.88 days further confirmed rapid population growth potential. These findings suggest that A. astur is a highly effective and ecologically viable predator with significant potential as a biological control agent against A. rugioperculatus under favorable environmental conditions.