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<p><i>Maruca vitrata</i> (Fabricius) (Lepidoptera: Crambidae), commonly referred to as the cowpea pod borer, poses a significant threat to cowpea production in Burkina Faso with yield losses exceeding 80%. Despite substantial importance, management options, especially eco-friendly measures, are limited. Even though, the parasitoid <i>Liragathis javana</i> (Bhat &amp; Gupa) (Hymenoptera: Braconidae) has been used as a biological control agent against <i>M. vitrata</i> larvae, some of success, little is known about the biological factors influencing their interaction. In this study, the effect of female age, intraspecific competition (1, 2, 4, 6 pairs), and larval density of <i>M. vitrata</i> (10, 15, 20, 25, 30) on the fertility and development of <i>L. javana</i> was evaluated in the laboratory. Results show that parasitism of <i>M. vitrata</i> larvae by <i>L. javana</i> females was influenced by the age of the parasitoid, the density of <i>L. javana</i> females and the larval density of <i>M. vitrata</i>. Females aged 48 h were effective at parasitizing <i>M. vitrata</i> larvae, with a parasitism rate of 54%. In addition, when four <i>L. javana</i> females were exposed to <i>M. vitrata</i> larvae I, parasitism (50%) and emergence (62%) rates were significantly higher than those of the other densities. An increase in the larval density of <i>M. vitrata</i> led to a gradual decrease in the parasitism rate of <i>L. javana</i> females. The sex ratio of the emerging <i>L. javana</i> population was generally female-biased. Biological programs involving <i>L. javana</i> against <i>M. vitrata</i> should consider the impact of female age, parasitoid density and host larvae on the biological parameters of the parasitoid.</p>

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Assessment of the biocontrol potential of Liragathis javana (Bhat & Gupta) (Hymenoptera: Braconidae) against Maruca vitrata (Fabricius) (Lepidoptera: Crambidae) in Burkina Faso

  • 期刊论文

  • 发表日期：

    2026年6月22日

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  • Elsa Nassira Zongo,
  • Adama Kabore,
  • Patoingnimba Carine Ouédraogo,
  • Fousséni Traoré,
  • Aboubacar Boly,
  • Edouard Drabo,
  • Djibril Aboubakar Souna,
  • Antoine Waongo,
  • Benjamin Dossa Datinon,
  • Ramasamy Srinivasan,
  • Barry Robert Pittendrigh,
  • Manuele Tamò

摘要

Maruca vitrata (Fabricius) (Lepidoptera: Crambidae), commonly referred to as the cowpea pod borer, poses a significant threat to cowpea production in Burkina Faso with yield losses exceeding 80%. Despite substantial importance, management options, especially eco-friendly measures, are limited. Even though, the parasitoid Liragathis javana (Bhat & Gupa) (Hymenoptera: Braconidae) has been used as a biological control agent against M. vitrata larvae, some of success, little is known about the biological factors influencing their interaction. In this study, the effect of female age, intraspecific competition (1, 2, 4, 6 pairs), and larval density of M. vitrata (10, 15, 20, 25, 30) on the fertility and development of L. javana was evaluated in the laboratory. Results show that parasitism of M. vitrata larvae by L. javana females was influenced by the age of the parasitoid, the density of L. javana females and the larval density of M. vitrata. Females aged 48 h were effective at parasitizing M. vitrata larvae, with a parasitism rate of 54%. In addition, when four L. javana females were exposed to M. vitrata larvae I, parasitism (50%) and emergence (62%) rates were significantly higher than those of the other densities. An increase in the larval density of M. vitrata led to a gradual decrease in the parasitism rate of L. javana females. The sex ratio of the emerging L. javana population was generally female-biased. Biological programs involving L. javana against M. vitrata should consider the impact of female age, parasitoid density and host larvae on the biological parameters of the parasitoid.