| Researcher(s) | N/A |
|---|---|
| Year(s) | 2019 |
| Contributor | Northern Grower Alliance |
| Trial location(s) |
Goondiwindi, NSW
|
To evaluate alternative second knock options for grass weeds
The trial was conducted near Goondiwindi on a population of ~6 barnyard grass/m2. Majority of weeds were at flag leaf emergence with first flowers visible on ~20% of the population. Average weed size was ~20cm diameter and 15cm tall.
The 1st knock application was applied commercially (Roundup + Clethodim + Starane + LVE + Banjo) with 2nd knock treatments applied 8 days later.
All 2nd knock treatments significantly increased % weed burndown, when assessed 5 days after application with Gramoxone 2.4 L/ha providing significantly increased burndown compared to all other treatments.
Assessment of regrowing barnyard grass was conducted 28 days after the 2nd knock application. The 1st knock alone had provided ~85% control with no significant improvement in control from any 2nd knock treatment. In this situation, when sprayed on advanced barnyard grass growth stages, there was no significant improvement in control from any 2nd knock treatment.
| Lead research organisation | N/A |
|---|---|
| Host research organisation | N/A |
| Trial funding source | GRDC NGA00004 |
| Related program | N/A |
| Acknowledgments | N/A |
| Other trial partners | Not specified |
| Crop type | Weed: Other grass |
|---|---|
| Treatment type(s) |
|
| Trial type | Experimental |
| Trial design | Randomised,Replicated,Blocked |
| Sow date | Not applicable |
|---|---|
| Harvest date | Not applicable |
| Plot size | Not specified |
| Plot replication | Not specified |
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.
