4. Often Leads to Death of White Pines Two White Pines Removed due to Blister Rust Infection

9. More White Pine

12. More Ribes

13. More Ribes

14. Life Cycle of White Pine Blister Rust

15. White Pine Blister Rust Life Cycle II

23. Slightly Yellowing Needles in the Spring

24. Canker Associated with Yellowing Needles

25. Canker Associated with Yellowing Needles

27. Branch Flagging

28. Branch Flagging and Associated Canker

29. Small Tree Infected with Blister Rust Margin of the canker is orange

30. Trunk Cankers

33. Trunk Cankers and Resin Flow

34. Sunken Trunk from Old Infection

35. Trunk Cankers Greatly Affect the Strength of the Tree

36. Extensive Decay & Strength Loss Small amount of Sound Wood Outline of Healthy Tree

38. Tree Failure due to Trunk Canker

39. Resin Flow Associated with Canker

40. Branch Canker from Fallen Tree

46. Un-Thinned VS. Thinned Pines

47. More un-thinned Pines

48. Thinned Pines, increased air flow

49. Poor Air Flow

50. Increased Air Flow around a single Tree

53. Bark Tracing