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- Title
Population trends and damage patterns of Hypsipyla grandella (Lepidoptera: Pyralidae) in a mahogany stand, in Turrialba, Costa Rica.
- Authors
Taveras, Rosina; Hilje, Luko; Hanson, Paul; Mexzón, Ramón; Carballo, Manuel; Navarro, Carlos
- Abstract
1 Population trends of Hypsipyla grandella and their relationship with abiotic (humidity, precipitation and temperature) and biotic factors (availability of mahogany shoots and natural mortality agents), as well as damage patterns, were studied for 16 months in Turrialba, Costa Rica. 2 Hypsipyla grandella was active in the field all year round, and its population density was influenced by temperature, availability of new shoots and natural mortality agents. 3 It was possible to predict four population peaks, which appeared approximately every 1881 degree-days. 4 Even though H. grandella larvae mainly attack shoots, they also fed on the bark of the bole, especially when green shoots were scarce. 5 Four parasitoid species were recorded ( Bracon c. chontalensis, Brachymeria c. c onica, Apanteles sp. and Dolichogenidea sp.) but their impact on H. grandella abundance was negligible.
- Subjects
TURRIALBA (Costa Rica); COSTA Rica; INSECT populations; POPULATION density; MAHOGANY; PARASITOIDS
- Publication
Agricultural & Forest Entomology, 2004, Vol 6, Issue 2, p89
- ISSN
1461-9555
- Publication type
Article
- DOI
10.1111/j.1461-9555.2004.00205.x