Herbicide companies:
It has been frustrating so far. Google/Ask searches for any of the herbicides mentioned are not producing much. Finding companies that specialize in herbicides, especially wheat and barley, is even harder.
There are the general large herbicide companies (MON, SYT, SMG, CEM, etc. - MON being the best of them), but they are diversified among many services and products.
The majority of production (and plenty of small companies) is in India and China - and on their markets.
Companies like AgrEvo and Bayer CropScience (BAYG.F BAY.GR) look good but are also on overseas markets.
If anyone has ideas for the US/Canada market, love to hear them, otherwise fertilizer still looks good.