Black walnut curculio: patterns of nut damage in a plantation environment |
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| Authors: | M J Linit S Necibi |
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| Institution: | (1) Entomology Department, University of Missouri, 65211 Columbia, MO, USA |
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| Abstract: | Data on curculio-caused nut mortality have been collected since 1985 to assess the impact of this nut predator on black walnut trees grown in a plantation environment. These data have been analyzed to investigate spatial and temporal patterns of curculio damage. Curculio damage was independent of nut cluster height or cardinal direction within the crowns of young, nut-bearing black walnut trees, and was greater in parts of a walnut planting that bordered a stand of native hardwoods than in a part remote from the stand. Nut losses caused by the curculio were consistently higher in an upland versus a bottomland planting, although the differences were not significant during most years of the study. Nut mortality caused by the curculio differed among years of the study and was negatively correlated with annual nut abundance.Contribution from the Missouri Agricultural Experiment Station, Journal Series No 12, 156. |
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| Keywords: | alleycropping black walnut curculio Conotrachelus retentus eastern black walnut Juglans nigra nut mortality |
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