As part of the eradication program for recent introductions of thelonghorned beetle Anoplophora glabripennis (Motschulsky) inthe United States, wood from infested trees is chipped and incinerated.Two tests were conducted to evaluate the efficiency of chipping woodfrom infested trees on the survival of the beetle. In the first test,plastic worms were used as surrogates for larvae of the beetle. Plasticworms of different sizes were placed in holes drilled in logs of sugarmaple, Acer saccharum Marsh. In a second test, in additionto plastic worms, we used different instars and pupae of gypsy moth,Lymantria dispar (L.) (Lepidoptera: Lymantriidae); larvae ofthe beetle Phyllophaga annina Lewis (Coleoptera:Scarabaeidae); and larvae of an unidentified weevil (Coleoptera:Curculionidae). Although chipping did not result in an obvious damageto all plastic worms, it did kill all larvae and pupae of insectsplaced in holes of maple logs. The overall recovery rate (percentrecovered) for the plastic worms was 96% in the first (1997) test, and71 and 98% for 10 and 40 mm long plastic worms in the second (1998)test, respectively. Logistic regression analysis of the data from thefirst experiment indicates that larger worms receive more severedamage. Size of logs did not have a significant effect on the level ofdamage received by plastic worms. All recovered insects were severelydamaged after chipping logs and we could not determine recovery rates.Results of the two tests indicate that chipping wood from infestedtrees without incineration of the resulting chips provides a highlyeffective method for destroying wood inhabiting insect pests such asA. glabripennis. The elimination of incineration savesconsiderable resources while effectively eliminating risks associatedwith movements of wood containing living wood-boring insects.
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Vol. 93 • No. 6