University of California

The influence of formulation, exposure time, and pH on the herbicidal action of dalapon foliar sprays tested on corn


Chester L. Foy

Author Affiliations

Chester L. Foy was Assistant Professor of Agricultural Botany and Assistant Botanist in the Experiment Station, Davis.

Publication Information

Hilgardia 35(7):125-144. DOI:10.3733/hilg.v35n07p125. November 1963.

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Technical and commercial dalapon were tested on corn, with or without one of the surfactants: Vatsol OT, Dynawet, and X-77. Acid dalapon and four of its salts also were tested. The acid and the sodium salt were about equal in effectiveness. The advantage of using various additional surfactants was amply demonstrated.

Dalapon penetrated corn leaves most readily in the nondissociated form, or at low pH in aqueous solutions. However, acute toxicity at very low pH interfered with translocation, which is necessary for effective growth inhibition by the herbicide. Optimum herbicidal results were obtained at about pH 6, near the pH of a solution of commercial dalapon in tap water.

The toxicity to corn of various dalapon formulations is discussed and interpreted in relation to known physicochemical properties of the parent compound, 2,2-dichloropropionic acid.

Literature Cited

Abernethy J. L. Principles of organic chemistry. 1949. Philadelphia and London: W. B. Saunders Company. 317p.

Antognini J. Chemical weed control in muck grown onions 1951. Ph.D. Thesis, Cornell Univ., Ithaca, N.Y

Crafts A. S. Herbicides. Ann. Rev. Plant Physiol. 1953. 4:253-82. DOI: 10.1146/annurev.pp.04.060153.001345 [CrossRef]

Crafts A. S. Weed control: applied botany. Amer. Jour. Bot. 1956. 43:548-56. DOI: 10.2307/2438898 [CrossRef]

Crafts A. S., Foy C. L. The chemical and physical nature of plant surfaces in relation to the use of pesticides. Residue Rev. 1962. 1:112-39.

Crafts A. S., Reiber H. G. Studies on the activation of herbicides. Hilgardia. 1945. 16(10):487-500. DOI: 10.3733/hilg.v16n10p485 [CrossRef]

Currier H. B. Wetting agents and other additives. Proc. California Weed Conf. 1954. 6:10-15.

Currier H. B., Dybing C. D. Foliar penetration of herbicides—review and present status. Weeds. 1959. 7:195-213. DOI: 10.2307/4040221 [CrossRef]

Daniels F. Outlines of physical chemistry. 1953. New York: John Wiley and Sons, Inc. 713p.

Davson H., Danielli J. F. The permeability of natural membranes. 1943. New York: The Macmillan Company. 316p.

Day B. E., Jordan L. S., Hendrixson R. T., Jolliffe V. A. Herbicidal properties of glycol and polyglycol esters of dalapon. Res. Prog. Report, West. Weed Control Conf. 1962. 1962:86-87.

Dow Chemical Company. Dalapon bulletin number II. 1953. Midland, Michigan: The Dow Chemical Company. 20p.

Ebeling Walter. The role of surface tension and contact angle in the performance of spray liquids. Hilgardia. 1939. 12(11):665-98. DOI: 10.3733/hilg.v12n11p665 [CrossRef]

Ennis W. B. Jr., Williamson R. E., Dorschner K. P. Studies on spray retention by leaves of different plants. Weeds. 1952. 1:274-86. DOI: 10.2307/4040120 [CrossRef]

Foy Chester L. Studies on the absorption, distribution, and metabolism of 2,2-dichloropropionic acid in relation to phytotoxicity 1958. Ph.D. Thesis, Univ. California, Davis

Foy Chester L. Absorption, distribution, and metabolism of 2,2-dichloropropionic acid in relation to phytotoxicity. I. Penetration and translocation of Cl38- and C14-labeled dalapon. Plant Physiol. 1961. 36:688-97. DOI: 10.1104/pp.36.5.688 [CrossRef]

Foy Chester L. Penetration and initial translocation of 2,2-dichloropropionic acid (dalapon) in individual leaves of Zea mays L. Weeds. 1962a. 10:35-39. DOI: 10.2307/4040557 [CrossRef]

Foy Chester L. Absorption and translocation of dalapon-2-C14 and -CI36 in Tradescantia fluminensis. Weeds. 1962b. 10:97-100. DOI: 10.2307/4040654 [CrossRef]

Foy Chester L. Influence of spray additives and environment on foliar penetration of dalapon-Cl36 in Tradescantia. Res. Prog. Report, West. Weed Control Conf. 1962c. 1962:82-83.

Freed V. H. Some physical properties of 2,2-dichloropropionic acid and 2,2,3-trichloropropionic acid 1956. Mimeograph for project #41-17, Oregon State Col., Corvallis

Freed V. H., Mckennon K., Montgomery M. The chemical and physical properties of 2,2-dichloropropionic acid. Res. Prog. Report, West. Weed Control Conf. 1955. 1955:81

Funderburk H. H. Jr., Davis D. E. Factors affecting the response of Zea mays and Sorghum halepense to sodium 2,2-dichloropropionate. Weeds. 1960. 8:6-11. DOI: 10.2307/4040500 [CrossRef]

Hamner C. L., Lucas E. H., Sell H. M. The effect of different activity levels on the herbicidal action of the sodium salt of 2,4-dichlorophenoxyacetic acid. Michigan Quart. Bul. 1947. 29:337-42.

Hanson N. S. Dalapon—for control of grasses on Hawaiian sugar cane lands. Down to Earth. 1956. 12(2):2-5.

Hauser E. W., Thompson J. T. A study of the absorption and translocation of several chemicals in Johnson grass, and an evaluation of their effectiveness for its control under field conditions. Weeds. 1959. 7:20-33. DOI: 10.2307/4040252 [CrossRef]

Hodgman C. D. Handbook of chemistry and physics. 1944. Cleveland, Ohio: Chemical Rubber Publishing Co. 2571p.

Holly K. Penetration of chlorinated phenoxyacetic acids into leaves. Ann. Appl. Biol. 1956. 44:195-99. DOI: 10.1111/j.1744-7348.1956.tb06858.x [CrossRef]

Jansen L. L., Gentner W. A., Shaw W. C. Effects of surfactants on the herbicidal activity of several herbicides in aqueous spray systems. Weeds. 1961. 9:381-405. DOI: 10.2307/4040856 [CrossRef]

Leopold A. C. The fate of 2,4-D in plants and soils. Proc. North Central Weed Control Conf. 1956. 13:4

Lucas E. H., Felber I. M., Hamner C. L., Sell H. M. The effect of buffers on the growth inhibition properties of sodium 2,4-dichlorophenoxy acetate. Michigan Quart. Bul. 1948. 30:289-97.

Montgomery M., Freed V. H. The determination of thermodynamic “activity” of chloroalkyl acids and amino triazole. Res. Prog. Report, West. Weed Control Conf. 1955. 1955:79-80.

Munakata K., Yokayama K., Shibata T., Harada A., Hara F. Herbicidal activities of halogenoalkylcarboxylic acid esters. I. Germination inhibition activities. Weeds. 1959. 7:470-73. DOI: 10.2307/4040469 [CrossRef]

Norris L. A., Freed V. H. Movement of C14 surfactant and 2,4,5-T in bean plants. Res. Prog. Report, West. Weed Control Conf. 1962. 1962:92-93.

Olsson E. A. Jr. Selective herbicidal activity of 2,2-dichloropropionic acid 1957. M.S. Thesis, Colorado State Univ., Fort Collins

Orgell W. H. Sorptive properties of the plant cuticle. Proc. Iowa Acad. Sci. 1957. 64:189-98.

Orgell W. H., Weintraub R. L. Influence of some ions on foliar absorption of 2,4-D. Bot. Gaz. 1957. 119:88-93. DOI: 10.1086/335967 [CrossRef]

Prasad R. Some phytotoxic and physiological effects of 2,2-dichloropropionic acid 1961. Ph.D. Thesis, Oxford University, England

Prasad R., Foy C. L., Crafts A. S. Role of relative humidity and solution additives on the foliar absorption and translocation of radio-labeled 2,2-dichloropropionic acid (dalapon). (Abstr.). Plant Physiol. 1962. 37(Sup.):xiii-

Redemann C. T., Hamaker J. Dalapon (2,2-dichloropropionic acid) as a protein precipitant. Weeds. 1954. 3:387-88. DOI: 10.2307/4040083 [CrossRef]

Robbins W. W., Crafts A. S., Raynor R. N. Weed control. A textbook and manual. 1952. 2nd ed. New York: McGraw-Hill Book Company, Inc. 503p.

Roberts E. A., Southwick M. D., Palmiter D. H. A microchemical examination of McIntosh apple leaves showing relationship of cell wall constituents to penetration of spray solutions. Plant Physiol. 1948. 23:557-59. DOI: 10.1104/pp.23.4.557 [CrossRef]

Santelmann P. W., Willard C. J. Dalapon for quackgrass control. Proc. North Central Weed Control Conf. 1954. 11:63-64.

Shaw W. C., Swanson C. K. Techniques and equipment used in evaluating chemicals for their herbicidal properties. Weeds. 1952. 1:352-65. DOI: 10.2307/4040032 [CrossRef]

Skoss J. D. Structure and composition of plant cuticle in relation to environmental factors and permeability. Bot. Gaz. 1955. 117:55-72. DOI: 10.1086/335891 [CrossRef]

Standifer L. C. Jr., Ennis W. B. Jr. Developmental studies on sodium 2,2-dichloropropionate as an herbicide for Johnson grass. Proc. South. Weed Conf. 1956. 9:183-89.

Szabo S. S., Buchholtz K. P. Penetration of living and non-living surfaces by 2,4-D as influenced by ionic additives. Weeds. 1961. 9:177-84. DOI: 10.2307/4040403 [CrossRef]

van Overbeek J. Absorption and translocation of plant regulators. Ann. Rev. Plant Physiol. 1956. 7:355-72. DOI: 10.1146/annurev.pp.07.060156.002035 [CrossRef]

van Overbeek J., Blondeau R. Mode of action of phytotoxic oils. Weeds. 1954. 3:55-65. DOI: 10.2307/4040131 [CrossRef]

Weaver R. J., Minarik C. E., Boyd F. T. Influence of rainfall on the effectiveness of 2,4-dichlorophenoxyacetic acid sprayed for herbicidal purposes. Bot. Gaz. 1946. 107:540-44. DOI: 10.1086/335379 [CrossRef]

Weintraub R. L. Relation of chemical structure to herbicidal action. (Abstr.). Weed Soc. Amer. 1956. 1956:41-42.

Wilkinson R. E. The physiological activity of 2,2-dichloropropionic acid 1955. Ph.D. Thesis, Univ. California, Davis

Williams M. C. Absorption and translocation of 2,4-dichlorophenoxyacetic acid in certain annual dicotyledons. Univ. Illinois Pub. 1956. 18:211 (Dissertation Abstr. 16:1771.)

Wood J. W., Mitchell J. W., Irving G. W. Translocation of a radioactive plant-growth regulator in bean and barley plants. Science. 1947. 105:337-39. DOI: 10.1126/science.105.2726.337 [CrossRef]

Zukel J. W., Smith A. E., Stone G. M., Davies M. E. Effect of some factors on rate of absorption of maleic hydrazide. (Abstr.). Plant Physiol. 1956. 31(Sup.):xxi-

Foy C. 1963. The influence of formulation, exposure time, and pH on the herbicidal action of dalapon foliar sprays tested on corn. Hilgardia 35(7):125-144. DOI:10.3733/hilg.v35n07p125
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