Experimental work is being done on several farms. The substance most generally used is sodium chlorate. It is used not only in Canada but in other countries, and there is a great demand for it. As a matter of fact, there is a considerable shortage. It has been found the different chemicals are used most successfully on plants with fleshy leaves.. On other plants it does not operate so successfully. The cost of operation is sufficiently high to make it most difficult to apply it in an extensive way in farm operations. Probably it can be used to good advantage on lawns, gardens and other limited areas, but it is too expensive to apply on large areas.
Subtopic: DEPARTMENT OF AGRICULTURE