I put down systemics very early this season and found that I have had fewer borers. Most are near bushes or evergreen trees. The moths tend to hide in those and they are not very high flyers. I only treated twice but very early in the season. They say the hatching starts after two consecutive days of 70 degree weather. If you get them while they are very small, they are goners but spraying after they are inside the leaves does not do much.
