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<p>In Peru, the cacao crop (<i>Theobroma cacao</i> L.) is crucial for over 90,000 farmers. However, it faces threats from pathogenic fungi and pests, including invasive xylophagous insects. This study aims to identify two species of borers that are associated with the mortality of young cacao plants in the Peruvian Amazon region. The results report the first observation of <i>Coptoborus ricini</i> (Scolytinae) and <i>Euplatypus parallelus</i> (Platypodinae) as borers of young cacao plants. Both species were identified through morphological analyses using scanning electron microscopy (SEM) and molecular analyses. For <i>C. ricini</i>, the genetic similarity to other sequences was 85.76%, confirming its identity using morphological keys. For <i>E. parallelus</i>, genetic identity was 99.25%, which was also supported by morphological characteristics. These findings underscore the importance of monitoring emerging wood-boring pests in Peru, as these species had not previously been associated with the mortality of cacao plants. The results provide diagnostic characteristics and reference sequences for future research and cacao pest management.</p>

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Coptoborus ricini and Euplatypus parallelus (Curculionidae: Scolytinae, Platypodinae) associated with cacao plant mortality in Amazonas, Peru

  • 期刊论文

  • 发表日期：

    2026年5月12日

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  • Jherson Rojas-Vargas,
  • Manuel A. Hernández-May,
  • Manuel Oliva-Cruz,
  • Angel F. Huaman-Pilco

摘要

In Peru, the cacao crop (Theobroma cacao L.) is crucial for over 90,000 farmers. However, it faces threats from pathogenic fungi and pests, including invasive xylophagous insects. This study aims to identify two species of borers that are associated with the mortality of young cacao plants in the Peruvian Amazon region. The results report the first observation of Coptoborus ricini (Scolytinae) and Euplatypus parallelus (Platypodinae) as borers of young cacao plants. Both species were identified through morphological analyses using scanning electron microscopy (SEM) and molecular analyses. For C. ricini, the genetic similarity to other sequences was 85.76%, confirming its identity using morphological keys. For E. parallelus, genetic identity was 99.25%, which was also supported by morphological characteristics. These findings underscore the importance of monitoring emerging wood-boring pests in Peru, as these species had not previously been associated with the mortality of cacao plants. The results provide diagnostic characteristics and reference sequences for future research and cacao pest management.