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Evaluation of Chemical and Physical Control Methods for the Control of Giant Hogweed (Heracleum mantegazzianum Sommier & Levier)

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dc.contributor.advisor Tardif, François Grguric, Meghan 2018-05-18T19:00:47Z 2018-05-18T19:00:47Z 2018-05 2018-05-14 2018-05-18
dc.description.abstract The invasiveness and potential health effects of giant hogweed warrant the evaluation of improved chemical and physical methods for the management of this weed. Herbicides were applied as either a broadcast spray or as a stem injection. Broadcast application of aminopyralid/metsulfuron-methyl, aminopyralid/metsulfuron-methyl+fluroxypyr-meptyl, triclopyr and picloram controlled giant hogweed as effectively as the standard treatments glyphosate and aminocyclopyrachlor/chlorsulfuron and reduced seedling recruitment. Injection of triclopyr, aminocyclopyrachlor/chlorsulfuron and aminopyralid/metsulfuron-methyl were less effective than glyphosate at visible injuring seed. Cuttings of giant hogweed flowering stems was done at different stages and frequencies. Cutting during seed set prevented regeneration from occurring. Shoot removal before or at flowering allowed regeneration, demanding extra cuttings. Seed production from regenerated shoots was only 2% or less that of untreated plants. Best practices for giant hogweed management should include an early spring broadcast application followed by herbicide injection or stem cutting in late spring or early summer when flowering. en_US
dc.description.sponsorship University of Guelph, Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA), Dow AgroSciences en_US
dc.language.iso en en_US
dc.subject Giant hogweed en_US
dc.subject Heracleum mantegazzianum en_US
dc.subject Physical control en_US
dc.subject Herbicides en_US
dc.subject Chemical control en_US
dc.subject Invasive en_US
dc.title Evaluation of Chemical and Physical Control Methods for the Control of Giant Hogweed (Heracleum mantegazzianum Sommier & Levier) en_US
dc.type Thesis en_US Plant Agriculture en_US Master of Science en_US Department of Plant Agriculture en_US
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