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A lodgepole pine tree infested by the mountain pine beetle, with visible pitch tubes. Beetles develop through four stages: egg, larva, pupa and adult.Except for a few days during the summer when adults emerge from brood trees and fly to attack new host trees, all life stages are spent beneath the bark.
Other signs of Ips infestation include particles of wood dust accumulating on the bark, foliage, and nearby objects as a result of the beetles' tunneling activity. The wood dust can mix with resin that bleeds from the injury site, creating whitish or reddish pitch tubes, [ 6 ] but these are more common in Dendroctonus infestations. [ 3 ]
Dendroctonus frontalis, the southern pine beetle, [1] often shortened to simply SPB, is a species of bark beetle native to the forests of the southern United States, Mexico and Central America. [2] It has recently expanded its range to the northeastern United States , where it is considered an invasive species and has destroyed massive amounts ...
According to the Southern Pine Beetle Prediction website, Brunswick and Pender counties had a 0.2% chance of an outbreak in 2024, with spot infestations running at about 4%. The rest of the state ...
Adult Ips pini beetles commence their active phase within the early stages of tree life. This phase is characterized by the emergence of infestations in trees, which may be freshly damaged or have sustained damage during the winter months. Such infestations serve as a visible indicator of the beetles' activity and their impact on forest ecosystems.
The nematodes drop off the beetle, and infect healthy pine trees when the adult beetles eat the young pine branches. [16] The pine wilt nematode is spread by a number of bark beetles and wood borers, typically associated with the genus Monochamus of pine sawyers. [17] Pine sawyers lay their eggs in the bark of dead timber.