FOREST ECOLOGY
FOREST MANAGEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How do trees fight back against bark beetle attacks?
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They can’t fight back; infested trees die
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They release pitch that traps the beetle, pushes is out, and suffocates it
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They use chemicals that poison the beetle
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They will self-prune the infested portion of their limbs and/or trunk
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Explanation:
Detailed explanation-1: -Bark beetles have a diverse and important community of natural enemies. The community includes predators such as birds, beetles, flies, true bugs, and mites; parasitoids such as wasps and flies; pathogens such as viruses, bacteria, fungi, microsporidia, and protozoa; as well as nematodes.
Detailed explanation-2: -An overwhelming majority of bark beetle species only colonize dead or severely stressed trees (left).
Detailed explanation-3: -When the male beetle initiates the boring in the bark of trees, he produces a pheromone which attracts female beetles and other males. The two major components of the aggregation pheromone are (S) chaos-verbenol and 2-methyl-3-buten-24.
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