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Invert Emulsions: Carrier and Water Source for the Mycoherbicide, Alternaria cassiae

Published online by Cambridge University Press:  12 June 2017

D. J. Daigle ,
W. J. Connick Jr. ,
Paul C. Quimby Jr. ,
Janice Evans ,
Brenda Trask-Morrell  and
F. E. Fulgham
D. J. Daigle
Affiliation:
South. Regional Res. Cent., U.S. Dep. Agric., Agric. Res. Serv., New Orleans, LA 70179
W. J. Connick Jr.
Affiliation:
South. Regional Res. Cent., U.S. Dep. Agric., Agric. Res. Serv., New Orleans, LA 70179
Paul C. Quimby Jr.
Affiliation:
South. Weed Sci. Lab., U.S. Dep. Agric., Agric. Res. Serv., Stoneville, MS 38776
Janice Evans
Affiliation:
South. Regional Res. Cent., U.S. Dep. Agric., Agric. Res. Serv., New Orleans, LA 70179
Brenda Trask-Morrell
Affiliation:
South. Regional Res. Cent., U.S. Dep. Agric., Agric. Res. Serv., New Orleans, LA 70179
F. E. Fulgham
Affiliation:
South. Weed Sci. Lab., U.S. Dep. Agric., Agric. Res. Serv., Stoneville, MS 38776
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Abstract

The weed sicklepod, a problem in the cultivation of soybean, cotton, and peanut, can be controlled by the mycoherbicide, Alternaria cassiae. However, the presence of water (dew) for an extended period is required by the fungal spores to germinate and infect the target weed. Preliminary tests with invert (water-in-oil) emulsions containing paraffin wax, paraffin oil, lecithin, and water indicated that about 10% (w/w) water, maintained over an 18-h period, was necessary under laboratory conditions for significant germination of the fungus. The ability to maintain that amount of water in the invert emulsion depended upon spray deposit size, adjuvants, and oil phase: water ratio. Paraffin wax was an effective adjuvant for reducing water evaporation and increasing sicklepod mortality in the greenhouse.

Keywords

Sicklepod, Cassia obtusifolia L. ♯4 CASOBcotton, Gossypium hirsutum L.peanut, Arachis hypogea L.soybean, Glycine max (L.) Merr.Alternaria cassiae Jurair and KhanBiological controlformulationparaffin waxsicklepodwater evaporationCASOB
Type
Research
Information
Weed Technology , Volume 4 , Issue 2 , June 1990 , pp. 327 - 331
Copyright
Copyright © 1990 Weed Science Society of America 

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References

Literature Cited

1. Beatty, R. H., Kirch, J. H., and Sterry, J. R. 1959. Invert Emulsions. Rep. First Int. Agric. Aviation Conf., Sept. 15–18, 1959, Cranfield, England. p. 103–110.Google Scholar
2. Cardina, J., Littrell, R. H., and Hanlin, R. T. 1988. Anthracnose of Florida beggarweed (Desmodium tortuosum) caused by Colletotrichum truncatum . Weed Sci. 36:329–334.Google Scholar
3. Cartwright, R. D., and Templeton, G. E. 1988. Biological limitations of Protomyces gravidus as a mycoherbicide for giant ragweed, Ambrosia trifida . Plant Dis. 72:580–582.Google Scholar
4. Charudattan, R., Walker, H. L., Boyette, C. D., Riddings, W. H., TeBeest, D. O., Van Dyke, C. G., and Worsham, A. D. 1986. Evaluation of Alternaria cassiae as a mycoherbicide for sicklepod (Cassia obtusifolia) in regional field tests. Ala. Agric. Exp. Stn., South. Coop. Ser. Bull. 137.Google Scholar
5. Ford, R. E., and Furmidge, C.G.L. 1967. Physico-chemical studies on agricultural sprays. VIII. Viscosity and spray drop size of water-in-oil emulsions. J. Sci. Food Agric. 18:419–428.Google Scholar
6. Griffin, W. C. 1983. Emulsions. p. 904–908 in 3rd edition Kirk–Othmer Encyclopedia of Chemical Technology. Vol. 8. John Wiley & Sons, New York.Google Scholar
7. Hall, A. B. 1986. Controlling brush on right-of-way with aerial sprays of invert emulsions. Down Earth 42(1):5–9.Google Scholar
8. McWhorter, C. G., Fulgham, F. E., and Barrantine, W. L. 1988. An air-assist spray nozzle for applying herbicides in ultra low volume. Weed Sci. 36:118–121.Google Scholar
9. Quimby, P. C. Jr., Fulgham, F. E., Boyette, C. D., and Connick, W. J. Jr. 1989. An invert emulsion replaces dew in biocontrol of sicklepod – A preliminary study. p. 264–270 in Hovde, D. A. and Beestman, G. B., ed. Pesticide Formulations and Application Systems: 8th Vol., ASTM STP 980. Am. Soc. Testing Materials, Philadelphia, PA.Google Scholar
10. Quimby, P. C. Jr., Fulgham, F. E., Boyette, C. D., Hoagland, R. E., and Connick, W. J. Jr. 1988. New formulations/nozzles boost efficacy of pathogens for weed control Abstr. Weed Sci. Soc. Am. 28:52.Google Scholar
11. Walker, H. L., and Boyette, C. D. 1985. Biocontrol of sicklepod (Cassia obtusifolia) in soybeans (Glycine max) with Alternaria cassiae . Weed Sci. 33:212–215.Google Scholar
12. Walker, H. L., and Riley, J. A. 1982. Evaluation of Alternaria cassiae for the biocontrol of sicklepod (Cassia obtusifolia). Weed Sci. 30:651–654.Google Scholar