Journal
EUROPEAN JOURNAL OF ENTOMOLOGY
Volume 97, Issue 4, Pages 559-562Publisher
CZECH ACAD SCI, INST ENTOMOLOGY
DOI: 10.14411/eje.2000.087
Keywords
Adalia bipunctata; Coccinella septempunctata; Coccinellidae; ladybird beetles; intraguild predation on eggs; costs; larval development; survival; alkaloids
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Coccinella septempunctata was approximately 20% more reluctant to eat the eggs of Adalia bipunctata than the reverse. In addition, fourth instar larvae of C. septempunctata failed to complete their development on a diet of A. bipunctata eggs and only 30% of those of A. bipunctata completed their development on a diet of C. septempunctata eggs, and the survivors took nearly 2 times as long as those fed aphids. This is an indication that the costs of intraguild predation might outweigh the benefits.
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