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Japanese Sunflower Tithonia Diversifolia

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Japanese Sunflower Tithonia Diversifolia Invasive plant Japanese sunflower Tithonia diversifolia Japanese sunflower is native to Central America. It is a Legal requirements serious environmental weed, forming dense thickets and out-competing native vegetation. Japanese sunflower is not a prohibited or restricted invasive plant under the Biosecurity Act 2014. However, Japanese sunflower is commonly a weed on roadsides by law, everyone has a general biosecurity obligation and embankments in coastal Queensland and northern (GBO) to take reasonable and practical steps to minimise coastal New South Wales. It is widespread and common the risks associated with invasive plants under their in far north Queensland, particularly on roadsides, control. embankments, unmanaged lands and fire degraded hillsides. Local governments must have a biosecurity plan that A similar species Tithonia rotundifolia is known as Mexican covers invasive plants in their area. This plan may include sunflower. This weed is smaller in height and flower size, actions to be taken on certain species. Some of these and its distribution as an environmental weed is similar to actions may be required under local laws. Contact your Japanese sunflower in Queensland but not as common in local government for more information. New South Wales. Description situations specified on the product labels. A permit held by the Department of Agriculture and Fisheries allows Japanese sunflower stands up to to 3 m. Flowers are people generally to use some herbicide products to control sunflower-like heads up to 10 cm across, with yellow flower Japanese sunflower as an environmental weed in various centres and reddish-orange petals 4–5 cm long. The stems situations. are bushy, with five-lobed, serrated hairy leaves, between 6–15 cm in length and 5–12 cm in width. Leaves are pale See Table 1 for the treatment options in situations allowed green five-lobed, serrated and hairy, and between 6–15 cm by the permit. in length and 5–12 cm in width. Tapered leaf blades, Prior to using the herbicides listed under this permit 6–33 cm long, 5–22 cm wide. (PER11463) you must read or have read to you and Mexican sunflower leaves have five broad round-toothed understand the conditions of the permit. To obtain a lobes and yellow flower centres with reddish-orange copy of this permit visit apvma.gov.au. petals. Further information Management strategies Further information is available from your local government Japanese sunflowers can be dug out or chipped where office, or by contacting Biosecurity Queensland on infestations are small. 13 25 23 or visit biosecurity.qld.gov.au. Herbicide control There are a number of herbicides currently registered for the control of Japanese sunflower in Queensland in the Table 1. Herbicides for the control of Japanese sunflower Situation Herbicide Rate Comments Agricultural non-crop areas, Triclopyr 300 g/L + picloram 350 mL per 100 L water Foliar spray commercial and industrial areas, 100 g/L (e.g. Conqueror) or pre-flowering plants forests, pastures and rights-of- Triclopyr 300 g/L + picloram Registered way 100 g/L + aminolpyralid 8 g/L (Grazon Extra) Non-agricultural areas, domestic Metsulfuron-methyl 600 g/kg 10 g per 100 L water Spot spray and public service areas, (e.g Associate, Ken-Met 600 WG) plus wetting agent APVMA permit commercial and industrial 2,4-D amine (500 g/L) 4 mL per 1 L water PER11463 areas, bushland/ native forests, Permit expires roadsides, rights of way, vacant 30/06/2023 lots, wastelands, wetlands, dunal 2,4-D amine (625 g/L) 3 mL per 1 L water and coastal areas. Read the label carefully before use. Always use the herbicide in accordance with the directions on the label. This fact sheet is developed with funding support from the Land Protection Fund. Fact sheets are available from Department of Agriculture and Fisheries (DAF) service centres and our Customer Service Centre (telephone 13 25 23). Check our website at biosecurity.qld.gov.au to ensure you have the latest version of this fact sheet. The control methods referred to in this fact sheet should be used in accordance with the restrictions (federal and state legislation, and local government laws) directly or indirectly related to each control method. These restrictions may prevent the use of one or more of the methods referred to, depending on individual circumstances. While every care is taken to ensure the accuracy of this information, DAF does not invite reliance upon it, nor accept responsibility for any loss or damage caused by actions based on it. © The State of Queensland, Department of Agriculture and Fisheries, 2020. 02/20.
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