What are you spraying for? If it's just the powdery mildew common on lilac leaves in the fall, don't bother... doesn't really bother the plants, especially when the damage isn't apparent till late in the summer. Prune for increased air circulation.
Most fungicides are fairly nasty. Bordeaux mixture and sulfur are about the most benign of the bunch, and will control powdery mildew.
If you've got Ascochyta, pruning and sanitation will go a long way towards controlling it.Is it too early to spray Daconil on lilacs? Leaf buds and bloom buds are appearing. Spray schedule?
no need to spray. fertilize with a bit of bone meal and water.
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