Beetle Larva (image) Penn State Caption The larva of Asian longhorned beetle feeds and develops exclusively on the the inner-wood of deciduous trees. A fungus within its gut alters lignin and makes it easier to break down wood. Credit Joshua Peter Kaffer Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.