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Plant Competition for Atrazine

Published online by Cambridge University Press:  12 June 2017

D. W. Hoffman  and
T. L. Lavy
D. W. Hoffman
Affiliation:
Univ. of Nebraska, Lincoln, NB 68583
T. L. Lavy
Affiliation:
Univ. of Nebraska, Lincoln, NB 68583
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Abstract

Greenhouse and field studies demonstrated that plants compete for soil-applied atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine]. Oats (Avena sativa L. ‘Neal’) and soybeans [Glycine max (L.) Merr. ‘Clark 63’] were grown in greenhouse bioassay studies to study the effects of plant population on bioassay sensitivity. High plant populations were not as effective as low plant populations in detecting low levels of atrazine in soil. Conversely, by increasing plant populations or decreasing soil volumes quantitative measurement of higher atrazine concentrations can be determined. A 14C-labeled atrazine study showed that by increasing soybean populations from one to six per pot, atrazine uptake per plant was decreased 50%. When soybeans were planted at a rate of six plants per 100 cm2 in a field treated with atrazine at 1.1 kg/ha, soybean dry weight production was 97% of the untreated control; when planted at a rate of one plant per 100 cm2, dry weight was only 26% of the comparable untreated check. Thus, herbicide rates for optimum weed control may have to be increased with increasing weed populations or increased crop seeding rates or both.

Type
Research Article
Information
Weed Science , Volume 26 , Issue 1 , January 1978 , pp. 94 - 99
Copyright
Copyright © 1978 by the Weed Science Society of America 

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References

Literature Cited

1. Ashton, F. M. 1965. Relationship between light and toxicity symptoms caused by atrazine and monuron. Weeds 13:164–168.CrossRefGoogle Scholar
2. Barr, A. J. and Goodnight, J. H. 1972. A users guide to the statistical analysis system. Raleigh, NC. NC State Univ. 260 pp.Google Scholar
3. Bliss, C. I. 1957. Some principles of bioassay. Amer. Sci. 45:449–466.Google Scholar
4. Burnside, O. C. and Behrens, R. 1961. Phytotoxicity of simazine. Weeds 9:145–147.Google Scholar
5. Burnside, O. C., Schmidt, E. L., and Behrens, R. 1961. Dissipation of simazine from the soil. Weeds 9:447–484.CrossRefGoogle Scholar
6. Burrill, L. C. and Appleby, A. P. 1974. Influence of weed density on efficacy of diuron and cycloate. Weed Sci. Abstr. P. 84.Google Scholar
7. Crafts, A. S. 1935. Toxicity of sodium arsenite and sodium chlorate in four California soils. Hilgardia 9:459–498.CrossRefGoogle Scholar
8. Crafts, A. S. and Raynor, R. M. 1936. The herbicidal properties of boron compounds. Hilgardia 10:343–347.CrossRefGoogle Scholar
9. Dawson, J. H., Bruns, V. F., and Clore, W. J. 1968. Residual monuron, diuron and simazine in a vineyard soil. Weed Sci. 16:63–65.CrossRefGoogle Scholar
10. Donaldson, T. W. and Foy, C. L. 1965. The phytotoxicity and persistence in soils of benzoic acid herbicides. Weeds 13:195–202.CrossRefGoogle Scholar
11. Emmons, C. W. 1950. Hormone Assay. Academic Press. New York. 556 pp.Google Scholar
12. Frank, R. 1966. Atrazine carryover in the production of sugar beets in southwestern Ontario. Weeds 14:85.Google Scholar
13. Freed, V. H. 1964. Determination of herbicides and plant growth regulators. Page 39 in Andus, L. J., ed. Physiology and Biochemistry of Herbicides. Academic Press, New York.Google Scholar
14. Harvey, R. G. 1973. Influence of cropping and activated carbon on persistence of atrazine in sand. Weed Sci. 21:204–206.CrossRefGoogle Scholar
15. Rogers, E. G. 1968. Leaching of seven s-triazines. Weed Sci. 16:117–120.CrossRefGoogle Scholar
16. Sheets, T. J. 1958. The comparative toxicities of four phenyl herbicides in several soil types. Weeds 6:413–424.CrossRefGoogle Scholar