Bur daisy

Common name: Bur daisy

Botanical name: Calotis lappulacea

Management programme: Progressive containment

                

Why is it a pest?

While some daisies make nice daisy chain necklaces, bur daisy is a serious threat to farming as it can contaminate sheep wool. If left uncontrolled, bur daisy replaces other plant species and this has a negative impact on our biodiversity. It produces many seeds that are quickly spread by stock movement and can produce new plants for many years.

               

What does it look like?

Bur daisy is a small herb that can grow up to 40cm tall with many fine, green branches. It has thin green leaves that are very small. The plant produces small, pom pom-like clusters of bright yellow flowers that develop into very hard, brown burs, covered in tiny hooks.

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Progressive containment programme

The progressive containment programme aims to stop a pest from spreading and/or contain it to a certain area.

 

 

When can I spot it best?

Bur daisy flowers for most of the year but more over summer. So far it has only been found on one 10-hectare block of land at near Georgetown in the Waitaki Valley.

              

What are the rules?

There is only one rule for bur daisy under our pest plan which is that everyone in Otago must eliminate bur daisy on the land they occupy. This is to ensure the number of plants are reduced and threats to economic wellbeing are minimised.

                 

How can I control it?

  • You can grub out small plants, being careful to collect all seed heads
  • You can weed wipe using a glyphosate-based herbicide
  • You can spray the plant during spring using Tordon BK or triclopyr and a penetrant.

Caution: When using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.

Disclaimer: Mention of product trade names does not endorse these products nor imply criticism of similar products not mentioned. The Otago Regional Council does not give any warranty that the information is accurate or complete or that it is suitable for all circumstances.

            

Images

                      

            

                 

                 

            

Defintions

Eliminate – The permanent prevention of the plant’s ability to set viable seed.

Land occupier – An occupier is the person who physically occupies the place, whether they own it or not. For example if you are renting a house owned by someone else that does not live on that property, you are the occupier and are responsible for pest management under the pest plan. You can see more about the responsibilities of occupiers (including owners) in section 3.3.1 of the pest plan.

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