• THE RAISED BARK AND D-SHAPED EXIT HOLES ARE INDICATORS OF THE BRONZE BIRCH BORER, A Tree killer

  • THE THIN CROWN AND YELLOW NEEDLES ON THIS HEMLOCK ARE A SIGN OF HEMLOCK WOOLY ADELGID And/OR ELONGATE HEMLOCK SCALE

  • THE WHITE COTTON BALLS ON THEse Hemlock NEEDLES ARE THE EGGS OF THE HEMLOCK WOOLY ADELGID

  • Caterpillar damage on these oak leaves create a swiss cheese effect

  • The winter moth caterpillar is one of many types of caterpillars that feed on deciduous trees.

  • ApPLE SCAB IS A COMMON FUNGUS on apple and crabapple. THIS TREE LOST ALL IT’S FOLIAGE BY JULY

  • THE NEW BUDS AND NEEDLES ON THIS AUSTRIAN PINE TREE HAVE BEEN DECIMATED BY A FUNGUS.

  • one spongy moth (formerly Gypsy moth) lays 600 – 800 eggs

  • TREES WITH FUNGAL GROWTH AT THEIR BASE should be investigated ASAP

  • THIS GANODERMA APPALANTUM OR "ARTIST CONCH" IS AN INDICATOR of internal decay

  • The cerrena unicolor fungi is an aggressive sap rot that can decay even large stems to the point of breakage.

  • PHYTOPTHORA CANKER IS A SERIOUS DISEASE THAT SHOULD BE MONITORED CLOSELY

  • The leathery, disgiured leaves on this copper beech are a sure sign of beech leaf disease, a deadly pathogen

12345678910111213

Disease and Insect Disorders

Many disease and insect disorders are host specific. Proper diagnosis and an understanding of the pests’or pathogens’ life cycle are critical to prescribing treatment.