Wild Chervil (Anthriscus Sylvestris)
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MANAGEMENT OF A3924-23 Wild chervil (Anthriscus sylvestris) INVASIVE PLANTS IN WISCONSIN ild chervil is an herbaceous plant Similar species: Wild chervil is often that establishes as a rosette with confused with other species in the Brendon Panke and Mark Renz Wfern-like leaves persisting for at parsley family (Apiaceae). A key least one year. Plants flower in subsequent characteristic to distinguish wild chervil years (typically second year), but after from other plants in this family is the plants flower, they die (monocarpic presence of small tooth-like hairs at perennial). Mature plants typically have the top of the flowering stems. Three nvasive plants can thrive a 1–5’ tall stem that is branched, hollow, members of the parsley family that grooved, and hairy with a fringe of hairs are confused with wild chervil are Iand aggressively spread around lower nodes. wild carrot (Daucus carota), sweet cicely (Osmorhiza sp.), and the hedge- beyond their natural range, Legal classification in Wisconsin: Prohibited/Restricted parsleys (Torilis sp.). These plants can be distinguished from wild chervil as they disrupting ecosystems. The Leaves: Stem leaves are pinnately bloom from late spring to early summer, compound, alternate, fern-like, Management of Invasive Plants compared to spring. In addition, wild triangular, and usually hairy on the carrot has large curved bracts under underside, especially along the veins. in Wisconsin series explains how each umbel, sweet cicely has leaves that Total leaf grows up to 1’ long, while each are fragrant when crushed, and hedge- to identify invasive plants and leaf segment is 0.5–2” long. Leaflets are parsley fruit are covered in bristles. provides common management 2–3, pinnately divided, and clasp the stem. Petioles are grooved on upper Ecological threat: options. Management methods surface. Rosette leaves are similar to • Invades forest edges, fields, pastures, stem leaves. fencerows, roadsides, and disturbed recommend specific timings areas. Flowers: Late spring to early summer. for treatment, as well as Creamy white flowers with five notched petals found in flat-topped umbels, expected effectiveness. For more 8–24” across. Each flower is 0.1–0.2” in information, go to: diameter. Fruits and seeds: Narrow fruit are fyi.uwex.edu/weedsci/category/ somewhat wider near the base, smooth, invasive-plants-of-wisconsin. and 0.2” long. Fruits are initially green, turning brown as they mature. Roots: Taproot up to 6’ long. Also reproduces from buds at the top of the root. After parent plant flowers and completes life cycle, these side buds often become independent plants. Cooperative Extension NPM MANAGEMENT OF INVASIVE PLANTS IN WISCONSIN Non-chemical control Prescribed burning Chemical control Effectiveness in season: 50–70% Removal Season after treatment: < 50% Foliar Apply directly to individual plants Effectiveness in season: 70–90% Spring burns can kill germinating seedlings or broadcast across an infested area. Season after treatment: 50–70% and suppress above-ground growth Broadcasted foliar applications are typically of established plants, depending on Pulling and cutting can be effective the most cost-effective treatment in dense fire intensity. After the fire, established individual plant control techniques. Pull infestations. Use lower rates on smaller plants will quickly resprout and reinvade if soil conditions allow for the removal of plants and less dense populations and areas; this management method is not the taproot. However, the deep taproot higher rates on larger plants and denser recommended unless integrated with makes pulling difficult unless the plants populations. All of these treatments are other techniques. A handheld propane are very young. If flowers are present, bag more effective when followed one week torch can be effective for treating material and dispose of it in a landfill to after application by shallow cultivation seedlings. avoid potential for seed spread. Alternately, (to break root collar) and reseeding with cut the entire taproot with a sharp shovel competitive grasses. or spade 1–2” below the surface. Any of Grazing these management techniques will need Effectiveness in season: < 50% aminocyclopyrachlor + metsulfuron* to be employed for at least four years for Season after treatment: < 50% suppression. Effectiveness in season: 90–100% Grazing and trampling by cattle can Season after treatment: 70–90% suppress populations, especially when Common name: Streamline Cultivation grazed in the spring. Wild chervil does not Effectiveness in season: 70–90% invade sites actively grazed by sheep, but Rate: Season after treatment: 50–70% is not suppressed by sheep grazing once broadcast: 4.75–7.6 oz/A (aminocyclopyrachlor: 1.9–3.0 oz a.i./A + Shallow cultivation (to break up root established. Intensive grazing will need to metsulfuron: 0.6–1.0 oz a.i./A) collar), coupled with reseeding of grasses, be maintained for at least four years for spot: 0.2–0.4 oz/gal provides suppression of wild chervil suppression. (aminocyclopyrachlor: 0.08–0.16 oz a.i./ populations and is especially effective gal + metsulfuron: 0.03–0.05 oz a.i./gal) when applied one week after herbicide Cultural Timing: Apply any time the plant is treatments. This management technique Effectiveness in season: 70–90% actively growing and fully leafed out. will need to be employed for at least four Season after treatment: < 50% years for suppression. Caution: Do not apply directly to water Maintain a mulch depth of 3” or more or to areas where surface water is throughout the growing season. Organic present. Avoid using Streamline in areas Mowing or synthetic mulches can be used. This where soils are permeable, particularly Effectiveness in season: 50–70% will suppress current populations, but will where the water table is shallow, since Season after treatment: < 50% have variable success, depending on the groundwater contamination may number of seeds in the soil. Mow at least three times a year after the result. Streamline remains in the soil for flowering stem reaches maximum height, months, depending on application rate, but before the plant flowers. Repeated and has the potential to contaminate mowing is critical as one mowing can surface runoff water, especially on increase seed production from resprouting poorly draining soils or areas with plants. Care must be taken not to mow shallow groundwater. Maintenance of a when mature seeds are present since this vegetative buffer strip is recommended will spread the seed. At least four years of between the areas Streamline is applied mowing will be necessary for suppression. and surface water features. Overspray or drift to desirable plants should be avoided since even minute quantities of the spray may cause severe injury to plants. Do not compost treated plants since herbicide can persist through composting process. 2 WILD CHERVIL chlorsulfuron* dicamba* imazapyr* Effectiveness in season: 70–90% Effectiveness in season: 70–90% Effectiveness in season: 90–100% Season after treatment: 70–90% Season after treatment: 50–70% Season after treatment: 70–90% Common name: Telar Common name: Banvel Common name: Arsenal Rate: Rate: Rate: broadcast: 0.25–0.5 oz/A broadcast: 32–64 fl oz/A broadcast: 48–64 fl oz/A (0.2–0.4 oz a.i./A) (1.0–2.0 lb a.e./A) (0.75–1.0 lb a.e./A) spot: 0.04 oz/gal (0.03 oz a.i./gal) spot: Equivalent to broadcast rates. spot: 0.5–2% (0.01–0.04 lb a.e./gal) Timing: Apply any time the plant is Timing: Apply during early flowering Timing: Apply any time the plant is actively growing and fully leafed out. stage or to rosettes as long as leaves are actively growing. Caution: Do not apply directly to water green. Most effective when applied to Caution: Use product labeled for aquatic or to areas where surface water is rosettes in the spring or fall. use if potential exists for solution to present. Can remain in the soil for Remarks: If applying after rosette stage, contact surface waters. Applications can months, depending on application rate. mow plants and spray regrowth and result in bare ground since imazapyr Overspray or drift to desirable plants flowers. is not selective and can remain in the should be avoided since even minute Caution: Do not apply directly to water or soil for several months to more than quantities of the spray may cause severe to areas where surface water is present. a year, depending on application rate. injury to plants. Use of this chemical in areas where Overspray or drift to desirable plants soils are permeable, particularly where should be avoided since even minute clopyralid* the water table is shallow, may result in quantities of the spray may cause severe injury to plants. Effectiveness in season: 70–90% groundwater contamination. Overspray Season after treatment: 50–70% or drift to desirable plants should be avoided since even minute quantities metsulfuron* Common name: Transline of the spray may cause severe injury Effectiveness in season: 90–100% Rate: to plants. Rates > 16oz/A (0.5 lb a.e./A) Season after treatment: 70–90% broadcast: 10–16 fl oz/A may cause stunting and discoloration of Common name: Escort (0.25–0.4 lb a.e./A) sensitive grasses, such as smooth brome. spot: 0.2–0.4% (0.005–0.01 lb a.e./gal) Rate: Timing: Apply during early flowering glyphosate* broadcast: 0.3–1.0 oz/A stage or to rosettes as long as leaves are (0.2–0.6 oz a.i./A Effectiveness in season: 70–90% spot: 0.04 oz/gal (0.03 oz a.i./gal) green. Season after treatment: 50–70% Caution: Do not apply directly to water or Timing: Apply any time the plant is Common name: Roundup to areas where surface water is present. actively growing and fully leafed out.