LITTLE ROCK — The Arkansas State Plant Board on Friday approved an emergency rule banning the use of the herbicide dicamba after receiving hundreds of complaints from farmers who say its misuse has damaged their crops.

The 120-day emergency rule includes an exception for pastureland, according to the board’s website.

The emergency rule will go next to Gov. Asa Hutchinson for approval. If he signs off on the rule, it will go to the Executive Subcommittee of the Arkansas Legislative Council for consideration.

The board also decided Friday to expedite a rule increasing civil penalties for dicamba misuse.

Hutchinson announced June 14 he had told the directors Department of Agriculture and the Plant Board, which is part of the department, to investigate a large number of complaints about dicamba.

By Friday the Plant Board had received 242 complaints about alleged misuse of the herbicide.

A group of farmers also filed a class-action lawsuit in federal court this month against the makers of dicamba.