Local factors have a greater influence on the abundance of alfalfa weevil and its larval parasitoids than landscape complexity in heterogeneous landscapes

Author:

Levi-Mourao AlexandreORCID,Meseguer RobertoORCID,Madeira FilipeORCID,Martinez-Casasnovas José AntonioORCID,Costamagna Alejandro C.ORCID,Pons XavierORCID

Abstract

Abstract Context The alfalfa weevil Hypera postica Gyllenhal (Coleoptera: Curculionidae) is one of the most destructive pests of alfalfa worldwide. Both local and landscape-scale factors can significantly influence crop pests, natural enemies, and the effectiveness of biological control services, but the relative influence of these factors is unclear. Objectives We investigated the influence of the local variables and surrounding landscape composition and configuration on the abundance of alfalfa weevil, and on the abundance and parasitism rates of its larval parasitoids, Bathyplectes spp. Methods We sampled 65 commercial alfalfa fields along the Ebro Basin, Spain, over a period of 3 years, recording the field characteristics and landscape structure at three buffer radii of 250, 500 and 1000 m from the center of each field. Results The abundance of weevil larvae was positively associated with the field perimeter and with the uncut alfalfa surrounding the pipes of the sprinkler irrigation system, but only one configuration variable was positively correlated: the alfalfa edge density. No local characteristics or landscape structures were associated with the abundance of adult weevils. The abundance of Bathyplectes spp. adults was positively associated to local factors such as the densities of alfalfa weevils and aphids. Few landscape structure variables, such as alfalfa edge density and Simpson’s Diversity Index, had explanatory value only at 250 m buffer radius. The rate of larval parasitism was affected by local variables, such as alfalfa weevil abundance and field age. Conclusion Our results provide, for the first time in the Mediterranean region and Europe, evidence of the relative importance of landscape structure and local factors on the abundance of the alfalfa weevil and its larval parasitoids, Bathyplectes spp. The strongest influences were based on local characteristics.

Funder

Ministerio de Ciencia e Innovación

Fundação para a Ciência e a Tecnologia

Universitat de Lleida

Publisher

Springer Science and Business Media LLC

Reference97 articles.

1. Al Ayedh HY, Kondratieff BC, Blodgett SL, Peairs FB (1996) Evaluation of hymenopterous biological control agents of the alfalfa weevil larvae Hypera postica (Coleoptera: Curculionidae) in Northcentral Colorado. J Kans Entomol 69:326–336

2. Albajes R, Pons X, Cantero-Martínez C, Achón MA, López C, Eizaguirre M (2022) Intensificación de las rotaciones de cereales en la Cuenca del Ebro: efecto en la incidencia de plagas y virosis. Phytoma España 335:36–42

3. Alfaro A (2005) Entomología Agraria. Los parásitos animales de las plantas cultivadas. Publicaciones de la Excma, Diputación de Soria

4. Bartoń K (2020) MuMIn: title multi-model inference. R package version: 1.43.6. MuMIn.pdf (r-project.org)

5. Bates D, Maechler M, Bolker B, Walker S (2015) Fitting linear mixed-effects models using Lme4. J Stat Softw 67:1–48

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