Their damage is usually not as severe as that of certain beetles in the genus Dendroctonus , which sometimes share the habitat .
If the resources then dwindle , the large populations move into stands of healthy trees and become a problematic infestation .
populations ' damage is usually not as severe as that of certain beetles in the genus Dendroctonus , which sometimes share the habitat .
If the resources then dwindle , the large populations move into stands of healthy trees and become a problematic infestation .