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Transcript
ED/11/26090 T.I.P.S. Targeted Invasive Plant Species Family: Brassicaceae Other Names: Sand Mustard, Sand Rocket Legal Status Distribution Only one occurrence of Sand Rocket was found on a roadside in the Shire Identification Flowers: It displays small bright yellow flowers on short flowering stems from October to February. Each has only four petals, spread out in the shape of a Maltese cross. Stems: Hairless stems and leaves from 20-80 cm high. Leaves: The leaves are lance shaped, up to 15 cm long with irregular lobes. They are mainly confined to the lower parts of the stems and rosette. With a foul smell when crushed. Fruit: The fruit is a pod from one to four cm long by five mm diameter with a small beak-shaped end, the seeds are arranged in two rows. The part nearest the stem opens first, shedding seed. Fruit: A long tap root which utilises water from deep underground Germination: Seeds germinate in autumn and make slow growth through winter. In the spring they grow more rapidly, flowering in October. In autumn the top growth dies back until next spring. Ecological Characteristics Habitat: Warm-temperate regions, preferring porous calcareous soils, may be found in limestone. It is a weed of neglected areas, roadsides, railway easements and pastures Sand rocket invades dry coastal vegetation, lowland grassland and grassy woodland, riparian vegetation and rock outcrop vegetation. Dispersal: Sand Rocket is spread mainly by seeds, although cultivation may break off root fragments, which if large enough, can regenerate to produce new plants. The Seeds can be dispersed on or through the digestive system of birds, wildlife, and livestock. Seeds can also be spread in mud caught in tire tread or undercarriages of vehicles or machinery. Sand Rocket . Diplotaxis tenuifolia At this stage Sand Rocket isn’t a declared noxious weed in NSW. Though every attempt should be made to rid properties of this weed. Impacts Biocontrol Economic: Unknown Sand Rocket is said to be poisonous but stock genFurther Reading erally ignore it except at flowering, due to its www.dip.vic.gov.au marked "foxy" odour. If eaten as hay, it will taint www.agric.wa.gov.au milk and meat. Toxicity is unknown. www.pir.sa.gov.au Effects: It strongly competes with crops and use- Further Information ful pasture plants and the wiry stems make hay cut- Contact Council’s Vegetation Management Office on ting difficult. 02 6451 1180 Ecological: Infestations can decrease forage for wildlife and decrease local plant biodiversity. Sand Rocket . Diplotaxis tenuifolia Prevention Maintain a dense, grassy pasture. Manage activities such as grazing, road construction and maintenance, and harvesting appropriately to maintain or establish healthy, competitive plant communities that are resistant to invasion by invasive plants. Monitor treated sites for several years to facilitate early detection of new plants emerging from the seed bank or portions of remaining roots. Clean equipment, vehicles, animals, and clothing before leaving infested areas. Mechanical Control Pulling may be an effective control method for small infestations Pulling or digging should be performed before seeds mature and while soil is moist. If seeds are mature, cut and bag seed heads prior to mechanical control. Ploughing/harrowing and seeding with grass species appears to be effective for large infestations Chemical Control There is currently no known herbicide registered for Sand Rocket in NSW.