Monday am
Peter Botsalis resistance testing from quick test.
Moderate to high resistance through SA cropping region with ryegrass, brome grass, wild oats and wild mustard .
Annual ryegrass trifluralin resistance populations @ 50 - 75% in most cropping districts.
Random surveys of ryegrass throughout cropping regions have glyphosate resistance @ 15%. These surveys do not include fence lines.
In the SE of SA, ryegrass populations resistance to all chemical groups , glyphosate @ 30%
Screening new pre emergent herbicide for ryegrass in canola, new chemical group. Release 3- 5 years.
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