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An Improved Invert Emulsion with High Water Retention for Mycoherbicide Delivery

Published online by Cambridge University Press:  12 June 2017

William J. Connick Jr. ,
Donald J. Daigle  and
Paul C. Quimby Jr.
William J. Connick Jr.
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., New Orleans, LA 70179
Donald J. Daigle
Affiliation:
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
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Abstract

An invert emulsion with low viscosity and excellent water-holding properties was developed for delivery of fungal weed pathogens (mycoherbicides). Alternaria cassiae, a pathogen of sicklepod, proliferated after incorporation of spores in the emulsion. The oil phase (CDQ-1) contained paraffin wax, a paraffinic spray oil, and an unsaturated monoglyceride emulsifier (Myverol 18–99). The oil phase was mixed 1:1 (by weight) with water to form the invert, which was sprayed onto glass plates for testing of water retention properties. Water contents ranged from 22% (with A. cassiae present) to 41% (without fungus) for 0.6 to 0.7-mm2 spray deposits after 24-h storage at 21 C and 65% relative humidity. An invert emulsion containing lactofen was prepared using the CDQ-1 formulation.

Keywords

Lactofen, (±)-2-ethoxy-1-methyl-2-oxoethyl 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoatesicklepod, Cassia obtusifolia L. ♯ CASOBAlternaria cassiae Jurair and KhanBiological controlemulsifierformulationmonoglyceridesicklepodwater evaporationweed controlAlternaria cassiaeCASOB
Type
Note
Information
Weed Technology , Volume 5 , Issue 2 , June 1991 , pp. 442 - 444
Copyright
Copyright © 1991 Weed Science Society of America 

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References

Literature Cited

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