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Influence of Growth Stage on Rice (Oryza sativa) Tolerance to Triclopyr

Published online by Cambridge University Press:  12 June 2017

Joe E. Street ,
John L. Baldwin  and
Thomas C. Mueller
Joe E. Street
Affiliation:
Delta Branch Exp. Stn., Stoneville, MS
John L. Baldwin
Affiliation:
Delta Branch Exp. Stn., Stoneville, MS
Thomas C. Mueller
Affiliation:
USDA-ARS, South Weed Sci. Lab., Stoneville, MS 38776
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Abstract

Field studies were conducted from 1985 to 1989 on a Sharkey clay to examine injury to a semi-dwarf rice cultivar, ‘Lemont’, from triclopyr or triclopyr plus propanil. Triclopyr applied in the booting stage reduced yield two of three years, with the observed yield reduction possibly caused by epinasty of the rice flag leaf. Triclopyr application to three- to four-leaf rice caused hyponasty. Triclopyr did not reduce plant height, seed weight, germination, or total milling yield. Triclopyr plus propanil caused more leaf burn that triclopyr alone, but yields were not reduced compared with the untreated control. This research indicated that triclopyr and triclopyr plus propanil can be used in rice production with the semi-dwarf cultivar, Lemont, with the potential to minimize drift to non-target crops due to the greater flexibility in application timing compared with 2,4-D application.

Keywords

Propanil, N-(3,4-dichlorophenyl)propanamidetriclopyr, [(3,5,6-trichloro-2-pyridinyl)oxy]acetic acid2,4-D, (2,4-dichlorophenoxy)acetic acidrice, Oryza sativa L. ‘Lemont’Crop injuryselectivityphytotoxicitytolerance
Type
Research
Information
Weed Technology , Volume 6 , Issue 4 , December 1992 , pp. 930 - 933
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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