BIONOMICS OF THE MANCHURIAN CATALPA SHOOT BORER, SINOMPHISA-PLAGIALIS(LEPIDOPTERA, PYRALIDAE) IN SHANDONG, CHINA

Larvae of the Manchurian catalpa shoot borer Sinomphisa plagialis (Wil eman) mainly damaged young shoots of Manchurian catalpa (Catalpa bunge i) and ovate catalpa (Catalpa ovata). The typical symptom was producti on of spindle galls on damaged parts of shoots or branches, usually co nfined to seedlings, vigorously growing shoots, twigs and branches, as well as young trees below 3 m in height. Feeding occurred from early April to late October. In the Jiaodong peninsula, where there were one to two generations in a year, whereas in the mountainous area of cent ral and southern Shandong, there were always two generations. Larvae h ad five instars. The longevity of adults was 3-11 days; eggs of the su mmer generation 7-9 days, overwintering generation 4-6 days; larvae of the summer generation 42-48 days; pupae of the summer generation 13-1 6 days, of the overwintering generation 22-26 days. Most overwintered in the pith as fifth instar Larvae.