Epigeal aphidophagous predators and the role of alfalfa as a reservoir of aphid predators for arable crops

Pons i Domènech, Xavier; Núñez, Eva; Lumbierres i Bardají, Belén; Albajes Garcia, Ramon

doi:https://doi.org/10.14411/eje.2005.074

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2005

Author

Pons i Domènech, Xavier

Núñez, Eva

Lumbierres i Bardají, Belén

Albajes Garcia, Ramon

Suggested citation

Pons i Domènech, Xavier; Núñez, Eva; Lumbierres i Bardají, Belén; Albajes Garcia, Ramon; . (2005) . Epigeal aphidophagous predators and the role of alfalfa as a reservoir of aphid predators for arable crops. European Journal of Entomology, 2005, vol. 102, núm. 3, p. 519-525. https://doi.org/10.14411/eje.2005.074.

Abstract

The relative occurrence and seasonal abundance of aphidophagous predators (Insecta and Arachnida) were determined in alfalfa fields at two locations in the northeast Iberian Peninsula, using D-Vac and sweep-net sampling techniques. Among the insects, Heteroptera, Dermaptera, Neuroptera, Coleoptera

and Diptera were found. The relative abundance of predators was similar at the two locations. Polyphagous predators were much more abundant than aphid specific species. Heteroptera were the most abundant order of insect predators: members of the Nabidae, Anthocoridae and Miridae were very common. Coleoptera were also abundant, represented mainly by the family Staphylinidae. Coccinellidae were less abundant and their occurrence coincided with maximum aphid presence. There was a low occurrence of other aphid-specific predators, i.e. Diptera: Syrphidae and Neuroptera: Chrysopidae. Arachnida varied between localities (from 35% to 65%). Over a five-year period, numerical responses by Orius spp., Nabis provencalis and Coccinellidae to aphids were found using polynomial regression models; however the abundance of predators was weakly explained by aphid abundance. Alfalfa, maize and winter cereals share similar aphid predator groups and these crops partially coincide in time, enabling the movement of predators among crops. The persistence of several predatory groups (Anthocoridae, Nabidae, Staphylinidae, Araneae) during most of the season suggests that alfalfa plays a major role as a reservoir of aphid predators.

URI

http://hdl.handle.net/10459.1/59221

DOI

https://doi.org/10.14411/eje.2005.074

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European Journal of Entomology, 2005, vol. 102, núm. 3, p. 519-525

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cc-by (c) Czech Academy of Sciences. Institute of Entomology of the Biology Centre, 2005

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