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Population trends and damage patterns of Hypsipyla grandella (Lepidoptera: Pyralidae) in a mahogany stand, in Turrialba, Costa Rica
Author(s) -
Taveras Rosina,
Hilje Luko,
Hanson Paul,
Mexzón Ramón,
Carballo Manuel,
Navarro Carlos
Publication year - 2004
Publication title -
agricultural and forest entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.755
H-Index - 55
eISSN - 1461-9563
pISSN - 1461-9555
DOI - 10.1111/j.1461-9555.2004.00205.x
Subject(s) - biology , pyralidae , lepidoptera genitalia , abiotic component , shoot , population , bark (sound) , apanteles , horticulture , botany , population density , parasitoid , ecology , larva , braconidae , demography , sociology
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.