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Updated: Nov 1, 2025

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Host utilization by the pepper weevil (Anthonomus eugenii): suitability, preference and offspring performance.

D Catalina Fernández1,2, Sherah L VanLaerhoven2, Roselyne Labbé1

  • 1Agriculture and Agri-Food Canada, Harrow Research and Development Centre, Harrow, ON, Canada.

Pest Management Science
|June 17, 2021
PubMed
Summary

Pepper weevils develop faster on some wild nightshade species than cultivated peppers. High capsaicin content in habanero peppers limits pepper weevil offspring emergence, aiding pest management strategies.

Keywords:
Capsicumcapsaicincapsaicinoidshost adaptationhost usepepper crops

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Area of Science:

  • Entomology
  • Plant-insect interactions
  • Pest management

Background:

  • Host plant selection is critical for insect pest survival and spread.
  • The pepper weevil rapidly expands its range by utilizing various Solanaceous host plants.
  • Understanding pepper weevil host use is vital for effective pest management.

Purpose of the Study:

  • To assess pepper weevil oviposition preference, development time, and offspring emergence on wild Solanaceous species and cultivated pepper cultivars.
  • To identify factors influencing pepper weevil bionomics and host suitability.
  • To inform integrated pest management strategies for pepper weevils.

Main Methods:

  • Evaluated pepper weevil oviposition on various Solanaceous fruit.
  • Measured pepper weevil development time within different host fruits.
  • Quantified successful offspring emergence from tested host plants.

Main Results:

  • Pepper weevils developed successfully on eastern black nightshade and climbing nightshade, with development 4 days faster than on jalapeno peppers.
  • Oviposition occurred across all tested fruit types, with no strong host preference observed.
  • Significantly fewer offspring emerged from habanero peppers compared to oviposition events, indicating reduced tolerance to high capsaicin.

Conclusions:

  • Certain nightshade species support faster pepper weevil development than cultivated peppers.
  • High capsaicin concentration in habanero peppers limits pepper weevil reproduction.
  • Findings provide insights into pepper weevil host range and inform management strategies.