The present invention relates to the application of plant protection agents, fertilisers and/or pesticides by means of a (preferably portable) sprayer or a small appliance (such as, for example, a bicycle tyre sealant injector). The present invention relates to a monitoring module with which existing sprayers can be equipped in order to control, track and/or document the spraying process. The present invention further relates to a method, a system and a computer program product for monitoring spraying processes.

An irrigation attachment system for automated or autonomous delivery of lawn-treatment solutions through an existing sprinkler network is disclosed. The system includes an in-ground housing containing a refillable reservoir of concentrated pesticide or fertilizer, a mixing unit coupled downstream of a water supply line, and an electronic control unit programmed with a watering schedule and treatment concentration ratio. During operation, the mixing unit selectively withdraws treatment solution from the reservoir and outputs a treated water and solution mixture through sprinkler heads. The control unit includes memory for storing operational instructions, a processor to regulate dosing events in accordance with user-defined parameters, and a wireless communication module to interface with a mobile device. A day-of-week scheduling interface enables remote configuration of flow percentages and treatment add-in ratios. The system enables unattended irrigation and chemical dosing in a discreet, durable enclosure that integrates with conventional lawn-irrigation systems.

A nozzle assembly for an agricultural sprayer comprising: a nozzle body having an inlet and an outlet; a pulse width modulation (PWM) nozzle valve disposed within the nozzle body and configured to modulate flow from the inlet; a spray tip mounted at the outlet downstream of the PWM nozzle valve; and a pressure sensor integrated within the nozzle body and positioned hydraulically between the PWM nozzle valve and the spray tip, the pressure sensor configured to measure pressure of liquid exiting the PWM nozzle valve, wherein the nozzle assembly is configured to communicate the measured pressure to a sprayer control system for closed-loop control of nozzle-exit pressure and droplet size.