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Selectivity Mechanisms for Foliar Applications of Diclofop-Methyl. I. Retention, Absorption, Translocation, and Volatility

Published online by Cambridge University Press:  12 June 2017

P. F. Boldt
Affiliation:
Pestic. Res. Ctr., Dep. Hortic., Michigan State Univ., East Lansing, MI 48824
A. R. Putnam
Affiliation:
Pestic. Res. Ctr., Dep. Hortic., Michigan State Univ., East Lansing, MI 48824

Abstract

Retention, absorption, translocation, and volatility of foliarly applied diclofop-methyl {methyl 2-[4-(2,4-dichlorophenoxy) phenoxy] propanoate} were compared in barnyardgrass [Echinochloa crus-galli (L.) Beauv.], a susceptible grass; proso millet (Panicum miliaceum L.), a moderately susceptible grass; longspine sandbur [Cenchrus longispinus (Hack.) Fern.], a tolerant grass; and soybean [Glycine max (L.) Merr. ‘Hark’] and cucumber (Cucumis sativus L. ‘Green Star’), both tolerant broadleaf plants. On a jug/plant basis, the order of diclofop-methyl spray retention was cucumber > soybean > proso millet > longspine sandbur = barnyardgrass. On a μg/mg dry weight basis, proso millet retained 3 to 10 times more diclofop-methyl than all other species. One day after treatment (DAT), absorption of 14C-diclofopmethyl was 14 to 18% less in longspine sandbur than in the other species, 3 DAT absorption in cucumber was 8 to 14% greater than in the other species, and 5 DAT absorption in soybean was 3 to 12% less than in other species. Translocation of 14C-diclofop-methyl did not differ among species, with 98% of the applied radioactivity located in the treated leaf. An average of 11% of radioactivity applied to the surface of intact, living plants and excised, dried leaves of cucumber, soybean, and barnyardgrass, as well as glass cover slips, was lost by evaporation. None of the parameters measured showed differences large enough to be implicated as primary selectivity mechanisms.

Type
Research Article
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

1. American Hoechst Co. 1976. Technical information bulletin. Agric. Chem. Dep., Amer. Hoechst Co., Somerville, NJ. 7 pp.Google Scholar
2. Andersen, R. N. 1976. Control of volunteer corn and giant foxtail in soybeans. Weed Sci. 24:253256.Google Scholar
3. Andersen, R. N. 1976. Response of monocotyledons to HOE 22870 and HOE 23408. Weed Sci. 24:266269.Google Scholar
4. Brady, N. C. 1974. Nature and Properties of Soils. Macmillan Publishing Co., NY. 639 pp.Google Scholar
5. Brewster, B. D., Appleby, A. P., and Spinney, R. L. 1977. Control of Italian ryegrass and wild oats in winter wheat with HOE 23408. Agron. J. 69:911913.Google Scholar
6. Brezeanu, A. G., Davis, D. G., and Shimabukuro, R. H. 1976. Ultrastructural effects and translocation of methyl-2-(4-(2,4-dichlorophenoxy)phenoxy) propanoate in wheat (Triticum aestivum) and wild oat (Avena fatua . Can. J. Bot. 54:20382048.Google Scholar
7. Friesen, H. A., O'Sullivan, P. A., and Vanden Born, W. H. 1976. HOE 23408, a new selective herbicide for wild oats and green foxtail in wheat and barley. Can. J. Plant Sci. 56:567578.Google Scholar
8. Gorbach, S. G., Kuenzler, K., and Asshauer, J. 1977. On the metabolism of HOE 23408 OH in wheat. J. Agric. Food Chem. 25:507511.Google Scholar
9. Hoagland, D. R. and Arnon, D. I. 1950. The water culture method for growing plants without soil. Calif. Agric. Expt. Stan. Circ. 347. 32 pp.Google Scholar
10. Holly, K. 1976. Selectivity in relation to formulation and application methods. Pages 249275 in Audus, L. J., ed. Herbicides – Physiology, Biochemistry, Ecology. Vol. II. Academic Press, London.Google Scholar
11. Putnam, A. R., Love, A. P., and Rice, R. P. Jr. 1974. Control of annual grasses in vegetable crops with HOE 23408 and HOE 22870. Proc. North Cent. Weed Control Conf. 29:74.Google Scholar
12. Sargent, J. A. 1976. Relationship of selectivity to uptake and movement. Pages 303312 in Audus, L. J., ed. Herbicides – Physiology, Biochemistry, Ecology. Vol. II. Academic Press, London.Google Scholar
13. Shimabukuro, R. H., Walsh, W. C., and Hoerauf, R. A. 1979. Metabolism and selectivity of diclofop-methyl in wild oat and wheat. J. Agric. Food Chem. 27:615623.Google Scholar
14. Todd, B. G. and Stobbe, E. H. 1976. Selectivity of diclofop-methyl among wheat, barley, wild oat, and green foxtail. Proc. North Cent. Weed Control Conf. 31:140.Google Scholar
15. Todd, B. G. and Stobbe, E. H. 1977. Selectivity of diclofopmethyl among wheat, barley, wild oat (Avena fatua), and green foxtail (Setaria viridis . Weed Sci. 25:382385.Google Scholar