Lirula Needle Blight?

Asked May 22, 2018, 8:48 PM EDT

I believe I have Lirula needle blight on two 20 year old black Hills Spruce. What fungicide will work on them? When and how is it applied?

Ramsey County Minnesota diagnosis of plant problems spruce trees horticulture

3 Responses

The page you referred me to does not give me the name or maker of a fungicide that will work on Lirula macrospora. Do you have that information?
I used that page to diagnose the problem. I am not certain I am right. Did my photos help you at all?

If you will look at that page again, at the bottom, under Management, it states: Apply Chlorothalonil or Bordeaux mixture when new needles are half the length of mature needles and a second time, one month later. Since the disease cycle is 3 years long, fungicide application must occur for 3 consecutive years to be effective