WebScotch thistle, a class-B noxious weed in Lincoln County, Washington (Onopordum acanthium) of the As-teraceae (Sunflower) family. It is also known as cotton thistle, and derives from Eurasia. Scotch thistle is a branched, robust biennial (or sometimes annual) that often grows 8 feet or more in height and 6 feet in width. Main stems may be WebThe best method for control of spear thistle is to encourage competition from useful plants. Vigorous pasture restricts seedling establishment and growth, and management practices …
Scotch thistle – Weeds of agriculture - Te Ara
WebNative to the UK. Yes. Foliage. Deciduous. Habit. Bushy. Genus. Onopordum are are upright biennials with a basal rosette of simple or pinnately lobed, grey-hairy leaves and large, thistle-like, pink or purple flower-heads in summer. Name status. WebTordon 242 also registered for variegated thistle, but this is residual and can reduce clover for at least one year. Herbicide: Glyphosate + 2,4-D ester (various trade names: see APVMA link) Active ingredient. 360g/L glyphosate (Group M) + 600, 680g/L 2,4-D LV ester (Group I) Other concentrations of glyphosate available. Rate of product/ha. tap gland toolstation
Factsheet - Cirsium vulgare (Spear Thistle) - Lucidcentral
WebProvides all-purpose noxious weed control, as well as basic invasive weed management. ... Tordon 22K is active on most noxious and invasive weeds, including biennial thistles, perennial Canada thistle, knapweeds, yellow starthistle and many others. Tordon 22K is the best leafy spurge control available and is an excellent choice for field ... The content provided here is for information purposes only and is taken from the Biosecurity Act 2015and its subordinate legislation, and the Regional Strategic Weed … See more WebScotch thistle. Overgrazing promotes Scotch thistle. Fire is not an effective control. Promoting competitive vegetation can slow spread and help prevent establishment. … tap gland spline height