- Spies, Charles J. III
A laboratory comparison of insecticide efficacy was made for spruce budworm, Choristonuera fumiferana (Clem.) , and the spruce coneworm, Dioryctria renniculelloides ( Mutuura and Monroe), with a bioassay using a treated read spruce, Picea rubens (sarg.) foliage diet.
The results show that coneworm control on red spruce is made more difficult by its relative resistance to some insecticides. This, along with the efficient concealment behavior of both budworm and coneworm, should be taken into account when developing strategies for red spruce protection.