Copper toxicity in snapbeans (Phaseolus vulgaris L. )

Journal Article · Sat Jan 01 04:00:00 EST 1972 · J. Environ. Qual.; (United States)

DOI:https://doi.org/10.2134/jeq1972.00472425000100020022x· OSTI ID:6546852

Walsh, I M; Erhardt, W H; Seibel, H D

A 2-year field experiment was conducted to determine whether Cu applied for pathogen control could accumulate to a level that would be toxic to snapbeans (Phaseolus vulgaris L.). Copper sulfate and Cu(OH)/sub 2/ were applied at rates varying from 0 to 486 kg/ha of Cu on a Plainfield loamy sand to approximate 1, 3, 9, and 27 years of fungicidal treatment. Correlation and regression analyses were used to compare the amount of Cu extracted from the soil by 3 extraction procedures (0.1N HCl, EDTA, and DTPA) with crop yield and the concentration of Cu in snapbean tissue. Rates of up to 54 kg/ha Cu had no deleterious effect on the yield of snapbeans in either year. Slight yield decreases were noted when the rate of Cu exceeded 130 kg/ha, and a marked reduction in yield occurred when 405 kg/ha of Cu as Cu(OH)/sub 2/ or 486 kg/ha of Cu as CuSO/sub 4/ was applied. Yield decreases were similar the 1st and 2nd years after Cu application, indicating the Cu toxicity was not being ameliorated over a 2-year period of time. Soil Cu and yield were highly correlated for each of the extraction methods. Based on the regression equations, a significant yield depression was obtained when HCl or DTPA-extractable Cu exceeded 20 ppm, and when EDTA-extractable Cu exceeded 15 ppm. Soil Cu extracted by each extraction procedure was highly correlated with Cu in the leaf tissue, especially for the immature first trifoliate leaf. Yield reductions were noted when the Cu concentration in the seedling trifoliate increased from 20 to 30 ppm, and severe toxicity was observed at tissue concentrations in excess of 40 ppm Cu.

• Research Organization: Univ. of Wisconsin, Madison
• OSTI ID: 6546852
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 1:2; ISSN JEVQA
• Country of Publication: United States
• Language: English

Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL ACCUMULATION
CHEMISTRY
COPPER
DISTRIBUTION
ECOLOGICAL CONCENTRATION
ELEMENTS
FUNGICIDES
LEGUMINOSAE
MATHEMATICS
METALS
PESTICIDES
PHASEOLUS
PLANTS
PRODUCTIVITY
REGRESSION ANALYSIS
SOIL CHEMISTRY
STATISTICS
TISSUE DISTRIBUTION
TOXICITY
TRANSITION ELEMENTS