Record Display for the EPA National Library Catalog


Main Title Growth Changes of Apple Seedlings in Response to Simulated Acid Rain.
Author Forsline, P. L. ; Dee, R. J. ; Melious, R. E. ;
CORP Author New York State Agricultural Experiment Station, Geneva. Dept. of Pomology and Viticulture.;Corvallis Environmental Research Lab., OR.
Year Published 1983
Report Number EPA/600/J-83/330;
Stock Number PB86-164985
Additional Subjects Growth ; Apple trees ; Air pollution ; Water pollution ; Injuries ; Foliage ; pH ; Inhibitors ; Leaves(Botany) ; Greenhouses ; Sensitivity ; Comparison ; Photosynthesis ; Reprints ; Acid rain ; Water pollution effects(Plants) ; Air pollution effects(Plants)
Library Call Number Additional Info Location Last
NTIS  PB86-164985 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
In a greenhouse experiment, Malus hupehensis seedlings were treated weekly with simulated acid rain solutions ranging from pH 2.25 to pH 7.0. Necrotic lesions developed on leaves at pH 2.25 and pH 2.50 immediately after the first application at the 8-node stage. Following the 9th weekly application on seedlings with 23 to 26 nodes, lesions developed at pH levels up to 3.25. At final destructive harvest, 20% of the leaf area at pH 2.25 and 8% of the leaf area at pH 2.50 was injures. Significant growth reduction occured at these 2 pH levels. Regression analysis indicated extensive growth inhibition at pH 3.0, no growth inhibition around pH 3.5, some inhibition between pH 4.5 and pH 5.6, and normal growth at pH 7.0 in comparison to the unsprayed control. Growth was negatively correlated with lesion formation at 3 destructive harvest dates.