The listing of 13 herbs as hazardous substances and delisting of sulphur as a safe import has run into a further hurdle after the Administrative Court found the announcement to be unlawful. The court on Wednesday issued an injunction suspending the announcement on the listing of the herbs and delisting of sulphur from taking effect. The announcement, signed by Charnchai Chairungruang, the industry minister, took effect on Feb 3. The announcement covers the listing by the hazardous substances committee of natural pesticides made from 13 herbs as hazardous substances type 1. This means producers of locally-made natural pesticides must inform the Agriculture Ministry of their use.