Obscure Scale: A Stealthy Pest of Pecan
A handful of pest species cause most economic injury to pecan year after year. Pests attacking the developing nut include the stink bug complex, pecan weevil, hickory shuckworm, and pecan nut casebearer, while the aphid complex and mites attack the foliage. Occasionally, other pest species may cause sporadic injury, but their activity is usually limited...
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Lady Beetles, Pecan Orchards, and Ground Covers
Pecan aphids have many natural enemies. Some are rarely seen and may not be recognized for the good they do against pecan aphids. Although important, these natural enemies will be saved to write about later. Instead, this article focuses on the well-known and commonly seen lady beetles whose striking colors cannot help but attract attention....
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Pecan Aphids, Part III: A Different Approach to Managing the Black Pecan Aphid
The first and second articles in this series on pecan aphids focused on the distribution of the three aphid species (blackmargined aphid, yellow pecan aphid, and black pecan aphid) on pecan foliage and their feeding biology. An emphasis was placed on how the black pecan aphid conditions foliage at feeding sites by eliciting chlorotic zones,...
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Pecan Aphids, Part II: Feeding Biology
In the first of this three-part series on the pecan-feeding aphids (March 2019), I covered how different aphid species distribute on pecan foliage. At the end of that article, we questioned why nymphs of the blackmargined pecan aphid and yellow pecan aphid favor the underside of the pecan leaf, but a proportion of black pecan...
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Pecan Aphids, Part I: Distribution on Pecan Leaves
This article is the first of a three-part series examining the pecan-feeding aphids, especially the black pecan aphid. This first part concerns the general biology of the pecan aphids and their distribution on pecan leaves. In the second part, the emphasis will shift to the black pecan aphid with a discussion of feeding biology, and...
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