Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-30T15:35:58.583Z Has data issue: false hasContentIssue false
  • English
  • Français

Selectivity Mechanisms for Foliar Applications of Diclofop-methyl. II. Metabolism

Published online by Cambridge University Press:  12 June 2017

P. F. Boldt  and
A. R. Putnam
P. F. Boldt
Affiliation:
Dep. Hortic. Sci. and Landscape Archit., Univ. Minnesota, St. Paul, MN 55108
A. R. Putnam
Affiliation:
Pestic. Res. Ctr., Dep. Hortic., Michigan State Univ., East Lansing, MI 48824
Get access Rights & Permissions [Opens in a new window]

Abstract

The fate of foliarly applied 14C diclofop-methyl {methyl 2-[4-(2,3-dichlorophenoxy)phenoxy] propanoate} was determined in intact plants of barnyardgrass [Echinochloa crus-galli (L.) Beauv.], a susceptible (S) grass; proso millet (Panicum miliaceum L.), a moderately susceptible (MS) grass; longspine sandbur [Cenchrus longispinus (Hack.) Fern.], a tolerant (T) grass; soybean [Glycine max (L.) Merr. ‘Hark’], and cucumber (Cucumis sativus L. ‘Green Star’), both T broadleaf plants, 1,3, and 5 days after treatment (DAT). Diclofop-methyl accounted for 94% of the radioactivity washed from the leaf surfaces of all species. Plant extracts contained diclofop-methyl, diclofop, and water-soluble conjugates. Barnyardgrass (S), proso millet (MS), and soybean (T) had 75, 68, and 66% of the extracted radioactivity as diclofop and diclofop-methyl. Longspine sandbur (T) and cucumber (T) had 71 and 84% of the extracted radioactivity as water-soluble conjugates. Acid hydrolysis of the water-soluble conjugates yielded 84 and 71% diclofop in barnyardgrass (S) and proso millet (MS). Cucumber (T), soybean (T), and longspine sandbur (T) had 43, 23, and 25% ring-OH diclofop. Alkaline hydrolysis of the non-extracted plant residue yielded diclofop as the major component in all species.

Keywords

Metabolism in dicotmetabolism in monocotmetabolitesdiclofop{methyl 2-[4-(dichlorophenoxy)phenoxy] propanoate}
Type
Research Article
Information
Weed Science , Volume 29 , Issue 2 , March 1981 , pp. 237 - 241
Copyright
Copyright © Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Andersen, R. N. 1976. Control of volunteer corn and giant foxtail in soybeans. Weed Sci. 24:253–256.Google Scholar
2. Andersen, R. N. 1976. Response of monocotyledons to HOE 22870 and HOE 23408. Weed Sci. 24:266–269.Google Scholar
3. Boldt, P. F. and Putnam, A. R. 1980. Selectivity mechanisms for foliar applications of diclofop-methyl. I. Retention, absorption, translocation and volatility. Weed Sci. 28:474–477.Google Scholar
4. 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. 54:2038–2048.Google Scholar
5. 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. 56:567–578.Google Scholar
6. Gorbach, S. G., Kuenzler, K., and Asshauer, J. 1977. On the metabolism of HOE 23408 in wheat. J. Agric. Food Chem. 25: 507–511.Google Scholar
7. Holly, K. 1976. Selectivity in relation to formulation and application methods. Pages 249–275 in Audus, L. J., ed. Herbicides – Physiology, Biochemistry, Ecology. Vol. II. Academic Press, London.Google Scholar
8. 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
9. Sargent, J. A. 1976. Relationship of selectivity to uptake and movement. Pages 303–312 in Audus, L. J., ed. Herbicides – Physiology, Biochemistry, Ecology, Vol. II. Academic Press, London.Google Scholar
10. Shimabukuro, M. A., Shimabukuro, R. H., Nord, W. S., and Hoerauf, R. A. 1978. Physiological effect of methyl 2-(4-(2,4-dichlorophenoxy)phenoxy)propanoate on oat, wild oat and wheat. Pestic. Biochem. Physiol. 8:199–207.Google Scholar
11. 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. 27:615–623.Google Scholar
12. Smith, A. E. 1976. Esterification of the hydrolysis product of the herbicide diclofop-methyl in methanol. J. Agric. Food Chem. 24:1077–1078.Google Scholar
13. 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
14. Todd, B. G. and Stobbe, E. H. 1977. Selectivity of diclofop-methyl among wheat, barley, wild oat (Avena fatua) and green foxtail (Setaria viridis . Weed Sci. 25:382–385.Google Scholar
15. Wain, R. L. and Smith, M. S. 1976. Selectivity in relation to metabolism. Pages 279–320 in Audus, L. J., ed. Herbicides – Physiology, Biochemistry, Ecology. Vol. II. Academic Press, London.Google Scholar