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    Author(s): A.G. Kais; R.C. Hare; J.P. Barnett
    Date: 1984
    Source: Res. Note SO-307. 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
    PDF: View PDF  (217 KB)

    Description

    Rapid height growth of longleaf pine seedlings, important to production of uniform, even-aged stands, can be promoted by controlling brown-spot needle blight and weed competition, and by increasing soil fertility. Root systems of container-grown longleaf pine seedlings were dip-treated in either benomyl/clay mix (10 percent a.i. benomyl) or clay control and planted in scalped rows that had been treated with various levels of nitric acid (0, 4, or 8 percent). After one growing season in the field, seedlings were evaluated for survival, brown spot infection, and vigor; plots were evaluated for weed competition. The benomyl root-dip treatment improved seedling survival, controlled brown spot infection, and promoted growth of outplanted seedlings in the first year. For the same period, treatment of soil with nitric acid improved seedling survival and vigor and significantly reduced the amount of competing vegetation. The combined use of benomyl and nitric acid resulted in the most rapid height growth.

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    Citation

    Kais, A.G.; Hare, R.C.; Barnett, J.P. 1984. Nitric Acid and Benomyl Stimulate Rapid Height Growth of Longleaf Pine. Res. Note SO-307. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 4 p.

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    Keywords

    Brown-spot needle blight, Scirrhia acicola (Dearn.) Siggers, fertilizer, herbicide, disease control, Pinus palustris

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