Résumé :
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A phase doppler particle analyzer (PDPA) was used to obtain information needed to characterize water splashed from various surfaces with the aim of expanding our knowledge of the spore dispersal process. Simulated rain was generated with flat-fan nozzle which produced a cumulative volume distribution similar to that of natural rains with 45 mm/h intensity. Thirteen different surfaces exhibited large differences in size distribution and total mass of splashed droplets produced. Surfaces were: bare soil, straw, plastic, sand, deep water, loosely stacked strawberry leaflets, leaflets placed horizontal on soil, healthy and rotten (diseased) strawberry fruits, and four combinations of height and planting density of a sudangrass cover crop. In general, sand, straw, leaflet, and fruit surfaces had low splash responses, while the water surface and the plastic cover had the highest responses. From 0.8% (sand) to 41.5% (plastic) of the incident rain mass was splashed >1 cm above the surfaces. For all surface treatments, droplet size distribution was positively skewed, with many more small droplets (
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