Entomologists at UMass Amherst report that some of this season’s first gypsy moth egg masses have begun to hatch, as observed on April 26 in Belchertown at a location off Route 202. Extension entomologist Tawny Simisky reports that a single egg mass can hold as many as 1,000 eggs. Gypsy moth is a non-native invasive insect in North America. (TV22, 4/28/17; WBZ4TV; WHDH-TV 7; San Francisco Chronicle; CBSBoston; Recorder; Telegram & Gazette; Boston.com; Western Mass. News)