Poplar tree leaves (Columnar variety)
Is there an acid component in the leaves of this type of poplar tree? The reason for the question: a cut limb from the tree (in leaf) was left, for a number of days, on a small area of our lawn. We noticed that the grass was damaged - patchy, didn't grow afterwards, It's taken quite a few seasons to regain the lawn to health (over seeding etc.) We live in Lethbridge AB Canada
Outside United States trees and shrubs
Thank you for your question. Although I could find no study identifying a specific alleleochemical in poplar limiting growth of turf grass, a recent paper did link poplars with a suppression of growth in rice seedlings: https://pdfs.semanticscholar.org/b513/1e2590617aa530a4d7f0a4dc78322d7c9db6.pdf Since both rice and turf are grasses, it wouldn’t be much of a stretch to predict the growth retardation you are observing. But, again, I can find no specific research linking them. Hope this is helpful.