Cues of intraguild predators (Harmonia axyridis) and different temperatures alter foraging and oviposition strategies of the parasitoid Aphidius gifuensis

• Published in: Journal of Asia-Pacific entomology Vol. 26; no. 2; pp. 102044 - 6
• Main Authors: Yu, Xing-Lin, Feng, Yi, Liu, Tong-Xian, Qiu, Bao-Li
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2023; 한국응용곤충학회
• Subjects: Aphidius gifuensis; Harmonia axyridis; Intraguild predation; Predator cues; Temperature; 농학; Harmonia axyridis; Temperature; Predator cues; Aphidius gifuensis; Intraguild predation
• ISSN: 1226-8615; 1876-7990
• DOI: 10.1016/j.aspen.2023.102044

[Display omitted] •• Harmonia axyridis cues did not affect A. gifuensis foraging behaviors.•• Harmonia axyridis cues reduced the number of A. gifuensis larvae.•• Rising temperatures increased the behavioral frequency and oviposition of parasitoid.•• As temperature increased, A. gifuensis outpaced the impacts exerted by predator cues. Organisms live in complex systems where they simultaneously balance responses to multiple factors. Insects are dealing with indirect pressures from predators under the influence of temperature. Currently, little is known about how they balance these factors. Under laboratory conditions, we investigated the effects of the predator Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) cues and temperature (23, 28, and 33 °C) on the foraging and oviposition behavior of the parasitoid Aphidius gifuensis Ashmead (Hymenoptera: Braconidae) using the aphid Myzus persicae (Sulzer) (Hemiptera: Aphididae) as a host. In all trials, the frequency and duration of stinging, walking, or stationary behavior of A. gifuensis were not influenced by H. axyridis cues. However, in trials with predator cues, A. gifuensis produced less offspring than trials without predator cues. On the other hand, the frequency of A. gifuensis stinging, walking, or stationary behavior, and the number of A. gifuensis larvae increased with rising temperature. Specially, when the predator cues were present, parasitoid responded to rising temperatures by increasing frequency of each behavior and an increase in offspring number. Our findings indicate that A. gifuensis might show flexible foraging and oviposition behavior in response to H. axyridis associated cues and different temperatures. Thus, the effects of both temperature and H. axyridis cues should be considered when assessing the foraging outcomes of A. gifuensis prior to combining these two enemies in aphid management practice.