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Common Names Ivy-leaf sida, alkali sida Botanical Name Malvella leprosa (Ort.) Krapov. Status Ivy-leaf sida is one of only fourteen weeds proclaimed as a State Prohibited Weed in Victoria. This is the highest category to which a noxious weed can be allocated and means that ivy-leaf sida is to be eradicated if possible from the State. Origin Ivy-leaf sida is native to western North America and has not established in any other country other than Australia. Description A deep-rooted perennial herb up to 30 cm high with both erect and prostrate stems. Stems- to about 40 cm long, branched, light green, covered with star-shaped hairs. Leaves - 2.5 to 3.5 cm across, sometimes larger; fan-shaped with bluntly toothed margins; on short stalks; covered with star-shaped hairs wich make the plant appear grey-green; veins are prominent underneath the leaves.  Figure 1. Ivy-leaf sida. Flowers - 2.5 to 3.5 cm across, yellow or cream, 5 petals; at the ends of branches on short stalks between leaf stalks and main stems and in loose clusters at the ends of branches.  Figure 2. Flowering stems of ivy-leaf sida. Seeds - dark brown, rounded and generally 2 mm in diameter with a coarse surface, formed in a disc shaped capsular fruit. Roots - creeping; may extend deep into the soil. Life Cycle Ivy-leaf sida reproduces from both seed and buds on the creeping root system. Seed germination and bud growth occur in spring. Topgrowth, produced in spring each year, grows rapidly to produce flowers in summer and dies off in autumn. New shoots emerge from the root system the following spring. Dispersal Ivy-leaf sida seeds may contaminate agricultural or earth-moving equipment and animal hides. Cultivation distributes root fragments which may grow to create a new infestation or spread an existing one. General Ivy-leaf sida is not readily grazed by animals and can compete strongly with pastures, particularly in alkaline soils. The known distribution of ivy-leaf sida in Victoria is in the Pyramid Hill - Cohuna area. It is associated with irrigation channels and irrigated pastures. Chemical Control Under Victorian legislation there are controls on various aspects of the uses of agricultural chemicals. Some particular uses are prohibited and some require permits. Users of certain agricultural chemicals are required to obtain an Agricultural Chemical User Permit (ACUP) or work under the direct supervision of an ACUP holder. Additional restrictions on the use of some herbicides apply to particular geographic areas known as Chemical Control Areas (CCA). It is the responsibility of chemical users to familiarise themselves with these controls. See Agriculture Note: Agricultural chemical user permits (ACUP) and chemical control areas(CCA) for further information. Restrictions on use in CCAs apply to the chemical marked with a hatch(#)in the following list. Contact the Regional Chemical Standards Officer of the Department of Natural Resources and Environment if further advice is required. You should read the product label and follow all label instructions carefully before using any herbicide. Use a product containing the following combination of active constituents that is registered for use in Victoria to control ivy-leaf sida in the particular situation in which you need to use chemical control, eg. in pastures. Consult the product label for detailed information.
This list of chemicals is based on information supplied to the Department of Natural Resources and Environment by the National Registration Authority for Agricultural and Veterinary Chemicals (NRA). The State of Victoria through the Department of Natural Resources and Environment has not assessed or checked the accuracy of the information supplied to it from the NRA as that responsibility rests with the NRA. Important Any person who believes they have located an infestation of ivy-leaf sida, regardless of the area, please notify a Catchment Management Officer at a local office of the Department of Natural Resources and Environment. References
Acknowledgements Prepared by R Williamson; KTRI 1996. Updated by I. Faithfull, KTRI, January 1998. Active constituents information supplied by Chemical Standards Branch December 1997. This note replaces note number PPA0004 The advice provided in this publication is intended as a source of information only. Always read the label before using any of the products mentioned. The State of Victoria and its employees do not guarantee that the publication is without flaw of any kind or is wholly appropriate for your particular purposes and therefore disclaims all liability for any error, loss or other consequence which may arise from you relying on any information in this publication. |
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© The State of Victoria, 1996 - 2008.
This document was published on 26/10/2008.