The southern pine beetle that has decimated thousands of trees around Long Island has hit East Hampton Town for the first time, forcing officials to plan to cut down 800 infested trees. …Town officials said they are applying for a New York State Department of Environmental Conservation grant to cover the estimated $80,000 cost of killing beetles by cutting down trees to expose the pests to the cold. …Town Councilman Peter Van Scoyoc said the infestation has already increased within the past two weeks, making him concerned “we’re going to lose most, if not all, of the trees eventually” in areas of Northwest Woods. “It’s probably unstoppable, but we’re going to make an effort as best we can,” he said.