Growth response of direct-seeded rice to oxadiazon and bispyribac-sodium in aerobic and saturated soils

Chauhan, Bhagirath S. and Johnson, David E. (2011) Growth response of direct-seeded rice to oxadiazon and bispyribac-sodium in aerobic and saturated soils. Weed Science, 59 1: 119-122. doi:10.1614/WS-D-10-00075.1


Author Chauhan, Bhagirath S.
Johnson, David E.
Title Growth response of direct-seeded rice to oxadiazon and bispyribac-sodium in aerobic and saturated soils
Journal name Weed Science   Check publisher's open access policy
ISSN 0043-1745
1550-2759
Publication date 2011
Sub-type Article (original research)
DOI 10.1614/WS-D-10-00075.1
Open Access Status
Volume 59
Issue 1
Start page 119
End page 122
Total pages 4
Place of publication Lawrence, KS, United States
Publisher Weed Science Society of America
Language eng
Abstract Studies were conducted to determine the growth responses of rice to PRE application of oxadiazon and POST application of bispyribac-sodium. Oxadiazon at 1.0 and 1.5 kg ha-1 and bispyribac-sodium at 0.030 and 0.045 kg ha-1 were applied to four rice varieties ('IR64', 'IR72', 'RC09', and 'RC18'), which were grown in saturated and aerobic (30% of saturation) soils. Control treatments, where no herbicides were applied, were also included in the study. Shoot and root biomass, and height of rice plants were measured 14 d after application. Phytotoxic effects for both herbicides, including reduced shoot and root biomass, were consistent in all varieties. Rice phytotoxicity symptoms were greater when herbicides were applied to saturated than to aerobic soils. Oxadiazon at 1.0 kg ha-1 reduced rice shoot biomass by 22 to 36% in aerobic condition, and 43 to 56% in saturated condition when compared with the control. Bispyribac-sodium reduced rice shoot biomass by 9 to 17% at 0.030 kg ha-1 in aerobic soil and 23 to 37% in saturated soil. The results of this study suggest that soil water content is an important factor influencing herbicide phytotoxicity in rice, and its influence warrants further research to improve understanding of physiology of phytotoxicity to minimize the effects of these herbicides on crop production.
Keyword Aerobic
Biomass
Phytotoxicity
Saturated
Water content
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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