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Additional functionalities of the OPTIMA sprayer for carrots are studied in the project. A variable air support mounted on the boom sprayer is specifically designed using an electrical driven fan able to adapt the airflow in order to increase spray deposition and penetration inside the canopy, but also to reduce spray drift. Preliminary investigation with a 2 m wide prototype boom including four nozzles was tested showing contrasted results depending on the spray configuration at early and late development stages of carrots. Field tests will be conducted in 2021 to cross compare the reference situation using FF110 04 nozzles – 12 km h-1 – 158 L ha -1 without any smart devices with the smart sprayer including the optimized set of low drift nozzles and the air support. Deposition and spray drift will be tested according to ISO 25522 and ISO 22866 protocols respectively. PWM nozzle control is implemented on the sprayer in order to allow variable rate applications (VRA) according to a prescription map based on the EDS and DSS. This VRA functionality will be operated in the fields with either synthetic fungicides or BioPPP selected for their efficacy against Alternaria in laboratory conditions. Results of these field investigations will be presented.
|Title of host publication||Aspects of Applied Biology : International Advances in Pesticide Application|
|Publisher||Association of Applied Biologists|
|Publication status||Published - 2022|
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