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Parasitoids of Lobesia botrana (Lepidoptera: Tortricidae) in the Douro Demarcated Region vineyards and the prospects for enhancing conservation biological control

Published online by Cambridge University Press:  06 May 2022

Cristina Carlos Open the ORCID record for Cristina Carlos [Opens in a new window] ,
Fátima Gonçalves ,
Claire Villemant ,
Daniel Paredes ,
Juliana Salvação  and
Laura Torres
Cristina Carlos*
Affiliation:
Association for the Development of Viticulture in the Douro Region, ADVID, Centro de Excelência da Vinha e do Vinho Bldg., Science and Technology Park of Vila Real, Régia Douro Park, 5000-033 Vila Real, Portugal Centre for the Research and Technology of Agro-Environmental and Biological Sciences, CITAB, University of Trás-os-Montes and Alto Douro, UTAD, Quinta de Prados, 5001-801 Vila Real, Portugal
Fátima Gonçalves
Affiliation:
Centre for the Research and Technology of Agro-Environmental and Biological Sciences, CITAB, University of Trás-os-Montes and Alto Douro, UTAD, Quinta de Prados, 5001-801 Vila Real, Portugal Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
Claire Villemant
Affiliation:
Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, CP50, entomologie, 45 rue Buffon, 75005 Paris, France
Daniel Paredes
Affiliation:
Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal
Juliana Salvação
Affiliation:
UTAD/ECAV – University of Trás-os-Montes and Alto Douro, School of Agrarian and Veterinary Sciences, 5001-801 Vila Real, Portugal
Laura Torres
Affiliation:
Centre for the Research and Technology of Agro-Environmental and Biological Sciences, CITAB, University of Trás-os-Montes and Alto Douro, UTAD, Quinta de Prados, 5001-801 Vila Real, Portugal
*
Author for correspondence: Cristina Carlos, Email: cristinac@utad.pt
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Abstract

The more restrictive regulations of pesticides in Europe have led to an increase in conservation biological control (CBC) research. However, little attention has been paid to the main determinants of Lobesia botrana parasitism. The Douro Demarcated Region landscape offers scope for the use of CBC. The study was conducted between 2002 and 2015 aiming at: (i) identifying parasitoids associated with L. botrana and evaluating their impact as biological control agents in each generation of the pest, and (ii) evaluating the effect of both the proportion of ecological infrastructures (EI) near the vineyards, and the impact of management practices (chemical treatments and ground cover) on the parasitism of L. botrana. A total of 3226 larvae/pupae of L. botrana were collected (15% were parasitized and 485 parasitoids emerged). A complex of 16 taxa of parasitoids was identified, the majority belonging to Hymenoptera. The most abundant were Elachertus sp. (Eulophidae), Campoplex capitator Aubert (Ichneumonidae), and Brachymeria tibialis (Walker) (Chalcididae), which represented 62.5, 12.6, and 12.0% of the total assemblage of parasitoids which emerged, respectively. The percentage of parasitism ranged from 0.0 to 61.5% (first generation), from 0.0 to 36.8% (second generation), and from 0.0 to 12.1% (third generation). Importantly, it was found that the parasitism rate was higher in vineyards with ground cover. In addition, EI in the area surrounding the vineyards produced a significant increase in parasitism. These results suggest potential for CBC of L. botrana if EI around vineyards, and ground cover with native perennial plants within vineyards, are encouraged.

Keywords

Conservation biological controlecological infrastructuresElachertus spground coverlandscape
Type
Research Paper
Information
Bulletin of Entomological Research , Volume 112 , Issue 5 , October 2022 , pp. 697 - 706
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Copyright © The Author(s), 2022. Published by Cambridge University Press

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