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Orange hawkweed control program

Orange hawkweed is a noxious weed in Kosciuszko National Park, threatening Australian native plants and biodiversity. The orange hawkweed control program involves volunteers surveying infestation sites in the park, and then removing flowering heads and applying herbicides to reduce density and help to prevent spread.

Read more about Orange hawkweed control program

Orange hawkweed might have attractive flowers, but in NSW, it’s a serious noxious weed. In fact, it’s on the National Environmental Alert List, a list of 28 non-native plants that are at the early stages of invasion, but could be a major threat to biodiversity if not managed. It’s also recognised as a National Agricultural Sleeper Weed, given its significant impacts to grazing lands in New Zealand and North America.

Orange hawkweed was discovered in Kosciuszko National Park in 2003, and, since then, an orange hawkweed control program has sought to reverse its spread, including to adjoining grazing land. There is evidence this is working too – volunteers have helped with intensive monitoring surveys to find plants. The following application of herbicide that has reduced infestations to less than 4 per cent of the original size. 

It’s a long process, but the control program has contributed to our understanding of plant biology and provided information that increases the likelihood of success in the future.

Parks related to this program

High Plains, Kosciuszko National Park. Photo: Murray van der Veer