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- Title
Interaction between Apanteles ruficrus Hal. and Meteorus rubens Nees on larvae on Agrotis ipsilon (Hufn.).
- Authors
Awadallah, K. T.; Zaki, F. N.; Gesraha, M. A.
- Abstract
The two internal gregarious parasitoids Apanteles ruficrus Hal. and Meteorus rubens Nees attack larvae of Agrotis ipsilon (Hufn.) and they naturally co-exist during the period from end April to end May. The present paper deals with the interaction between these two parasitoids. First and late 6th instar (3-day old) of A. ipsilon never attacked by either A. ruficrus or M. rubens. No sort of direct competition between the two parasitoids existed around 2nd, 3rd and early 6th instars, because of the unique instar attacked by each. Fourth instar larva is adequate for both parasitic species, but when being exposed simultaneously to females of both species, no progeny are obtained owing to the early death of the host. Fifth instar of Agrotis larva is highly preferable for Meteorus compared to Apanteles and thus, when being exposed simultaneously, the survivor is Meteorus. In nature the two parasitic species were never obtained together from a 4th instar larva, and no Apanteles individuals were secured from 5th instar larvae.
- Subjects
APANTELES; BLACK cutworm; LARVAE; PARASITOIDS; COEXISTENCE of species; COMPETITION (Biology); HOST-parasite relationships
- Publication
Journal of Applied Entomology, 1995, Vol 119, Issue 1-5, p625
- ISSN
0931-2048
- Publication type
Article
- DOI
10.1111/j.1439-0418.1995.tb01347.x