LIHUE, Hawaii (AP) - Three biotechnology companies are suing to block Kauai County from implementing a law that would require large farms to disclose the use of pesticides and genetically modified organism.

The Honolulu Star-Advertiser reports (http://bit.ly/1fnpHFl ) Syngenta, Pioneer Hi-Bred and Agrigenetics filed the lawsuit in U.S. District Court on Friday.

The suit argues that the law irrationally prohibits the companies from growing any crop in arbitrarily drawn buffer zones, and restricts the companies' pesticide use within the buffer zones.

The suit also contends that the disclosure requirements would expose the companies to risks of "corporate espionage, vandalism and environmental terrorism."

Proponents of the new law said the lawsuit has no merit.