The chitosan and potassium silicate were applied to the aerial
portion of the strawberry plants with a manual backpack sprayer
(Jacto PJH, JD-12P spray nozzle) gauged to apply a spray volume of
1000 L ha1 from 60 to 95 days after planting. Five weeks after the
initial application of the products, all of the fruits in each plot that
had reached at least 70% ripening were harvested and taken to the
laboratory.