The grassroots campaign against the use of herbicides in a Tomales Bay State Park forest health and wildfire-mitigation plan is gaining force as Assemblyman Damon Connolly, Supervisor Dennis Rodoni, the Inverness Association, and the Environmental Action Committee of West Marin join the chorus of opposition.

Meanwhile, the Tomales Bay Foundation, whose leaders expressed support for the plan last month, is evaluating public outcry over its position, and the number of signatures on an online petition…