Of course, much of the problem stems from administrative red tape and the lack of reciprocity in standards. Those are two important parts of the answer to your question. PMRA's requirements are very different from those in U.S. regulations.
In the spring, for example, the PMRA asked us to consider adding environmental options for new registrations. In the United States, there is no need to do all this; in Canada, we want to add it.
The red tape surrounding the registration of crop protection products is certainly a major obstacle.