A. from Lakewood Ranch, Florida writes
I purchases Doninion 2L to treat some ash trees. I want to apply the product directly to the tree to avoid runoff. I have heard of people simply drilling holes in the root flair around the circumference of the tree, and filling them with the undiluted pesticide. Is this an acceptable method? What rate of Doninion 2L is recommended for the ash boring beetle? Your website says
We recommend a root drench using the higher rate of 0.2 oz of Dominion 2L per inch of trunk diameter at breast height to treat insects like ash borers. We do not recommend drilling into trees or roots unless you are already an experienced arborist who has performed this type of treatment successfully before. Drilling will stress the trees, and if they already have ash borers, the trees are likely already under quite a lot of stress. An alternative treatment would be doing a bark band application of a dinotefuran product, such as Safari 20SG. Safari translocates very quickly through plants.
Answer last updated on: 04/09/2018
