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Herbicidal Properties of Low-volatile Esters of Dalapon

Published online by Cambridge University Press:  12 June 2017

B. E. Day ,
L. S. Jordan  and
R. T. Hendrixson
B. E. Day
Affiliation:
Department of Horticultural Science, University of California Citrus Research Center and Agricultural Experiment Station, Riverside, California
L. S. Jordan
Affiliation:
Department of Horticultural Science, University of California Citrus Research Center and Agricultural Experiment Station, Riverside, California
R. T. Hendrixson
Affiliation:
Department of Horticultural Science, University of California Citrus Research Center and Agricultural Experiment Station, Riverside, California
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Abstract

Rates of evaporation of dalapon acid and four low-volatile esters of dalapon from open dishes at 38C. in pounds per acre per hour, determined gravimetrically, were dalapon acid, 180; propyleneglycol bis ester, 27; diethyleneglycol bis ester, 1.6; dipropyleneglycol bis ester, 0.83; and triethyleneglycol bis ester, 0.61. Foliar applications on an acid equivalent basis were phytotoxic to seedling oats in the increasing order of propyleneglycol bis ester, acid, dipropyleneglycol bis ester, diethyleneglycol bis ester, sodium salt, and tripropyleneglycol bis ester. Relative phytotoxicities were not altered by subjecting plants to rapid drying after spraying. These compounds did not differ significantly in phytotoxicity when added to the rooting medium of germinating oat plants. The triethyleneglycol bis ester, and possibly other esters of dalapon, may offer practical advantages as herbicides other than those related to volatility.

Type
Research Article
Information
Weeds , Volume 11 , Issue 2 , April 1963 , pp. 128 - 130
Copyright
Copyright © 1963 Weed Science Society of America 

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References

Literature Cited

1. Day, B. E. 1957. The bermudagrass problem in citrus and avocado orchards. Proc. 9th California Weed Conf. 22–25.Google Scholar
2. Day, B. E. 1961. Formulation of dalapon to reduce soil contamination. Weed Res. 1:177–183.Google Scholar
3. Laning, Jr., Enos, R. 1958. Sodium 2,2-dichloropropionate and sodium 2,2,3-trichloropropionate absorption and translocation in certain vegetable crops and residual activity in soil. Diss. Abs. 18:(4) 1197, Part 2.Google Scholar