First off that article says nothing about MS increased rates anywhere. But also, it talks about something that happened from July 9, 1953 to Aug 1, 1953. It’s one instance of testing a chemical for the cold war that was for trying to determine how Nuclear Fallout would spread in the area. Also, worst of all, you said there was an increased rate of MS in Saskatchewan but then posted an article that talks about something that happened in Winnipeg, which last I checked, was in Manitoba not Saskatchewan.
Edit: It does list an event that happened in Alberta but those were just claiming they could see some “distanctly visible emissions” but no study has shown any evidence for that being an actual chemical being ejected from the planes. There is also a supposed instance of it in St. Lois where they use just two people as evidence for it. It also talks about other tests the cia and other government agencies have done on the populace but none of those listed were a chemical dispersal except the original.