The information contained in this publication is based on knowledge and understanding at the time of writing (June 2017) and may not be accurate, current or complete. The State of New South Wales (including the NSW Department of Industry), the author and the publisher take no responsibility, and will accept no liability, for the accuracy, currency, reliability or correctness of any information included in the document (including material provided by third parties). Readers should make their own inquiries and rely on their own advice when making decisions related to material contained in this publication. The product trade names in this publication are supplied on the understanding that no preference between equivalent products is intended and that the inclusion of a product name does not imply endorsement by the department over any equivalent product from another manufacturer.
| Researcher(s) |
Michael Hopwood (NSW DPI) Adam Shephard (NSW DPI) Hanwen Wu (NSW DPI) |
|---|---|
| Year(s) | 2017 |
| Contributor | Department of Primary Industries NSW |
| Trial location(s) |
Wagga Wagga, NSW
|
| Further information | View external link |
The aim of this research was to identify effective post-emergent herbicidal options for witch grass control.
• It is difficult to effectively control witch grass in summer.
• No single herbicide treatment achieved 100% control.
• Glyphosate-based herbicide treatments were the best performers, achieving 86–88% control.
• The mixture of glyphosate + simazine had residual control on subsequent emergences.
Randomised complete block design was used with four replicates. The plot size was 2 × 9 m
| Lead research organisation | N/A |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC UA00149 |
| Trial funding source | DPI NSW |
| Related program | N/A |
| Acknowledgments |
This experiment was part of the project ‘Improving IWM practice of emerging weeds in the southern and western regions’, UA00149, 2014–17, a collaborative weed project between The University of Adelaide and NSW DPI, with joint investment by GRDC and NSW DPI. |
| Other trial partners | Not specified |
| Crop type | Other crop: Grasses |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Randomised,Replicated,Blocked |
| Sow rate or Target density | 500 plants per square metre |
|---|---|
| Sow date | Not applicable |
| Harvest date | Not applicable |
| Plot size | 2m x 9m |
| Plot replication | 4 |
| Plot randomisation | yes |
| Herbicide |
Herbicide treatments were applied using a 2 m hand-operated boom fitted with Teejet 11002 nozzles, delivering 100 L/ha spray volume at 2 bar pressure. Herbicides were applied on 17 December 2016 following 55 mm of rain which fell on 15 December 2016. |
| Other trial notes |
This research paper is an extract from the publication Southern NSW Research Results 2017, available at |
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to
construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol
16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.
