Mugwort seedlings
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Waste material can be crushed, burned or composted so long as management was completed prior to seed set.
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Mugwort seeds are viable for three to four years: after control is achieved, if achieved at all, the site should be inspected for at least this long to manage any newly emerged seedlings or sprouts. (13)ĭepending on the management method employed, controlled populations should be revisited throughout the growing season for repeat management activities. For very small infestations, cutting and spot spraying or careful hand pulling- making sure to extract as much of the rhizome as possible- will eventually achieve eradication. Plants should be mowed at least twice prior to foliar applications, and at least two applications will be necessary during the first year of control, ideally beginning in late spring. Sequential mowing coupled with sequential herbicide treatments will provide the highest rate of control. General management overview and recommendation Always read and follow all instructions on the herbicide label. Higher rates of control (80%-90%) can be achieved with picloram and clopyralid as opposed to glyphosate, which needs higher concentration levels and at least two applications to achieve 70%-80% control. Always thoroughly read the label of any pesticide and consult the NYSDEC or a licensed pesticide applicator with questions.įoliar Spray: Mugwort is tolerant to a variety of herbicides and generally requires repeat applications to achieve suppression or control. At times, the pest you seek to treat may not be on a pesticide label, requiring a 2ee exemption from NYSDEC. (4) The species does produce plenty of viable seed. When considering the use of pesticides, it is your responsibility to fully understand the laws, regulations and best practices required to apply pesticides in a responsible manner. Mugwort primarily spreads locally via underground rhizomes, although sexual reproduction is possible. The pesticide application rates and usage herein are recommendations based on research and interviews with land managers. Tilling may fragment roots and encourage re-sprouting and vigorous growth. Prescribed Grazing: Mugwort is not palatable to livestock Prescribed Fire: Studies suggest Mugwort’s underground rhizomes provide some level of fire tolerance to the species, although little research exists on this topic. If mowing is utilized as a management method it must be completed before fall seed set. (12) For greatest effectiveness, mowing works best in conjunction with chemical control. Mowing: Mugwort is highly tolerant of mowing, although at least three mowings per year for at least two years does decrease infestation size by approximately one fifth.
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Pulling / Digging Up: Pulling by hand is an ineffective method of control and may even stimulate increased growth due to rhizome fragmentation. The stem boring fly, Oxyna parietina is a possible candidate for biological control, although its use has not yet been approved.