It is difficult to control because its extensive root system allows it to recover from control attempts. Barren patches of turf provide an ideal germinating for wind-dispersed thistle seeds. Although thistle is technically a herbacious plant of the daisy family, it’s also classified as a Noxious Weed in many states, meaning it’s harmful enough to warrant government-regulated control. Creeping Thistle is the most common thistle species in the U.S. The Creeping thistle is our most common species of thistle and can be found on disturbed and cultivated ground, such as rough grassland, roadside verges and field edges from June to October. •Creeping thistle (Cirsium arvense) is the most common perennial thistle to invade both grass and arable land •It spreads rapidly and forms large patches that compete with crops, interfere with harvesting and reduce yields Canada thistle is a creeping perennial that reproduces from vegetative buds in its root system and from seed. Instead of growing on stems, Dwarf Thistle grows a rosette of leaves. Chemical control of creeping thistle should be part of an integrated management approach which include, where feasible, cultivations, mowing or grazing, and competitive crops. Method of thistle control. Objective. The most common thistle species, Canadian or creeping thistle (Cirsium arvense), is found throughout the U.S. Good to Know, How Thistle Grows Don’t let the flowers dry out because they’ll spread thistle seeds. This variety of thistle grows by spreading, giving it the nickname creeping thistle. Creeping Thistle Management Strategies in Organic Systems Why is creeping thistle a problem for farmers? Canada thistle is a creeping perennial that can be controlled with fall spraying, in conjunction with other management options in the spring. If you’re dealing with creeping thistle, it’s best to cut it when it reaches 4 to 6 inches (10 to 15 cm) long. Preferred habitat: Creeping Thistles favour newly sown lawns. Where infestations of creeping or spear thistle are small, bird nesting is not an issue, equipment and labour are available and where total control is neither desirable nor necessary. Creeping thistles generally have a varied response to herbicide treatment, as there is much variation within the species including the rooting system and growth habit. By following some rules of plant cultivation, in combination with direct methods, it can be effectively controlled. Creeping thistle (Cirsium arvense) has become an increasing problem particularly on organic arable farms with soils of higher organic matter content.It competes with crops for water and nutrients and once established, mechanical removal is difficult. Control: As we have previously stated this weed is more of a problem in newly sown lawns and … Combining control methods is the best form of Canada thistle management. Cutting by tractor-mounted cutter, scythe or strimmer. It prefers recently disturbed/cultivated grounds (such as vegetable gardens), road side and field edges, and other patches of relatively barren soil. The Control of Creeping Thistle (Cirsium arvense) The species has fewer spines on the margins of the first leaves than the other thistles. Like Creeping Thistles, the leaves are similar to Dandelions and spiky but they’re pretty much hairless. Timing of cutting is crucial. Suitable situation. Growing from the centre of this rosette of leaves is the reddish purple flower which blooms between June and September. Typically, this will happen around early June. Another thistle to look out for is Canada thistle. Flower: Creeping Thistle flowers form in clusters, are a lilac/purple colour and can be seen from June to September. Its creeping roots enable it to quickly spread across an area, forming large colonies. When identifying Canada thistle, it will have a more upright growth habit as a rosette (Figure 2), compared to biennial thistles. 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