Dieback of pine shoots infected with pine wilt nematodes, Bursaphelenchus xylophilus.

Dieback of pine shoots infected with pine wilt nematodes. Credit: USDA Forest Service - North Central Research Station, Bugwood.org<br />Licensed under a <a href="https://creativecommons.org/licenses/by/3.0/us/">Creative Commons Attribution 3.0 License</a>
Credit: USDA Forest Service - North Central Research Station, Bugwood.org
Licensed under a Creative Commons Attribution 3.0 License