HORTICULTURE SCIENCE
DISEASE AND PEST MANAGEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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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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Detailed explanation-1: -Although tree mortality to bark beetles often detracts from forest management goals, the natural role of bark beetles is canopy opening, thinning, and diversification of stand structure and composition, effects that contribute to some ecosystem services in forests managed for multiple uses.
Detailed explanation-2: -Bark beetles frequently attack trees weakened by drought, disease, injuries, or other factors that may stress the tree. Bark beetles can contribute to the decline and eventual death of trees; however only a few aggressive species are known to be the sole cause of tree mortality.
Detailed explanation-3: -An overwhelming majority of bark beetle species only colonize dead or severely stressed trees (left). Tree-killing species may colonize healthy trees during intermittent epidemics (right), but most of the time they are endemic and utilize dead and weakened trees (left).
Detailed explanation-4: -Do you know how the bark beetles became the enemy of the trees? Long ago, bark beetles were not bark eaters at all. They lived in the grass and fed on it.