Thank you Ms. Wente for an article that incorporates some scientific realities and does not target the pop culture only that is only interested in a quick fix to a real problem so long as it doesn't touch their life. As an Ag producer I have seen the decline of the Monarchs as well and miss the late summer migration that turns trees in our woodlot to Monarch coated monuments, the sight is spectacular, but becoming rare. We are always conscious of our impact on the environment, but would offer that the  use of glyphosate will ensure the future of the Monarchs. As you mentioned in the article, milk weed fell under the Noxious Weeds Act of Ont and we were obliged to eradicate from our property. Because the weed spreads by wind (similar to dandelions) life was much easier for us if we used a scorched earth strategy to eliminate milk weed everywhere on our property and not just cropping areas. With Roundup and a little cooperation from the Ont gov. we can let milk weed grow and feed the Mon