Wayland Town Crier 4/4/09: Natick commission nears decision on herbicide proposal. Members of the Conservation Commission have yet to make a ruling on a plan to use herbicides in Lake Cochituate, but whichever way they go their decision will likely be appealed. The commission on Thursday closed its public hearing on the state Department of Conservation and Recreation’s plan to use diquat several times over the next five years to control Eurasian milfoil near the beach and boat ramp.