Lilac mildew?

Asked August 5, 2016, 12:02 PM EDT

My lilac bush has a green buildup on all the branches with very little leaf foliage. The few leaves appear to be healthy. The bush is over 20 years old. Is my problem mildew and what can I use to treat my bush?

McHenry County Illinois

1 Response

Please submit photos of the shrub for more accurate diagnosis of the problems your shrub is having.