Communication Dans Un Congrès Année : 2023

Study of the winter ecology of Palomena prasina (L.) (Hemiptera: Pentatomidae) in a perspective of Integrated Pest Management

Résumé

P. prasina, the green shield bug (GSB), is widely distributed in the Palearctic region. In the Southwest of France it is considered a serious pest of hazelnuts, its feeding punctures leading to blank nuts and kernel necrosis, causing heavy losses in commercial orchards. To date, there is no Integrated Pest Management strategy available to control P. prasina. Pest control strategies often focus on the Spring- Summer ecology of pests, when these are in-field or in the vicinity of crops. However, the abundance of pest populations in crops is also related to the Autumn-Winter ecology of pests. Therefore, to find new opportunities for pest control, there is a need to beter account for the overall temporal and landscape ecology of pests. In the present work, we focused on the Autumn-Winter ecology of P. prasina to investigate i) where P. prasina overwinters, ii) if it aggregates in the overwintering sites, and iii) if it mates while overwintering. Samples were collected in different habitats (forests, hedges, orchards, houses) and microhabitats (liter, bushes/trees, dead trees, human made structures), in two years. The reproductive status of GBS individuals was monitored in Winter and when they emerged from overwintering sites, in Spring. Our results show that P. prasina adults overwinter individually in the liter of crop and natural habitats, and only mate after leaving the overwintering sites. The abundance of GSB in those sites is negatively correlated to liter temperature and postively to humidity levels. We discuss these results in a perspective of IPM.

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Dates et versions

hal-05003816 , version 1 (24-03-2025)

Identifiants

  • HAL Id : hal-05003816 , version 1

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Laetitia Driss, Rachid Hamidi, Christophe Andalo, Alexandra Magro. Study of the winter ecology of Palomena prasina (L.) (Hemiptera: Pentatomidae) in a perspective of Integrated Pest Management. XII European Congress of Entomology, Hellenic Entomological Society, Oct 2023, Heraklion (Crete Island), Greece. ⟨hal-05003816⟩
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