Dragonfly Environmental

Weed of the Week: Giant Fleabane

Leave a comment

Giant Fleabane

Giant Fleabane

After the Deb, Monique and Jen came across this skyscraper Fleabane we had to acknowledge it as our weed of the week!

So what it is and where does it come from? Lets see what the NSW Department of Agriculture says about it…

There are three main species of fleabane in Australia:

1) C. bonariensis (flaxleaf fleabane)
2) C. canadensis (Canadian fleabane)
3) C. sumatrensis (tall fleabane). Of the three species, flaxleaf fleabane is the most common across Australia.

– Flaxleaf fleabane can grow up to 1 m tall and has deeply indented leaves. Its branches often grow taller than the main plant axis

– Tall fleabane can grow up to 2 m tall. Its leaves are less indented than flaxleaf fleabane and its branches do not grow taller than the main plant axis

– Fleabane is a prolific seed producer, each plant producing up to 110,000 seeds! and of these, up to 80% can be viable. The seeds do not possess dormancy so they can germinate whenever temperature and moisture requirements are met. Prevention of seed-set is vital for control

– Inconsistent control is often obtained with herbicide treatments, especially once plants exceed a diameter of 30 mm

– Often fleabane germinates under a winter crop after the normal application time for post-emergent herbicides. The plants develop unobserved until harvest, when they begin to elongate for flowering. The harvest machinery cuts the tops off the plants but they survive in the summer fallow as woody deep-rooted plants with little leaf area to absorb herbicides. It is uneconomical to control these surviving plants with herbicides. However, if left unchecked, they continue to produce seed through the summer.

Dragonfly Environmental

Author: Geraldene

I'm passionate about People and their Connection to the Natural World. To supporting projects and ideas that result in Earth Care and harmony. I'm very interested in Indigenous Wisdoms. I'm a mum of two lovely kids, daughter and friend. I love travelling and meeting people. I am keen on being responsible and creating the world around me.

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s