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Permanent link (DOI): https://doi.org/10.7939/R3X63BC8C

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Biology of Caloptilia fraxinella (Lepidoptera: Gracillariidae) on ornamental green ash, Fraxinus pennsylvanica (Oleaceae) Open Access

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Author or creator
Evenden, M. L.
Additional contributors
Subject/Keyword
Oak quercus-dentata
Cameraria-hamadryadella
Abundance
Leafminer
Tree variation
Oviposition
Leaf miners
Mortality
Survival
Density
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
Abstract: The ash leaf cone roller, Caloltilia firaxinella (Ely), is a leaf-mining moth that has recently become a significant pest of horticultural ash, Fraxinus L., species in communities throughout the western prairie provinces of Canada. The study examines the spatial and temporal within-host distribution of immature stages of C. fraxinella on green ash, Fraxinus pennsylvanica Marsh. Female C. fraxinella showed a preference for oviposition sites in the lower canopy and on the South side of the tree at the beginning and middle of the 3-week oviposition period, respectively, but no preference at the end of the period. Oviposition was constrained temporally and occurred mainly just after green ash bud flush. Immature staves were sampled throughout the growing season, and Measured widths of larval head capsules showed five instars. Fourth-instar larvae disperse from the mined leaflet to a new leaflet, roll it into a cone, and pupate. Neither canopy height nor ordinal direction affected the position of larvae in the canopy, but numbers of immature stages varied by tree within a site. Female and male moths eclose from rolled leaf cones synchronously throughout the emergence period. The Study provides some of the basic biological information required to design an integrated pest management program to target this emerging pest of horticultural ash trees.
Date created
2009
DOI
doi:10.7939/R3X63BC8C
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© 2009 Cambridge University Press. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
Citation for previous publication
Evenden, M. L. (2009). Biology of Caloptilia fraxinella (Lepidoptera: Gracillariidae) on ornamental green ash, Fraxinus pennsylvanica (Oleaceae). The Canadian Entomologist, 141(1), 31-39. doi: 10.4039/n08-036.
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