Leeper, John R.2016-03-212018-09-062016-03-212018-09-061980retrieved from: http://nysipm.cornell.edu/factsheets/treefruit/pests/walh/walh.pdfhttps://hdl.handle.net/1813/43135NYS IPM Type: Fruits IPM Fact SheetThe white apple leafhopper (WALH) is native to and widely distributed throughout the apple growing regions of North America. The WALH has 2 generations a year and overwinters in the egg stage.en-USAgricultural IPMFruitsTree FruitApplesfact sheet