(Undated)--State environmental management and public health officials are announcing aerial spraying to deal with mosquitoes carrying dangerous diseases.The larvicide application today will be at Chapman Swamp in Westerly, the South Branch part of the Pawtuxet River in West Warwick, and the Valley Marsh area around Lincoln, Cumberland and Central Falls.Triple-E and West Nile virus have been detected in mosquitoes in Rhode Island this year and there has been one human case of triple-E.