Last week (issue no. 4, 2007), I discussed a condition we have observed on oaks in the white oak group and on hackberry. We call this condition “tatters” and describe it as a condition in which most of the leaf tissue is gone, leaving only leaf veins and a bit of leaf tissue around the veins. An image of tatters on hackberry follows.
I mentioned some work done by researchers Jayesh Samtani, Dr. John Masiunas, and Dr. Jim Appleby. A link was provided to a journal article reporting their first-year findings.
I learned that this original work was repeated. These researchers have done two other studies on white and red oak that are complete. Their study on hackberry is ongoing. The following links will take you to a few abstracts published after that original paper. There have been no additional full-length publications to date.
Samtani, J.B, J.E. Appleby, and J.B. Masiunas. 2006. “Simulated Drift Injury to Oaks and Hackberry.” North Central Weed Science Society Proceedings 61:129.http://www.weeds.iastate.edu/ncwss2006/horticulture.html
Samtani, J.B., J.B. Masiunas, and J.E. Appleby. 2006. “Herbicide Drift Study on White Oak Seedlings.” HortScience 41:1005. http://ashs.org/resources/horttalks/detail.lasso?id=59
Another abstract was presented at the HortScience conference. The citation for it follows:
Samtani, J.B., J.B. Masiunas, and J.E. Appleby. 2006. “Leaf Abnormality on White and Red Oak Linked to Drift of Chloroacetanilide Herbicides.” HortScience 41:1038
Some of our readers may want to pursue this additional information. I cannot state with certainty that the injury on oaks and hackberry is from the same cause, but symptoms are similar.