The Department of Primary Industries and Regional Development will outline the latest research into pre-emergent herbicides and inversion tillage at Western Australia’s premier grains event next month.
Research officer Tom Edwards has been invited to discuss understanding interactions between pre-emergent herbicides and inversion tillage at the 2018 Grains Research and Development Corporation (GRDC) Grains Research Update, Perth.
Department researchers have been examining how inversion tillage eliminates soil water repellence and leads to better germination and soil fertility and allows improved incorporation of lime to decrease acidity.
Research undertaken by the department as part of the soil water repellence project with GRDC’s Soil Constraints West initiative shows that while there are benefits from using this practice, there can be some additional management considerations.
“It drastically changes the soil surface environment, which can affect how the soil will interact with herbicides,” he said.
Mr Edwards collaborated with department herbicide expert John Moore to trial pre-emergent herbicides and confirmed that under particular conditions some show increased phytotoxicity (how strongly they act) and this can lead to crop damage.
“There are complex interactions between soil type, rainfall, crop type and the active chemicals so currently it is difficult to accurately predict the risk of damage in each situation,” Mr Edwards said.
“More research is needed so that we can be confident about which herbicides are best suited and how to incorporate the benefits of tillage with effective weed management.”
The 2018 GRDC Research Update, Perth will be held on 26 and 27 February at Crown Complex. Regional update events are being held at Northampton on Friday, February 23, Darkan on Wednesday, February 28 and Corrigin on Thursday, March 1.
For registrations and further information, go to the Grains Industry Association of Western Australia website giwa.org.au/2018researchupdates
Jodie Thomson/Katrina Bowers, media liaison, +61 (0)8 9368 3937/3789