Premium
Hexachloroethane obscurant: Assessing tree foliage injury
Author(s) -
Sadusky M. C.,
Simini M.,
Skelly J. M.,
Checkai R. T.,
Wentsel R. S.
Publication year - 1993
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620120410
Subject(s) - robinia , liquidambar styraciflua , horticulture , biology , botany , aceraceae , maple
Open‐top chambers were used to determine the relationships between a hexachloroethane (HC) obscurant, zinc deposition, and foliar injury of tree species indigenous to military training facilities. Eight eastern U.S. tree species were exposed four times to three exposure regimens (0x, 1x, 2x) of the obscurant, measured as Zn, during the 1990 growing season. Plots received ambient or charcoal‐filtered air for comparison purposes. Black locust ( Robinia pseudoacacia L.) and black cherry ( Prunus serotina Ehrh.) were the most sensitive species, exhibiting significant ( p < 0.05) necrotic leaf spot, chlorotic mottle, and marginal necrosis of leaves at the 2x levels throughout the season. Defoliation was also greater ( p < 0.05) in exposed vs. unexposed plots. Sugar maple ( Acer saccharum Marsh.) injury was different among exposure regimens ( p < 0.05) only near the end of the season. Sweet gum (Liquidambar styraciflua L.), eastern white pine ( Pinus strobus L.), loblolly pine ( Pinus taeda L.), and Virginia pine ( Pinus virginiana Mill.) were asymptomatic. Charcoal filtration did not affect severity of symptoms. Zinc deposition was positively correlated ( p < 0.05) with most of the symptoms on black locust and black cherry. The HC obscurant in the concentrations used in this study adversely affected these species.