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    Author(s): David B. South
    Date: 2008
    Source: In: Dumroese, R. K.; Riley, L. E., tech. coords. National Proceedings: Forest and Conservation Nursery Associations-2007. Proc. RMRS-P-57. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 18-26
    Publication Series: Proceedings (P)
    Station: Rocky Mountain Research Station
    PDF: View PDF  (150 B)

    Description

    Viewpoints will vary in regards to the best alternative to methyl bromide (CH3Br) fumigation. In some cases, crop value will determine the best alternative. As the value of the crop increases, the rate (and cost) of the "best" treatment might increase as well. In addition, the recommendation will depend on if the individual has a "vested interest" in the production of high quality seedlings. An individual with no economic incentive might recommend an uneconomical, impractical, or unreliable alternative. In contrast, an individual who intends to make a profit might recommend an alternative that would cause minimal impact on costs and revenue. According to tests in both the southern and western US, chloropicrin applied under a tarp at 336 kg/ha (300 lb/ac) will cause a minimal disruption to a well-managed forest nursery. If nematodes are present, a fumigant like 1,3-D may be applied at time of treatment. Although chloropicrin is not as effective as CH3Br on certain perennial weeds, sanitation and the effective use of herbicides can minimize the population of troublesome weeds.

    Publication Notes

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    Citation

    South, David B. 2008. Comments on alternatives to methyl bromide for quarantine purposes in forest nurseries. In: Dumroese, R. K.; Riley, L. E., tech. coords. National Proceedings: Forest and Conservation Nursery Associations-2007. Proc. RMRS-P-57. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 18-26

    Keywords

    fumigation, chloropicrin, herbicides, nematodes, disease, weed control

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