U.N. officials say nations have agreed to disclose more trade information about the risks of using three pesticides.

Officials with the Geneva-based treaty known as the 2004 Rotterdam Convention announced Tuesday that 141 nations agreed by consensus to add the three pesticides — alachlor, aldicarb and endosulfan — to a list of 40 chemicals it considers hazardous.

The pesticides are used on a variety of crops.

The treaty aims to improve the information that is exchanged during international trade in chemicals that have been banned or restricted, so that importers and consumers can be better informed.

Officials said a proposal to add a fourth chemical, chrysotile asbestos, to the list was defeated because of opposition from Canada, Ukraine and several other nations in the treaty.