adverse environmental conditions that reduce a plant 39 s health the film dries quickly without sintering or in situ curing the film resists uv radiation mildew and water 0075 fig1 is a chart showing the results of a powdery mildew test the mildew rating is plotted versus time for four different samples the mildew rating was quantified according to the following procedure 0 no sign of leaf infection 1 1 25 of leaves are infected 2 26 50 of leaves are infected 3 51 75 of leaves are infected and 4 76 100 of leaves are infected the first sample was a control having no coating the second sample was an application of the sol gel dissolved to a concentration of 1 100 the third sample was an application of the sol gel dissolved to a concentration of 1 50 the fourth sample was weather stick u00ae at a concentration of 1 250 the samples were applied to erysiphe chichoracearum the plants were observed weekly the plants without a coating became diseased more quickly and more completely than the coated plants the plants that were coated with a 1 100 solution of sol gel were less diseased in addition the disease took longer to infect than uncoated plants.