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sowthistle

Catalogue: GRDC Media
SA sowthistle populations confirmed resistant to 2,4-D.. Resistance to the Group I herbicide 2,4-D in sowthistle has been confirmed in South Australia... A major weed of cropping systems north of Dubbo in New South Wales for more than 15 years, sowthistle is now considered a significant emerging weed in southern and western farming systems and will be a focus of the Grains Research and Development Corporation's project on the evolution mechanisms and inheritance of herbicide resistance being led by Dr Chris Preston who is based at the University of Adelaide...
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Catalogue: GRDC Media
Sowthistle is the newest problem weed to show signs of glyphosate resistance in the north... "Individual plants within the suspect populations survived the glyphosate much better than they should have and within two or three weeks some plants were starting to regenerate again," Mr Cook said... "More work is being done to determine whether it is resistance, and if so what level, but it is a timely reminder to maintain diversity when undertaking weed control and to closely monitor weeds after sprays to detect and control survivors," Mr Cook said...
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Catalogue: Broadacre Field Crops DAFF QLD
Sowthistle uses stored soil water during fallows and interferes with crop harvest, adding green matter to harvested grain... Sowthistle plants are erect and fleshy with hollow, smooth stems that exude milky latex when damaged... Sowthistle plants can be either present as a rosette or upright in their growth form...
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Catalogue: Broadacre Field Crops DAFF QLD
Sowthistle uses stored soil water during fallows and interferes with crop harvest, adding green matter to harvested grain... Sowthistle plants are erect and fleshy with hollow, smooth stems that exude milky latex when damaged... Sowthistle plants can be either present as a rosette or upright in their growth form...
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Catalogue: Broadacre Field Crops DAFF QLD
Sowthistle uses stored soil water during fallows and interferes with crop harvest, adding green matter to harvested grain... Sowthistle plants are erect and fleshy with hollow, smooth stems that exude milky latex when damaged... Sowthistle plants can be either present as a rosette or upright in their growth form...
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Catalogue: GRDC Media
Resistance to the Group I herbicide 2,4-D in sowthistle has been confirmed in South Australia... A major weed of cropping systems north of Dubbo in New South Wales for more than 15 years, sowthistle is now considered a significant emerging weed in southern and western farming systems and will be a focus of the Grains Research and Development Corporation's project on the evolution mechanisms and inheritance of herbicide resistance being led by Dr Chris Preston who is based at the University of Adelaide... Dr Preston said recent testing of five sowthistle populations from SA had confirmed three populations resistant to solid rates of 2,4-D...
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Catalogue: GRDC Updates
Ryegrass and sow thistle were evaluated in this project; other weeds such as wild oats, wild radish, mustards, poppy, etc. are also developing resistance in this region... The aim of the project was to capture the current resistance status of a large sample of ryegrass and sow thistle; to key pre-emergent and post emergent herbicides in the western riverina region of SW NSW... What was very interesting was the level of resistance measured in samples with no expected resistance...
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Catalogue: GRDC Media
Annie van der Meulen, a weeds scientist with Queensland's Department of Agriculture and Fisheries has indicated that many populations of common sowthistle across the region can be effectively controlled with glyphosate when treated early and at robust label rates... Speaking at a GRDC Grains Research Update in Goondiwindi earlier this year, Dr van der Meulen urged northern region growers to adopt an integrated approach to ensure the key herbicide, glyphosate, remains effective for common sowthistle control... Dr van der Meulen urges growers to incorporate a range of methods for weed control, including use of non-chemical and agronomic approaches, from rotations to crop competition to herbicides with different modes of action and potentially strategic tillage...
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Catalogue: GRDC Media
Another new glyphosate resistant species confirmed in northern NSW.. Glyphosate resistant population of sowthistle show dead susceptible plants in the right foreground... "Sowthistle and other surface germinating weeds are becoming bigger problems with the widespread adoption of reduced tillage agriculture and an over-reliance on glyphosate," stated Tony Cook, Technical Specialist (Weeds) with NSW Department of Primary Industries and leader of the team that conducted the testing...
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Catalogue: Ground Cover
Dr Michael Widderick, principal research scientist at the Queensland Department of Agriculture, Fisheries and Forestry (DAFF), says research is being conducted to equip growers with options before they find themselves in a situation where glyphosate is no longer useful... "Northern growers have relied on no-till systems for the past few decades, but taking tillage out of the system means that growers are heavily reliant on herbicides for weed control," he says... Dr Widderick says the industry is now having to think outside the square and consider approaches to the herbicide-resistance issue that are new to the northern region - such as harvest weed-seed control options including the Harrington Seed Destructor, chaff carts and windrow burning...
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