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Martha from Phillips, Wi writes

Brush Killer & Stump Killer. I recently bought this to kill lilacs.

I have a multi step problem. I have OLD lilacs with tough and horrendous roots. In amongst them is a big yellow jacket nest. This winter (still lots of snow here), I cut down all the lilacs. There are hundreds of tiny stumps now. I want to kill the lilacs and look for entry points for the yellow jackets. I can rake the duff, once the snow melts to see better. From reading the label, it suggests I use it full strength. Can I thin it and spray every couple days, and if so, how many days in-between? I couldn't possibly use a paint brush, there are just too many of them.

Answer:

The answer to your question is somewhat complex. First, it is important to know that in order to kill the stump and roots you must apply this to actively growing plants or you must cut the stump again and quickly (within a minute or so after cutting) and spray the freshly cut stump in order for the plant to absorb the herbicide. This is important because if the plant is dormant it will not absorb the herbicide which would be pointless.  A foliar spray to a stump would not deliver desirable results. Also, you most certainly can use a sprayer to apply the Fertilome Brush Killer & Stump Killer. I would recommend using it full strength as anything subpar may not give you desirable results. 

Answer last updated on: 03/31/2014

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