Abstract
Box-tree pyralid, Glyphodes perspectalis(Walker), is one of the serious lepidopterous insect pests of box trees. In late April 2014, this insect pest occurred and heavily injured the box trees in our center, which is located at Toyohashi city in Aichi Prefecture. Therefore, the susceptibility of G. perspectalis to 18 insecticides was evaluated by the leaf-dipping method. Of the 18 insecticides tested, 14 gave 100% mortality at their respective commercially used concentrations. In particular, fipronil, spinosad, and spinetoram exhibited very high insecticidal activity.
In addition, PAP, thiodicarb, flubendiamide, metaflumizone, and pyridalyl exhibited high insecticidal activity. Comparison of the insecticidal susceptibility of G. perspectalis with that of the common cutworm, Spodoptera litura (Fabricius), showed that G. perspectalis was more susceptible than S. litura except against lufenuron.
These results indicate that G. perspectalis can be easily controlled by using insecticides effective against S. litura.
