PSHB cannot breed in every tree it attacks: reproductive host trees let the beetle multiply, while non-reproductive hosts are attacked but are generally not expected to die.
PSHB is not able to complete its life cycle on all the tree species it attacks. Trees in which the beetle can breed and multiply are referred to as reproductive host trees. Important reproductive hosts include species of oaks, maples, willows and coral trees, avocado, and castor bean.
Non-reproductive host trees are attacked by the beetle, but the beetles do not establish galleries (tunnels) or breed. The fungus may or may not cause disease. Trees are generally not expected to die.
The original page refers to Addendum A (Reproductive Trees) and Addendum B (Non-Reproductive Trees); those addenda were not available during this migration.
Frequently asked questions
What is a reproductive host tree?
A tree in which the beetle can breed and multiply. Important examples named in the source are oaks, maples, willows, coral trees, avocado and castor bean.
What is a non-reproductive host tree?
A tree that is attacked by the beetle, but where the beetles do not establish galleries or breed. Trees are generally not expected to die.
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