Don’s Expert Answers: eliminating invasive weeds

Question From: 
stuart jackson in  freshwater,  cairns QLD

 

Nature of problem: 
eliminating invasive weeds

 

Type of Plant (if known): 
singapore daisy

 

Symptoms of Plant Illness (please try NOT to diagnose your problems yourself): 
healthy

 

Soil Type (e.g. sandy, clay or loam) OR Potting Mix Type: 
friable rocky clay – steeply sloping

 

How often do you water the plant:
never

 

How many hours of sunlight does the plant get each day:
mostly shaded, sun for several hours only

 

What type of plant is it:
singapore daisy – invasive weed

 

How long since you planted it:
apparently has existed for several years

 

Have you fertilised? If so, with what and when:
na

 

Is the plant indoors or outdoors: 
outdoors

 

Is the plant in a pot or in the ground: 
ground

 

What other treatments have you given the plant: 
none

Upload photo if available: 

Other Comments: 
we have purchased a steeply sloping block of land that is mostly covered with light forest. the driveway cutting is blanketed in singapore daisy, being a total area of 1.5hectares of weed. there is a gully & periodic water course beside the driveway. we wish to eliminate the daisy, but are concerned about spraying with herbicide for fear of runoff; poisoning of the soil, frogs, etc

can you advise if there is a safe spray we could use
or alternate method for removal of this large area of weed to minimise regrowth

 

Answer: Hi Stuart,  Spray with Roundup Biactive available from rural produce stores like Elders. This form of glyphosate is very safe around waterways.  Don