Wetting Agent For Lawn

Question From: 
LW in  ashford,  adelaide SA


Nature of problem: 
I have a santa anna couch lawn & was recommend brush off/metmac (metsulfuron methyl) for controlling/killing oxalis. I have bought a 200g bottle of Metmac 600 but all instructions are per hectare for a boom spray & say I need a wetting agent. Thoughts on how I should mix & apply to a 7mx3m lawn? (The guy at the outlet had no idea!)


Type of Plant (if known): 


Symptoms of Plant Illness (please try NOT to diagnose your problems yourself): 
Weeds – want to kill oxalis in santa anna couch lawn


Soil Type (e.g. sandy, clay or loam) OR Potting Mix Type: 
Not sure – turf was laid by a professional golf course greenkeeper about 15 years ago so I know it was done properly!


How often do you water the plant:
Lawn – so not in winter, couple of longer soaks per week in hot summer


How many hours of sunlight does the plant get each day:
unsure – some areas its in all day sun, but it’s worse in the part shade areas of the lawn


What type of plant is it:
weed – oxalis


How long since you planted it:
not planted


Have you fertilised? If so, with what and when:
Not since I have been trying to get rid of the weed


Is the plant indoors or outdoors: 


Is the plant in a pot or in the ground: 


What other treatments have you given the plant: 
I tried ‘David Gray’s Winter grass killer’ recommended by Munn’s, ‘Brunnings Weed Kill for Lawns” and Akers of Lawn (Professional Garden maintance) for 12 months-the whole reason I got them was to scarrify and top dress..since then the problem has developed and blossomed! Wonder if it was carried in on their equipment? After some reasearch, learnt what I was using was useless against it and everywhere suggested metsulfuron methyl. Yates couldn’t suggest any product they had that would kill oxalis, just suggested using ‘Buffalo Pro’

Upload photo if available: 

Other Comments: 
Thank you for your help
Sorry had trouble with photo. It is not the actual soursob variety, rather a small creeper type with purple/pink flowers, and a smaller variety that looks like clover but the Akers of Lawn owner said that is also a variety of it (He’s been in the industry for over 40 years so I guess he knows!) I do know they’re all the same family at least!


Answer: “LW”  You need to go back to the supplier. None of this is what i would recommend. All the advice that you have embraced is BS to me and environmentally nasty. i don’t blame you for not even mentioning your name.  Don