Autonomous modular system mounted on a conventional (CON) sprayer operating on the principle of pulse-width modulation (PWM) control of electromagnetic valves represents state-of-the-art technology for implementation controlled application of spray mixture without changing the operating parameters of the sprayer (e.g. spray pressure, nozzle size). In accordance with the principles of precision viticulture, the pulse width modulation control is the primary technology, which allows the application of the required amount of spray mixture exclusively to the target areas of the vine without changing the droplet size spectrum and allows for even deposit quality and reducing the drift outside the target areas. In the vineyard, we tested an autonomous axial sprayer prototype throughout the entire spraying season in 2021 on which we have installed an autonomous modular system with enabled pulse-width control. We tested two modes of operation of the sprayer prototype, namely autonomous (continuous duty cycle control (DC: 0 to 100%)) and conventional (nozzle fully open at all time), at a steady spray speed of 6 kmh-1. We compared the amount of PPP expressed as a percentage between autonomous and conventional mode of operation of the sprayer through individual nozzles on the sprayer. The maximum saving of the spray mixture of 69.8%, through an individual nozzle was measured at phenological stage of the vine BBCH 55. A comparative analysis between the CON and PWM mode of the spray mixture application showed that we saved 626.24 l per year in the automated mode of operation. Autonomni modularni sustav postavljen na konvencionalnu (CON) prskalicu, koji operira na principu kontrole elektromagnetskih ventila modulacijom širine impulsa (PWM), predstavlja najsuvremeniju tehnologiju za provedbu kontrolirane primjene mješavine za prskanje bez promjene operativnih parametara prskalice (npr. pritisak prskanja, veličina mlaznice). U skladu s principima precizne vitikulture, kontrola modulacijom širine impulsa je primarna tehnologija, koja omogućava primjenu potrebne količine mješavine za prskanje isključivo na ciljana područja vinove loze, bez mijenjanja spektra veličine kapi, te omogućava ujednačenu kvalitetu nanosa i smanjenje zanošenja van ciljanih područja. U vinogradu je kroz cijelu sezonu prskanja u 2021. testiran prototip autonomne aksijalne prskalice, na koji je bio instaliran autonomni modularni sustav s omogućenom kontrolom širine impulsa. Testirana su dva načina rada prototipa prskalice, autonomni (kontinuirana kontrola radnog ciklusa (DC: 0 to 100%)) i konvencionalni (mlaznica potpuno otvorena sve vrijeme), pri standardnoj brzini prskanja od 6 kmh-1. Usporedili smo količinu sredstva za zaštitu bilja izraženu kao postotak između autonomnog i konvencionalnog načina rada prskalice kroz individualne mlaznice prskalice. Maksimalna ušteda mješavine za prskanje od 69,8%, kroz individualnu mlaznicu izmjerena je u fenološkoj fazi vinove loze BBCH 55. Komparativna analiza između CON i PWM načina primjene mješavine za prskanje pokazala je da je s automatiziranim načinom rada u godinu dana ušteđeno 626,24 L.