Product technology specialist Dr Mike Drinkall said: "When turf is stressed and warm, moist weather sets in then it is the weeds that thrive to the detriment of the turf.
"If this looks to be happening to your turf this autumn then you will need to get in and knock the weeds back before they take over.
"In these situations GREENOR is an ideal choice of product where turf weeds such as daisies, dandelion and clover are a particular problem and also where you have yarrow and plantains which are often more difficult to control because of their waxy leaves."
The product contains three active ingredients – fluroxypyr, clopyralid and MCPA – which are absorbed into the plant and translocated to the root system for a thorough kill.
It is available in 5 litres packs from Rigby Taylor and should be applied when weeds are actively growing at an application rate of 4 litres per hectare in 200-500 litres of water per hectare.