ENTM 307E:� Worksheet 10. Borers, and Borers as Disease Vectors.� ������� �����������

 

 

Draw a bronze birch borer adult.� Look at it under a microscope and explain why this group of adult beetles are called metallic wood boring beetles.� Diagram the shape of its larva.� Why is it called a flatheaded borer?

 

 

 

 

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Diagram the pattern of injury:� Be sure to diagram the shape of the exit hole and ridges in the bark.� Can you feel these ridges on infested samples???� When should this pest be controlled?

 

 

 

As you examine photos of the flat headed apple tree borer, note the characteristics that make it a metallic wood boring beetle.

 

 

 

Draw the specimen of the locust borer.���� What characteristics make it a longhorned beetle?� Examine the display of the beetle injury in the case.�� Where does it feed and what is the shape of the exit hole?�� Why are larvae called round headed borers?

 

 

 

 

 

 

 

 

What is the Asian Longhorned beetle, and how can it be identified?

 

 

 

Where is it in the US and why is it such a problem?

 

 

 

 

 

Groups of dying pines are common in the Midwest due to periodic drought and the presence of bark beetles and pine sawyer beetles.� Examine specimens of pine sawyer beetles, and bark bark beetles, and their damage so you can be able to recognize them.

 

 

 

Draw a bark beetle, AND a bark beetle gallery.

 

 

 

Where do bark beetles feed?

 

 

 

 

What are blue staining fungi, and how are they transmitted by bark beetles?

 

 

 

 

 

 

How can pruning encourage borer attack?

 

 

 

Describe the procedure for managing landscape planting of pine with a tree half killed with borers.

 

 

 

 

 

 

What are the vectors associated with Dutch Elm Disease? Why has insecticide been an ineffective tool in the control of this pest?

 

 

 

 

 

 

What is the pathogen and vectors involved with Oak Wilt, a serious pest of red oak?�

 

 

Examine trunk specimens around the room and draw a composite diagram of a log to illustrate the following types of holes:

 

bark beetle

metallic wood boring beetle

round headed borer

sapsucker

 

 

 

 

 

Self-Study Guide

 

How are the following related to the control of borers?

 

Water stress

Sanitation

 

What are sex pheromones and how are they used to control borers?

 

How can borers vector insect diseases?

 

Name the vectors hosts, and pathogens involved in

Oak wilt

Pine wilt

Dutch Elm Disease

 

 

Review Relation between bark beetles and blue staining fungi.

 

Differentiate

bark beetle

longhorned beetle

metallic wood boring beetle

clearwing borer

flat headed borer larva

round headed borer larva