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RNA Interference in the Egg Parasitoid, Trichogramma dendrolimi Matsumura
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[Control efficacy of Trichogramma japonicum against Chilo suppressalis and Chilaraea auricilia].

Hong-Fan Chen1, Shou-Shan Huang, Yu-Zhu Zhang

  • 1Laboratory of Insect Ecology, South China Agricultural University, Guangzhou 510642, China. hongfan211@sohu.com

Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|June 22, 2010
PubMed
Summary

The egg parasitoid Trichogramma japonicum effectively controls rice borers Chilo suppressalis and Chilaraea auricilia. Life table analysis confirms its high parasitism capacity and rapid generation, indicating strong biocontrol potential.

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Area of Science:

  • Agricultural Entomology
  • Biological Control
  • Insect Ecology

Context:

  • Rice production is threatened by stem borers like Chilo suppressalis and Chilaraea auricilia.
  • Effective and sustainable pest management strategies are crucial for rice cultivation.
  • Biological control agents offer an environmentally friendly alternative to chemical pesticides.

Purpose:

  • To assess the population increase capacities of Trichogramma japonicum in relation to two major rice borers.
  • To evaluate the control efficacy of T. japonicum against Chilo suppressalis and Chilaraea auricilia.
  • To estimate the fecundity and parasitism capacity of T. japonicum on these rice borer hosts.

Summary:

  • Life table methods were used to construct population life tables for C. suppressalis and C. auricilia, and fecundity tables for T. japonicum on these hosts.
  • The generation period (T) for C. suppressalis and C. auricilia was 56.40 and 47.80 days, with intrinsic rates of natural increase (r(m)) of 0.0489 and 0.072.
  • For T. japonicum, the generation period (T) on C. suppressalis and C. auricilia was approximately 9.75-9.78 days, with significantly higher r(m) values of 0.3154 and 0.3161, respectively.

Impact:

  • The study demonstrates that T. japonicum possesses a high capacity for population increase and rapid generation turnover.
  • These findings indicate that T. japonicum is a highly effective biological control agent against C. suppressalis and C. auricilia.
  • The results support the use of T. japonicum for integrated pest management programs in rice ecosystems.