#$%^&*AU2014201013A120141009.pdf#####P1095AUAU ABSTRACT A sprayer unit 5 for spraying agent on to plants. The unit includes a chamber and an air supplier 13 is arranged to supply at least air to the chamber. One or more outlets, from the chamber, are configured to direct the air toward the plants. An agent supplier 5 is arranged to supply the agent such that the agent is conveyed to the plants by the directed at least air. The chamber is at least partly defined by a module and another module. Each of the module and the other module includes a respective mating portion by which the module and the other module are mutually mated. At least one of the module and the other module is interchangeable with yet another module having 10 an equivalent mating portion, to vary a spray pattern1/5 LO C O) co~ col
