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Influence of environmental factors on glyphosate efficacy when applied to Avena fatua or Urochloa panicoides

Citation

Adkins, SW and Tanpipat, S and Swarbrick, JT and Boersma, M, Influence of environmental factors on glyphosate efficacy when applied to Avena fatua or Urochloa panicoides, Weed Research, 38, (2) pp. 129-138. ISSN 0043-1737 (1998) [Refereed Article]

Copyright Statement

1998 European Weed Research Society

DOI: doi:10.1046/j.1365-3180.1998.00083.x

Abstract

Glasshouse experiments were conducted to determine the effects of soil moisture content, irradiance, temperature and relative humidity on the efficacy of glyphosate applied to six isogenic lines of Avena fatua L. (wild oat) and four near-isogenic lines of Urochloa panicoides Beauv. (liverseed grass). The variables examined were four soil moisture conditions (29%, 42%, 55% and 100% of field capacity), two levels of irradiance (400 and 800μmolm−2s−1), two levels of relative humidity (>92% and 65%) and four temperature regimes (20/15, 25/20, 30/25 and 35/30C: day/night), representing the environmental conditions of winter or summer fallows in the north-east grain region of Australia. The efficacy of 360g acid equivalent ha−1 glyphosate was greatest under well-watered (100% of field capacity), warm (30/25C for A. fatua and 35/30C for U. panicoides) and humid (>92/90%) conditions. The efficacy was least under severe water stress (29% of field capacity), warm (30/25C for A. fatua and 35/30C for U. panicoides) and moderately humid (65/60%) conditions. Efficacy was not altered by the level of irradiance nor was it different between isogenic lines.

Item Details

Item Type:Refereed Article
Keywords:glyphosate, efficacy, wheat, grain, Australia
Research Division:Agricultural and Veterinary Sciences
Research Group:Crop and Pasture Production
Research Field:Crop and Pasture Protection (Pests, Diseases and Weeds)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Winter Grains and Oilseeds
Objective Field:Wheat
Author:Boersma, M (Dr Mark Boersma)
ID Code:102061
Year Published:1998
Web of Science® Times Cited:17
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2015-07-25
Last Modified:2015-08-11
Downloads:0

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