Amanda Cook (SARDI)
|Contributor||SARDI Minnipa Agricultural Centre|
Site 19, Minnipa Agricultural Centre, SA
Barley grass continues to be a major grass weed in cereal cropping regions on upper Eyre Peninsula (EP). The use of unmanned aerial vehicle (UAV) technology to identify and assess barley grass populations in paddocks and monitor potential resistant populations may be a useful tool for farmers. Barley grass weed density was monitored in three paddocks on upper EP (Minnipa Agricultural Centre (MAC), Heddle’s at Minnipa and Wilkins’ at Yaninee using an UAV during the 2017 (EPFS Summary 2017, p 83) and 2018 growing seasons at three different timings, with paddock transects conducted to verify grass weed density in paddocks.
|Lead research organisation||
SARDI Minnipa Agricultural Centre
|Host research organisation||N/A|
|Trial funding source||SAGIT S117|
This research was funded by SAGIT S117. Sincere thanks to SAGIT and their extremely valuable input into regional South Australian research and researchers and keeping people in jobs. Thank you to Bruce Heddle and Wilkins families for having the research and monitoring on their property.
|Other trial partners||Not specified|
In-crop paddock monitoring for grass weed populations
Grass weeds were assessed in crop or pasture at eight paddock-marked GPS points, and in 2018 also marked in the paddock with a large corflute sign visible in the imagery, with six or more counts taken at each sample point and each timing during the season. This was used to verify the UAV data captured at three times during the cropping season. Extra sampling points in the paddock were targeted if more information was needed to verify the imagery. The paddock photos were captured on an iPad with ‘Avenza Maps’ linked to the location in the paddock.
In 2018, grass weed assessments were undertaken on:
|Sow date||Not specified|
|Harvest date||Not specified|
|Plot size||Not specified|
|Plot replication||Not specified|
|Rainfall avg ann (mm)||325mm|
|Rainfall avg gsr (mm)||241mm|
|Rainfall trial total (mm)||181mm|
|Rainfall trial gsr (mm)||156mm|
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.