ElectroHydroDynamicAtomization (EHDA) is also called ‘electrospray’. Atomization is the process of breaking up of a liquid in small droplets. An electric field influences the droplet size and at the same time the droplet is charged. The charged droplets will be attracted to the plants.
Three methods of applying plant protection products were compared using a fluorescent tracer on pot plants, small chrysanthemum plants and half open rose buds: EHDA, a conventional nozzle and a knapsack.
Electrospraying gave a more even coverage on the upper side of the leaves with droplets compared to the other methods. On the underside of the leaves no droplets were deposited. The droplet size in the experiments was to big (200 micron).
Research in the past has proven that droplets with a smaller diameter reached the underside of leaves.
Opening the rose buds showed that a larger amount of droplets penetrated in the flowers by using EHDA than by applying the other methods.
Research was sponsored by: Productschap Tuinbouw (PT) en Centre of Expertise Water Technology (CEW).