The dive team, left, and kayak team start their search for invasive plants Tuesday at the south end of Cobbossee Lake in Manchester. (Joe Phelan/Staff Photographer)WINTHROP — Cobbossee Lake is the ideal picture of summertime lake life in Maine — lake houses dot the waterfront, pontoon boats coast around with families on board and loon calls echo from shore to shore. AdvertisementIn central Maine, Cobbossee Lake connects Litchfield, Manchester, Monmouth, West Gardiner and Winthrop and is home to several longstanding summer camps. Cobbossee Lake received herbicide treatments last year, but staff and volunteers still found several infestations this summer when they resumed surveying. FOR THE LOVE OF THE LAKEThe Cobbossee Lake Association, formerly Cobbosseecontee Yacht Club, reorganized into a nonprofit in 2019 to focus on education, fundraising and membership programs to fight against invasive plants.