Insects (2023) 14 (2 - 156)

Agnès Salat-Moltó, Berta Caballero-López, Nicolás Pérez-Hidalgo, José M. Michelena, Mar Ferrer Suay, Emilio Guerrieri and José M. Blanco-Moreno (2023)
Not all field margins are equally useful: Effects of the vegetation structure of margins on cereal aphids and their natural enemies
Insects 14 (2 - 156)
Abstract: Differences in the semi-natural vegetation of field margins will affect the biological control services derived from the presence of these semi-natural habitats adjacent to fields. Of the plant functional traits that are most relevant for insects, plant life forms reflect different aspects of plant structure and functioning that can help predict the value of marginal vegetation for arthropods in agricultural systems. The aim of this study was to determine the effect of the vegetation structure of field margins on cereal aphids and on some of their natural enemies (parasitoids, hoverflies and ladybugs) in terms of plant life forms. We characterized margin vegetation using the relative cover of each life form and sampled insects in crops along transects parallel to field margins. Our results show that in the studied areas, the abundance of natural enemies was greater near margins dominated by annual plants than in margins dominated by perennial plants. On the other hand, the abundances of aphids and parasitism rates were higher near margins dominated by perennial woody plants than near margins dominated by perennial herbaceous plants. By promoting specific life forms in existing margins, farmers can enhance the conservation biological control and relieve aphid pressure on their crops.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Full text of article
Database assignments for author(s): Berta Caballero-López, Emilio Guerrieri, José Manuel Blanco-Moreno

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Sitobion avenae	Barley (Hordeum vulgare)	Spain (continental)
	Sitobion avenae	Wheat (Triticum)	Spain (continental)