Container - grown ornamental want to be weed - free as gage competition can reduce the overall growth and market value of the ornamentals , and for aesthetics . Oxalis ( Oxalis stricta ) , also love as jaundiced woodsorrel , is one of the most common broadleaf weed species in container nurseries and nursery in Michigan . Oxalis is difficult to control because it can spread by rhizomes , stolons and by ejaculate , which have no sleeping requirement . It is native to North America and is widely mete out throughout the creation . Oxalis maturate by nature in timber , grasslands , maladjusted areas and turf . In nurseries and nursery , it can be found acquire in the drainage holes of containers , container nursery broth or on the Earth’s surface of container spiritualist ( see pic ) under both full sun and fond sunshine weather .
A mature yellow woodsorrel ( Oxalis stricta ) grow on container spiritualist aerofoil inside a glasshouse . Photo by Debalina Saha , MSU Horticulture .
Oxalis is herbaceous and normally grows upright with extensive branching but may also grow level along the soil surface . The cotyledons of the seedling have a pinkish tint with alternate trifoliated leaves . The primary ascendant system structure is a pat ascendant , although rhizome ( cloak-and-dagger radical ) can also forge secondary fibrous root structure . The stems are indulgent , herbaceous and clean green . leaf are alternative , palmately chemical compound , with unruffled leeway and heart - mold pamphlet . Flowers are small , bright yellow with five petals and blooms from spring through fall , according toLollar and Marble , 2015 . The seedpod ( yield ) of oxalis are ejector seat that resemble the shape of okra pods .
A single oxalis flora can produce up to 5,000 seed per yr and have an almost 100 % sprouting rate immediately after dispersal . Oxalis seeds are photoblastic , meaning they require light for germination , and the optimum temperature requirement for sprouting swan from 50 to 84 degrees Fahrenheit .
near recitation for managing yellow woodsorrel in container production take a combination of weed killer program along with proper cultural and sanitization practices . Several preemergence and postemergence weed killer labeled for use in ornamental production have depict effective control of this weed mintage . In addition , sure herbicide have even resulted in early postemergence mastery of oxalis in container production .
AMichigan State University Extensionbulletin , “ place and manage Yellow Woodsorrel ( Oxalis Stricta L. ) in Nurseries and Greenhouses , ” has been developed where identification and management strategies of yellow woodsorrel for container product has been discourse . This bulletin can be a useful resource for baby’s room growers and nursery operators to choose the right method for controlling oxalis according to their production arrangement .
Source : Michigan State University ( Debalina Saha and Heidi Lindberg )
