WSU Extension


Leaf gall 
Leaf spot 
Aphid (Manzanita leafgall aphid) 

print version| pdf version| email url    
Caption: Kinnikinnick leaf spot
Photo by: R.S. Byther
Kinnikinnick : Leaf spot
(revision date: 4/23/2014)

Leaf spot is a fungal disease. Symptoms include development of brown, necrotic spots on leaves. The fungus most likely overwinters on infected leaves and possibly on twigs. The disease is favored by cool, wet conditions and is spread by splashing water.
Management Options

Non-Chemical Management
  • Rake and destroy fallen leaves.
  • Remove and destroy infected leaves from plants, where practical.
  • Avoid overhead irrigation.
  • Space plantings and prune to improve air circulation. Avoid planting in moist, shady areas if leaf spot is a problem.
  • The variety 'Massachusetts' is reported to be resistant to leaf spot.
Select non-chemical management options as your first choice!

Chemical Management

None recommended


+ Show larger images

Caption: Kinnikinnick leaf spot
Photo by: R.S. Byther