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    Author(s): Richard W. Hall; Jack H. Barger; Alden M. Townsend
    Date: 1988
    Source: Journal of Arboriculture 14(3): 61-66.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: Download Publication  (702.0 KB)


    Cuttings from two clonally propagated elm hybrids ('Pioneer' and 'Homestead') were treated with ozone (03), sulfur dioxide (S02), simulated acid rain or left untreated. Fumigants were applied 7 hours per day, 5 days per week for 9 weeks in open-top chambers. Fumigation treatments were: 0.1 ppm 03, 0.2 ppm S02, 0.1 ppm 03 plus 0.2 ppm SO2, and charcoal filtered air. An acid rain treatment (pH 4.0) of ca. 1.27 cm was made weekly in rain simulation chambers. Elm leaf beetle, Xanthogaleruca luteola (Muller), were fed foliage harvested from trees subjected to the treatment combinations. Oviposition and mortality of beetles were examined. Significantly fewer eggs were laid on 'Pioneer' elm than on 'Homestead' elm. Fumigation treatments had little direct effect on preoviposition period and fecundity. However, beetles fed acid rain treated foliage laid significantly fewer eggs than beetles fed foliage not treated with acid rain. Beetle mortality was not affected by any of the treatment combinations tested.

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    Hall, Richard W.; Barger, Jack H.; Townsend, Alden M. 1988. Effects of simulated acid rain, ozone and sulfur dioxide on suitability of elms for elm leaf beetle. Journal of Arboriculture 14(3): 61-66.

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