Protect Manitoba's Trees. Watch out for Cottony ash psyllid.

How to Detect CAPs

Due to their small size, their presence is usually noticed only when trees start showing stress. You'll see:

  • thinning in the upper portion of the tree
  • browning, yellowing and curling along the edge of leaves indicating a first generation psyllid population
  • curled and misshapen leaves
  • a cottony substance found within the curled leaves indicating a second generation psyllid population
  • heavily damaged leaves can have a cauliflower appearance
  • leaves may drop prematurely

Over time, their presence will weaken the ash trees, making them vulnerable to other illnesses and predisposing them to a premature death.