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nematode

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Catalogue: Ground Cover
Variety choice and crop rotation key to managing root lesion nematodes.. All growers in the northern region should presume they have nematodes in their paddocks, says Alex Gwynne, a grain grower on the Darling Downs, Queensland... "Unless there are other major agronomic advantages to growing these varieties," Mr Daniel says, "growers should be avoiding them where P. thornei is known to be an issue."..
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Catalogue: Ground Cover
Yellow spot is caused by a fungus ( Pyrenophora tritici-repentis ), which survives between crops on wheat stubbles... Dr Simpfendorfer is concerned that many growers and advisers believe they can control yellow spot with fungicides, as they do for stripe rust, even though the research clearly shows this is not the case... Once the fungicide wears off in a leaf, after about three weeks, it can get rapidly reinfected off the stubble if there are moist conditions."..
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