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    Author(s): J.D. Solomon
    Date: 1999
    Source: Res. Note SO-326. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 4 p.
    Publication Series: Research Note (RN)
    Station: Southern Forest Experiment Station
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    Description

    A very heavy infestation of the aphid Chaitophorus populicola Thomas developed primarily on growing shoots in commercial cottonwood plantations and caused serious injury to terminals. Terminal mortality in heavily infested fields averaged 92.5 percent, and shoot dieback averaged 4.3 inches. Many of the surviving terminals were weakened to the extent that slow growth allowed lateral bud growth to become dominant. After one growing season, trees in heavily infested fields generally had more stem deformities in the form of heavy branches and forks than did those in lightly infested fields. Four insecticides, acephate, carbaryl, chlorpyrifos, and diazinon, gave excellent control of the aphids.

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    Citation

    Solomon, J.D. 1999. Early Impact and Control of Aphid (Chaitophorus populicola Thomas) Infestations on Young Cottonwood Plantations in the Mississippi Delta. Res. Note SO-326. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 4 p.

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    Keywords

    Populus deltoides, terminal mortality, dieback, stem deformities, insecticides

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