A green stink bug sits on the corner of an inshell pecan as it feeds.

Monitoring Stink Bugs, an Annual Pecan Pest

Stink bugs are serious, annual pests of pecan. Their feeding on developing nuts before shell hardening leads to “black pit” of the embryo and nut abortion. After the shell hardens, damaged nuts remain on the tree and are harvested. Stink bug feeding injury on nuts with hardened shells and mature kernels usually is indicated by...

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A knifepoint reveals the density of obscure scale on a pecan tree.

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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A adult black pecan aphid and her nymphs sit on the yellow, chlorotic spot that they created on this once green pecan leaf.

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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