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BARK BEETLE BARK BEETLE BARK BEETLE BARK BEETLE

Photo Courtesy of UNIVAR Photo Courtesy of UNIVAR Photo Courtesy of UNIVAR Photo Courtesy of UNIVAR
1.Antenna- short and clubbed 6.Thorax- BARK BEETLE 1.Antenna- short and clubbed 6.Thorax- BARK BEETLE
2.Eyes - 2 7.Petiole- none 2.Eyes - 2 7.Petiole- none
3.Head - small 8.Abdomen- large 6 8 3.Head - small 8.Abdomen- large 6 8
4.Legs- 6 9.Color- dark brown to black 4.Legs- 6 9.Color- dark brown to black
5.Wings- covered by hard elytra 10.Other- small sized beetle 5.Wings- covered by hard elytra 10.Other- small sized beetle

Life Cycle Life Cycle
Once inside a tree, a brood gallery is created where eggs are laid. The Once inside a tree, a brood gallery is created where eggs are laid. The
eggs hatch into larvae, which then expand the gallery deep into the 3 5 eggs hatch into larvae, which then expand the gallery deep into the 3 5
wood where the larvae will overwinter. They eventually turn into pupae wood where the larvae will overwinter. They eventually turn into pupae
and emerge as adults during the second summer or fall. Photo Courtesy of UNIVAR and emerge as adults during the second summer or fall. Photo Courtesy of UNIVAR
BARK BEETLE BARK BEETLE
Actual size 1/4” Actual size 1/4”
About 1/4th inch in size, these destructive beetles carve tunnels through the bark and into the About 1/4th inch in size, these destructive beetles carve tunnels through the bark and into the
soft inner wood of trees. There are actually many different species of Bark Beetles, and some soft inner wood of trees. There are actually many different species of Bark Beetles, and some
are quite specific as to the types of trees that they will infest. are quite specific as to the types of trees that they will infest.

Bark beetle tunnels can also harbor fungus, hastening the death of the tree. They especially Bark beetle tunnels can also harbor fungus, hastening the death of the tree. They especially
go after sick or weakened trees, becoming a real problem in drought years, but can also attack go after sick or weakened trees, becoming a real problem in drought years, but can also attack
relatively healthy trees as well. relatively healthy trees as well.

1.Antenna- short 6.Thorax- SHOT HOLE BORER 1.Antenna- short 6.Thorax- SHOT HOLE BORER
2.Eyes- 2 7.Petiole- none 2.Eyes- 2 7.Petiole- none
3.Head 8.Abdomen- large 3 6 3.Head 8.Abdomen- large 3 6
4.Legs- 6 9.Color- black 8 4.Legs- 6 9.Color- black 8
5.Wings- covered by hard elytra 10.Other-small sized beetle 5.Wings- covered by hard elytra 10.Other-small sized beetle
Life Cycle Life Cycle
Females bore into new host trees in the Spring, creating galleries for her Females bore into new host trees in the Spring, creating galleries for her
eggs. After 10-15 days, around 40 eggs are laid in one of the galleries. eggs. After 10-15 days, around 40 eggs are laid in one of the galleries.
Larvae hatch out after a few days, and develop over the next 4-6 weeks Larvae hatch out after a few days, and develop over the next 4-6 weeks
before going into the pupa stage. After about two weeks, metamorphosis before going into the pupa stage. After about two weeks, metamorphosis
is complete, and the new adults drill more galleries, overwintering in them. is complete, and the new adults drill more galleries, overwintering in them.
Photo Courtesy of UNIVAR Photo Courtesy of UNIVAR
SHOT HOLE BORER Actual size 1/10” SHOT HOLE BORER Actual size 1/10”

This tiny beetle attacks fruit trees as well as forests. Adults are dark brown to black in color, and This tiny beetle attacks fruit trees as well as forests. Adults are dark brown to black in color, and
only about 1/10th inch in size. They usually attack healthy trees, creating galleries that cause a only about 1/10th inch in size. They usually attack healthy trees, creating galleries that cause a
rapid decline in the tree’s health. Well watered trees can fill up the galleries with sap, which can rapid decline in the tree’s health. Well watered trees can fill up the galleries with sap, which can
help overcome the borers. Young trees that are infected will usually not survive. help overcome the borers. Young trees that are infected will usually not survive.

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