Research and experience shows applying it now is NOT EFFECTIVE. But even if I ignored that and tried:
Systematic means absorbed by the plant, incorporated into the plant. Forever.
Its CALLED SYSTEMATIC for a reason. I wish people would stop ignoring the fact it does NOT just disappear.
Besides research has shown the nemitode is much more effective (100% in field trials see summary online:
http://www.cdn-iris.ca/borer.h... ) so if I WAS going to try something this late in the game I would go with the one with less negative side effects and much less persistence. Why would I settle for something so toxic, so wide rangingly negative AND not nearly as effective.