Food quality of Ephestia eggs, the aphid Rhopalosiphum padi and mixed diet for Orius majusculus

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DOI

We studied the food quality of the aphid Rhopalosiphum padi to the pirate bug Orius majusculus using Ephestia eggs as high-quality comparison prey. Several performance parameters were tested on individuals that had been reared and maintained on each of the two single-prey diets or on a mixed diet. All fitness parameters were lower in individuals fed aphids only, indicating poor food quality of this prey. Compared with the pure Ephestia egg diet, the mixed diet enhanced teneral mass, while adult survival and female starvation tolerance were negatively affected and all other traits were unaffected. Body protein proportions were constant across diets, whereas lipid proportion was low in the aphid treatment. Preference for aphids was lower following a monotypic aphid diet than when reared on Ephestia eggs or a mixed diet. The results confirm that R. padi is low-quality food for O. majusculus as it is for other generalist predators, even though O. majusculus may contribute significantly to population suppression of the aphid.

Original languageEnglish
JournalJournal of Applied Entomology (Print)
Volume144
Issue4
Pages (from-to)251-262
ISSN0931-2048
DOIs
Publication statusPublished - May 2020

    Research areas

  • Anthocoridae, Aphididae, biological control, dietary mixing, life cycle, pest, BODY-SIZE, PREY PREFERENCE, GENERALIST PREDATORS, HEMIPTERA ANTHOCORIDAE, ALTERNATIVE PREY, THYSANOPTERA, HETEROPTERA, BIOLOGICAL-CONTROL, COLEOPTERA, REPRODUCTION

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