Feeding behaviour of young larvae of Pieris rapae crucivora (Lepidoptera: Pieridae) and its effect on parasitism by Cotesia glomerata (Hymenoptera: Braconidae)

Title:

Feeding behaviour of young larvae of Pieris rapae crucivora (Lepidoptera: Pieridae) and its effect on parasitism by Cotesia glomerata (Hymenoptera: Braconidae)

Creator:

Nakayama, Aya, Nakamura, Keiji, and Tagawa, Jun

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:eeb3d730-1ffc-46a7-bdfd-d30aa5703e48
uuid:eeb3d730-1ffc-46a7-bdfd-d30aa5703e48
issn:1210-5759
doi:10.14411/eje.2018.038

Subject:

motýli, běláskovití, blanokřídlí, lumčíkovití, larvy, parazitismus, butterflies, Pieridae, Hymenoptera, Braconidae, larvas, parasitism, Lepidoptera, Pieris rapae crucivora, cabbageworm, Cotesia glomerata, attraction, avoidance, distance, escape, feeding mark, feeding site, host searching, move, parasitoid, 2, and 59

Type:

model:article and TEXT

Format:

print, počítač, and online zdroj

Description:

We investigated the effect of the feeding behaviour of young larvae of Pieris rapae crucivora Boisduval (Pieridae) on parasitism by the parasitoid wasp, Cotesia glomerata (L.) (Braconidae). Young, 1st-3rd instar larvae used approximately three sites for feeding each day. When not feeding, they moved a short distance away from the feeding sites (= feeding marks) and rested. For first, second and third instar larvae, the distances from the new mark, made within 24 h, to larva at rest were, respectively, about 3.5 mm, 5 mm and more than 10 mm. To resume feeding, they moved back to one of the former feeding sites or a new site. The percentage of the feeding marks older than 24 h that attracted parasitoids was less than 50%. Time spent searching for hosts by a parasitoid was short. Larvae placed 5 mm or more from a feeding mark were less parasitized than the larvae placed near a mark. The number of feeding marks affected parasitism. When comparing single-marked and triple-marked leaves, the percentage parasitism of the larvae on the latter was significantly lower than that of the larvae on the former. On triple-marked leaves, parasitoids visited each mark unevenly. Accordingly, the time spent searching each mark differed significantly among the marks. Because of this confusing effect, hosts are considered to be reducing the risk of parasitism. Our results demonstrate that the feeding habits of young larvae of P. rapae crucivora are adaptive in terms of reducing the risk of parasitism by C. glomerata., Aya Nakayama, Keiji Nakamura, Jun Tagawa., and Obsahuje bibliografii

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Source:

European Journal of Entomology | 2018 Volume:115 | Number:1

Harvested from:

CDK

Metadata only:

false