For spot spraying weeds and moss, a knapsack sprayer is best. These usually hold about 15 litres. It is worth buying a good quality professional sprayer which will give years of service and are comfortable to use. I recommend the Smith Performance Field King Pro which I can supply in my online shop.
For spraying full size croquet lawns a higher capacity sprayer is essential - see below.
Sprayers are used for applying liquid fertiliser, growth regulator, wetting agent, moss killer, weed killers and pesticides. The normal dilution rate means that 45 to 50 litres is applied per lawn.
The sprayer is fitted with a North Start 8.3 lpm pump, has a tank capacity of 98 litres and a single broadcast nozzle with a spray width of 4.5 metres. There are two versions, towable or pedestrian. It takes less than 10 minutes to spray a full size croquet lawn using either version. In both cases the operator is travelling away from the spray drift when spraying.
Towable £475 or £505 in my online shop.
This sprayer has a cable which connects to the tractor battery with a conveniently placed on/off switch next to the driver. The underframe is galvanised steel and the wheels are solid and puncture proof. There is a clevis hitch and the tow bar doubles as a stand for storage storage. It measures 90cm wide, 87 cm high. The tank is 33 cm deep, overall depth in parked mode 72cm (as shown below).
Pedestrian £475 or £505 in my online shop
The pedestrian version has a galvanised underframe which bolts onto to a garden cart (cart not supplied). If you don't already have a cart, they are available online at around £53. The pedestrian version is supplied with a 12 volt battery and charger to drive the pump. An upgrade kit is available to convert a pedestrian sprayer to towable at a later date.
Spray bouts and calibration - click below for more information