Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-25T06:06:41.605Z Has data issue: false hasContentIssue false
  • English
  • Français

Fate of Fluorodifen in Susceptible Cucumber Seedlings

Published online by Cambridge University Press:  12 June 2017

E. F. Eastin
E. F. Eastin*
Affiliation:
Dep. of Soil & Crop Sci., Texas A&M Univ., College Station, Texas 77843
Get access Rights & Permissions [Opens in a new window]

Abstract

Rapid absorption and acropetal translocation of 14C from p-nitrophenyl-α,α,α-trifluoro-2-nitro-p-tolyl ether (fluorodifen) labeled with 14C at either the 1 position of the p-nitrophenyl ring (fluorodifen-1′-14C) or the trifluoromethyl carbon (fluorodifen-14CF3) were observed in cucumber (Cucumis sativus L. ‘Ashley’) seedlings after root treatment via nutrient solution. The major degradative products of fluorodifen-1′-14C were p-nitrophenol and Unknown I (possibly a conjugate of p-nitrophenol). Some p-nitrophenyl-α,α,α-trifluoro-2-amino-p-tolyl ether (2-amino-fluorodifen), p-aminophenyl-α,α,α-trifluoro-2-amino-p-tolyl ether (p,2-diamino-fluorodifen), p-aminophenyl-α,α,α-trifluoro-2-nitro-p-tolyl ether (p-amino-fluorodifen), and several minor unknowns also were detected. The major degradative product of fluorodifen−14CF3 was Unknown II (possibly a conjugate of 2-amino-4-trifluoromethylphenol). Also detected were some 2-amino-fluorodifen, 2-amino-4-trifluoromethylphenol, p-amino-fluorodifen, p2-diamino-fluorodifen, 2-nitro-4-trifluoromethylphenol, and several minor unknowns. The basic difference in susceptibility to fluorodifen of cucumber and peanut (Arachis hypogaea L. ‘Starr’) appears to be due to the rate of acropetal translocation (cucumber translocates more than peanut) and the rate of degradation (peanut degrades fluorodifen much more rapidly than cucumber).

Type
Research Article
Information
Weed Science , Volume 20 , Issue 3 , May 1972 , pp. 255 - 260
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. Eastin, E. F. 1969. Movement and fate of p-nitrophenyl-α,α,α-trifluoro-2-nitro-p-tolyl ether-l'-14C in peanut seedlings. Plant Physiol. 44:1397–1401.Google Scholar
2. Eastin, E. F. 1971. Fate of fluorodifen in resistant peanut seedlings. Weed Sci. 19:261–265.Google Scholar
3. Eastin, E. F. 1971. Movement and fate of fluorodifen-1'-14C in cucumber seedlings. Weed Res. 11:63–68.Google Scholar
4. Eastin, E. F. 1971. Degradation of fluorodifen-l'-14C by peanut seedling roots. Weed Res. 11:120–123.Google Scholar
5. Geissbuhler, H., Baunok, I. and Gross, D. 1971. Radioisotope and chromatographic techniques for tracing the fate of herbicides in plants and soils. Proc. Int. Union of Pesticides Anal. Comm. (In press).Google Scholar
6. Hoagland, D. R. and Arnon, D. I. 1950. The water-culture method for growing plants without soil. California Agr. Exp. Sta. Circ. 347: 32 p.Google Scholar
7. Moreland, D. E., Blackmon, W. J., Todd, H. F. and Farmer, F. S. 1970. Effects of diphenylether herbicides on reactions of mitochondria and chloroplasts. Weed Sci. 18: 636–642.Google Scholar
8. Rogers, R. L. 1971. Absorption, translocation and metabolism of p-nitrophenyl-α,α,α-trifluoro-2-nitro-p-tolyl ether by soybeans. J. Agr. Food Chem. 19:32–35.Google Scholar
9. Walter, J. P., Eastin, E. F. and Merkle, M. G. 1970. The persistence and movement of fluorodifen in soils and plants. Weed Res. 10:165–171.Google Scholar