Chilmark will go to the state’s highest court to block a group of riparian owners from using herbicideson Squibnocket Pond.

Six riparian owners want to use herbicides to control phragmites in Squibnocket Pond. The town wants to block them, citing rules that prohibit pesticides around the pond. On advice of counsel, selectmen will ask the Supreme Judicial Court to decide the dispute.

The state Department of Agricultural Resources will allow comment until Feb. 18 on utility's plan to use herbicides to control vegetation under power lines.

Amidst public scrutiny of NStar’s vegetation management practices, senior arborists from the utility company addressed concerns of Tisbury residents at a meeting on Tuesday of the board of health.

The power company resumed an herbicide spraying program last month, reigniting a debate about threats to the environment on the Cape and Vineyard.