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Larva of pissodes weevil, Pissodes pini, and its frass (excrement) and tunneling beneath bark, exposed.

Larva of pissodes weevil, its frass (excrement) and tunneling beneath bark, exposed. Credit: Milan Zubrik, Forest Research Institute - Slovakia, Bugwood.org — Credit: Milan Zubrik, Forest Research Institute - Slovakia, Bugwood.org

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