Weed control with atrazine and chlorsulfuron is determined by herbicide availability and persistence in soils

Walker, S. R., Robinson, G. R. and Hargreaves, P. A. (1997) Weed control with atrazine and chlorsulfuron is determined by herbicide availability and persistence in soils. Australian Journal of Agricultural Research, 48 7: 1003-1009.


Author Walker, S. R.
Robinson, G. R.
Hargreaves, P. A.
Title Weed control with atrazine and chlorsulfuron is determined by herbicide availability and persistence in soils
Journal name Australian Journal of Agricultural Research   Check publisher's open access policy
Publication date 1997
Sub-type Article
DOI 10.1071/A97027
Volume number 48
Issue number 7
ISSN 0004-9409
Start page 1003
End page 1009
Total pages 7
Place of publication Collingwood, Vic., Australia
Publisher CSIRO Publishing
Language eng
Formatted abstract Effectiveness and length of weed control with atrazine and chlorsulfuron can be variable in the field. While some of this may be due to climatic variations, differences in soil properties may also be important. We tested this by recording changes in control of mintweed (Salvia reflexa Hornem.) and turnip weed (Rapistrum rugosum L.) with time in different soils, and comparing these results with the measured changes in plant-available herbicide in the soils. Length of weed control with the same herbicide rate varied from 0 to >15 weeks. Mintweed and turnip weed were controlled (85-100%) only when the soils had ¸ 0·1µ#9839;g available atrazine/g and 0·8 ng available chlorsulfuron/g, respectively. This agreed with the sensitivity data for these weeds when grown in a soil-free system. The herbicides were initially more available in grey clays than in black earths, and soil pH accounted for most of the variations in the persistence of the available residues. Thus, the efficacy of these herbicides in different soils could be estimated if the available residues in the root-zone could be predicted and the sensitivity of different weeds was known.
Keyword Degradation
Herbicide residues
Efficacy
Soil pH
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Journal title since 2009: Crop and Pasture Science (1836-0947; 1836-5795)

Document type: Journal Article
Sub-type: Article
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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