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Herbicidal Activity of Starch Encapsulated Trifluralin

Published online by Cambridge University Press:  12 June 2017

Michael D. White  and
Marvin M. Schreiber
Michael D. White
Affiliation:
Res. Agron., Agric. Res. Serv., U.S. Dep. Agric., Purdue Univ., West Lafayette, IN 47907
Marvin M. Schreiber
Affiliation:
Dep. Bot. and Plant Pathol., Purdue Univ., West Lafayette, IN 47907
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Abstract

The formulation of trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine) encapsulated within a starch granule can reduce the loss in activity associated with the delayed incorporation of the emulsifiable concentrate formulation of trifluralin. Good weed control and high soybean [Glycine max (L.) Merr. ‘Wells II’] yields were obtained when a starch formulation of trifluralin was applied in the fall and incorporated at planting time the following spring. The cultural practices of shallow incorporation, delayed incorporation, and/or midseason cultivation intensified the weed control provided by a starch formulation of trifluralin. The adsorption of additional trifluralin onto the granule surface, cross-linking starch xanthate with a weak oxidant, and mixing granules with different release rates also increased initial control. Granules produced by the starch-calcium and starch-borate processes exhibited many of the same characteristics of granules produced by the older starch xanthate process, but are much less expensive to produce and do not require the use of the toxic carbon disulfide in the encapsulation process. The combination of an appropriate starch formulation of trifluralin with proper cultural practices provided good weed control from fall and spring applications of trifluralin.

Keywords

Glycine maxslow releasecontrolled releasesoil incorporationformulations
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 32 , Issue 3 , May 1984 , pp. 387 - 394
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

Literature Cited

1. Coffman, C. B. and Gentner, W. A. 1980. Persistence of several controlled release formulations of trifluralin in greenhouse and field. Weed Sci. 28:21–23.Google Scholar
2. Foley, M. E. and Wax, L. M. 1980. Effects of starch xanthate and sludge polymer on initial activity with delayed incorporation, residual activity and crop safety of several herbicides. Weed Sci. 28:626–632.Google Scholar
3. Helling, C. S., Kearney, P. C., and Alexander, M. 1971. Behavior of pesticides in soils. Pages 147–240 in Advances in Agronomy, Vol. 23. Academic Press New York.Google Scholar
4. Hollingsworth, E. B. 1980. Volatility of trifluralin from field soil. Weed Sci. 28:224–228.Google Scholar
5. Horowitz, M. 1966. A rapid bioassay for PEBC and its application in volatilization and adsorption studies. Weed Res. 6:22–36.Google Scholar
6. Parochetti, J. V. and Dec, G. W. Jr. 1978. Photodecomposition of eleven dinitroaniline herbicides. Weed Sci. 26:153–156.Google Scholar
7. Parochetti, J. V., Dec, G. W. Jr., and Burt, G. W. 1976. Volatility of eleven dinitroaniline herbicides. Weed Sci. 24:529–532.Google Scholar
8. Schreiber, M. M., Shasha, B. S., Ross, M. A., Orwick, P. L., and Edgecomb, D. W. Jr. 1978. Efficacy and rate of release of EPTC and butylate from starch encapsulated formulations under greenhouse conditions. Weed Sci. 26:679–686.Google Scholar
9. Schreiber, M. M. and White, M. D. 1980. Granule structure and rate of release with starch-encapsulated thiocarbamates. Weed Sci. 28:685–690.CrossRefGoogle Scholar
10. Schreiber, M. M. and White, M. D. 1980. Effect of formulation technology on the release of starch-encapsulated EPTC. Proc. 1980 British Crop Protection Conf. Weeds 225–229.Google Scholar
11. Shasha, B. S., Doane, W. M., and Russell, C. R. 1976. Starch encapsulated pesticides for slow release. J. Polym. Sci. 14:417–420.Google Scholar
12. Shasha, B. S., Trimnell, D., and Otey, F. H. 1981. Encapsulation of pesticides in a starch-calcium adduct. J. Polym. Sci. 19:1891–1899.Google Scholar
13. Trimnell, D., Shasha, B. S., Wing, R. E., and Otey, F. H. 1982. Pesticide encapsulation using a starch-borate complex as wall material. J. Appl. Polym. Sci. 27:3919–3928.Google Scholar
14. Wright, W. L. and Warren, G. F. 1965. Photochemical decomposition of trifluralin. Weeds 13:329–331.CrossRefGoogle Scholar