Abstract
The environmental and socioeconomic constraints force the agricultural sector to find alternative plant protection solutions. As a result, several alternative plant protection products (PPP) have been developed in the last decades. Ozonated water sprayed on the vegetation proved to be a partial alternative to agricultural chemical PPP for plant diseases. The ozonated water efficacy is related to the production of reactive oxygen species (ROS). At the same time, ozonated water showed no significant phytotoxicity when the spraying was carried out under well-ventilated conditions. In the present study, a corona discharge ozonating water tool was installed on a commercial mist-blower axial sprayer then the redox potential was measured to assess the sanitizing effects on plants due to ROS concentration. First, the redox potential (ORP) was measured inside the tank, after the pump, at the nozzle level, and on a test bench that simulated the vertical wall of the plant. Next, the redox growth rate was measured at each point to assess the system’s latency. Then, different nozzle types were used to measure the effect of varying droplet sizes on redox potential. The result shows potential redox decreases by 7%, 12%, and 29% after the pump, at the nozzle, and at the test bench, respectively. These losses are affected by the droplet size, and they increase in the case of a smaller droplet. Significant differences were found among different nozzle types.
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Sozzi, M., Zanchin, A., Gasparini, F., Marinello, F., Sartori, L. (2023). Preliminary Trials to Investigate the Effect of Sprayer Setting for Ozonated Water Spray Applications to Improve Plants Disease Control Efficacy. In: Ferro, V., Giordano, G., Orlando, S., Vallone, M., Cascone, G., Porto, S.M.C. (eds) AIIA 2022: Biosystems Engineering Towards the Green Deal. AIIA 2022. Lecture Notes in Civil Engineering, vol 337. Springer, Cham. https://doi.org/10.1007/978-3-031-30329-6_73
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