Tests of different versions of an organic, food-grade, hydrophobic coating (called HydroShield) show that they can keep western cherry fruit flies from infesting sweet cherry orchards in the Pacific Northwest, where the value of the cherry crop tops $1 billion annually. The coating makes the cherries a bit firmer, which consumers tend to prefer, while thwarting female fruit flies from laying their eggs inside the fruit (as seen in these test results). These three lab tests show significant reductions in fruit fly eggs with HydroShield application. (Figure originally published in Yee and Kaiser 2022, Environmental Entomology)