Question
I have 3 dwarf forsythia bushes.  The leaves on the ends of the twigs have begun to curl up, turn yellow and then brown.  This started a couple of weeks ago from the bottom of the plants and has moved up to the top leaves.  I originally sprayed insecticide, with no result.  Could it be a fungus?  Thank you.

Answer
J.
These plants are pretty hardy.  Unless the leaves are spotted, I would lean toward a potential moisture stress (too much or not enough).  Be sure it gets a nice drink, especially if it has been hot/dry where you are. Also examine the base of the plant for any apparant damage that may have removed the bark.

Steve