To assess current and novel herbicides and mixes at elevated rates to achieve fast control of summer weeds through weedseeker selective spot spraying..
To plant trial plots to wheat to assess carryover or plantback issue with these treatments.
Key messages
Weed sensing and selective spot spraying with machinery such as the WEEDSEEKER and WEED-IT selective spot sprayers has allowed for very cost effective broadacre spot spraying of weeds without spraying the whole pad-dock area.
Selective spot spraying of hard to kill summer weeds is one application where this technology has a potential to save growers significant funds usually allocated to herbicides.
Elevated rates of non-traditional or previously cost prohibited herbicides of a different resistance group can now be used to achieve much more reliable and faster control of weeds.
Alliance, Gramoxone, Basta, Roundup Powermax and Ally provided acceptable levels of control on large Roly Poly at high rates suitable for selective spot spraying.
Hammer and Sharpen did not provide acceptable control of Roly Poly after initial impressive weed burndown.
Roundup Powermax, Garlon, Grazon, Kamba 500 and Tordon 75D all provided excellent Afghan Melon control.
Grazon, Kamba 500 and Tordon 75D caused herbicide toxicity issues in the wheat crop as per trial report.
No observed climate data available for this trial. Derived climate data is
determined from trial site location and national weather sources.
Mullewa WA
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.
