Modern apple tree plantings have been made at the Hudson Valley Lab. PHOTO BY RICHARD LEHNERT Workers at Cornell University’s Hudson Valley Laboratory at Highland, near Poughkeepsie, New York, tend to see themselves as guardians of the gate. Whenever new diseases and insects come to challenge fruit growers in New York State, they come from the south and sweep up through the valley. While fruit growers in northern New York have yet to face brown marmorated stinkbug and spotted wing drosophila, the scientists at the ­Hudson Valley Lab have been dealing with them for more than two years. They hope […]