|Botanical Name||Cytisus scoparius|
|Origin||Europe, Asia Minor, Russia|
DescriptionMuch-branched shrub up to 2-2.5 m high. Twigs green, angled and shiny (silky when young). Pea-like flowers golden yellow, Sep-Apr.
Where is it found?Shrublands, gumlands, consolidated sand dunes, roadsides, gravel pits/quarries, exotic plantations, rough pasture, domestic gardens. Successional impact on forest shrublands possibly to detriment of kauri and tanekaha. Common in the Bay of Plenty.
Why is it a problem?Potential to spread rapidly and out-compete plant species of low shrublands.
How does it spread?Primary sources are gravel pits, quarries, domestic gardens, roadsides and exotic plantations where it is spread by machinery to skid sites and along roads. In these sites it multiplies and spreads to natural communities. Produces seed.
How do I get rid of it?
Dig out plants of all ages.
Spray with selected herbicide in spring-summer.
Rate - Handgun 200-300 ml Triclopyr/100 litres water. Knapsack 20-30 ml Triclopyr/10 litres water.
(ii) Tordon Brushkiller
Rate - Handgun 250 ml Tordon/100 litres water. Knapsack 25 ml Tordon/10 litres water.
Rate - Handgun 35 grams Metsulfuron/100 litres water plus 100 ml Penetrant. Knapsack 5 grams Metsulfuron/10 litres water plus 10 ml Penetrant.
|Two biological control agents have been introduced.
Broom Psyliid (Aryntainilla Spartiophila)
Broom Seed Beetle (Bruchidius Vilosus)
Broom Twigminer (Leucopteru Spartifoliella) was self introduced.
|Recommended Approach||Spray or grub to control all living plants annually. Follow up on young regrowth and seedlings will be required. Check sources of gravel used in track maintenance to ensure it is free of legumes and other weed seeds. When spraying mark sites where future disturbance is possible e.g. roadworks.|