Sulfuric acid as a penetrating agent in arsenical sprays for weed control
AuthorA. S. Crafts
Author AffiliationsA. S. Crafts was Assistant Botanist in the Experiment Station.
Hilgardia 8(4):125-147. DOI:10.3733/hilg.v08n04p125. December 1933.
Abstract does not appear. First page follows.
Sulfuric acid has been successfully used in the control of annual weeds and plant diseases in grain fields.(11) Åslander, in 1927,(1) reviewed briefly the earlier work and reported valuable experimental studies on the action of this chemical upon plants. He listed 53 weeds that have been killed and mentioned a few that did not respond to the acid. Most of the latter were perennials, grasses, and plants difficult to wet. He discussed the influence of soil moisture, relative humidity, and temperature upon the action of the acid and made histological studies on treated mustard leaves. Under the microscope he examined Elodea leaves in acid solutions. In all his work he compared sulfuric acid with iron sulfate. He found the acid much more rapid in its action upon the plant and explained its effectiveness in dry regions upon this basis. When the relative humidity was low, he found iron sulfate to crystallize on the leaves before penetration had taken place.
Sulfuric acid has proved useful in Arizona(3) against a number of weeds. Being produced as a convenient outlet for certain by-products of the smelting industry, it is relatively inexpensive. The chief draw-back to its general use is its strongly corrosive action on metal equipment—a difficulty that must be overcome before it can serve the farmer in combating annual weeds.
More reeentlyv(5) sulfuric acid has been found useful as a penetrating agent in an acid arsenical spray that promises to become useful in controlling certain deep-rooted perennial weeds. The mechanism responsible for the action of this type of spray was described in 1927,(8) and further experiments were reported in 1930.(4)
 Åslander Alfred. Sulfuric acid as a weed spray. Jour. Agr. Research. 1927. 34:1065-1091.
 Brenner W. Studien über die Empfindlichkeit und Permeabilität pflanzlicher Protoplasten für Saüren und Basen. Öfvers. Finska Vetensk. Soc. Förhandl. 1918. 60(4):1-124.
 Brown J. G., Streets R. B. Sulfuric acid spray: A practical means for the control of weeds. Arizona Agr. Exp. Sta. Bul. 1928. 128:299-316.
 Crafts A. S., Kennedy P. B. The physiology of Convolvulus arvensis (morning-glory or bindweed) in relation to its control by chemical sprays. Plant Physiol. 1930. 3:329-344. DOI: 10.1104/pp.5.3.329 [CrossRef]
 Crafts A. S. The use of arsenical compounds in the control of deep-rooted perennial weeds. Hilgardia. 1933. 7:361-372.
 Heilbrunn L. V. The colloid chemistry of protoplasm. Protoplasma Monographien I 1928. p.356. p. Berlin
 Johnson Ethelbert. Report on weed control activities. California Dept. Agr. Mo. Bul. 1927. 16:500
 Kennedy P. B., Crafts A. S. The application of physiological methods to weed control. Plant Physiol. 1927. 2:503-506. DOI: 10.1104/pp.2.4.503 [CrossRef]
 Morgan A. Experiments on the control of hoary cress. Victoria Jour. Agr. 1931. 29:504-515.
 Olsen John C. Van Nostrand’s chemical annual. 1922. New York: D. Van Nostrand Company. 900p.
 Rabate E. The use of sulfuric acid against weeds and certain crop parasites. Internatl. Rev. Sci. and Pract. Agr. (n.s.). 1926. 4:535-545.
 Rudolph Konrad. Epidermis und epidermale Transpiration. Bot. Archiv. 1925. 9:49-94.
 Stiles Walter, Jorgensen Ingvar. Studies in permeability. I. The exosmosis of electrolytes as a criterion of antagonistic ion-action. Ann. Bot. 1915. 29:349-367.
 Stiles Walter, Jorgensen Ingvar. Studies in permeability. II. The effect of temperature on the permeability of plant cells to the hydrogen ion. Ann. Bot. 1915. 29:611-618.
Also in this issue:Ground-water overdraft: Increasing demands creating long-run overdraft on ground-water resources of the Antelope Valley
The macadamia nut: Australian nut varieties studied as possible new crop for California
Exocortis transmission tests: Effect of Eureka lemon budwood in transmission of exocortis to trifoliate orange and hybrids studied
Nitroaenen and orange production: Results of preliminary experiments indicate some groves need less nitrogen to maintain production
Growth of citrus seedlings: Effect of 2,4–D available to roots of seedlings varies with concentration and seedling variety
Parasites of the frosted scale: Tests in northern California show natural enemies of scale control pest when not depleted by sprays
The sunflower moth: Preliminary experiments indicate parathion, DDT effective controls
Effect of pesticides in soils: Results of insecticide absorption by the soil is subject of field and greenhouse studies
Coyote brush on rangeland: Control of brush by chemicals successful in tests for reclaiming farming land in San Mateo County