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Catalogue: GRDC Updates
Herbicide control of fleabane is difficult because it has a natural tolerance to herbicide uptake and is often targeted over summer when plants are well established and spray conditions are not favourable... In southern New South Wales it emerges through winter and early spring, whereas recent studies have found that populations from South Australia emerge as late as August to November, provided moisture is not limiting (see Figure 1)... The impact of fleabane control on stored soil moisture was also assessed in April for a selection of treatments at Bute and Pinnaroo (Figure 3.)...
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Catalogue: GRDC Updates
A definition of double knock is required for those people unfamiliar with the technique... An experiment commenced at Dalby Ag College in November 2006, investigating double knock with combinations of glyphosate and paraquat... As can be seen from Table 1, a single application of either glyphosate or paraquat on pre-tillering barnyard grass (1 st knock) often results in excellent control but usually there are a few survivors...
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