ECOLOGICAL STUDY ON THE BARNYARD GRASS STEM BORER, ENOSIMA LEUCOTAENIELLA (RAGONOT) (LEPIDOPTERA, PYRALIDAE) .9. EFFECT OF TEMPERATURE ON CARBOHYDRATE CONTENTS IN DIAPAUSING AND EARLY POST-DIAPAUSING LARVAE

The relationship between temperature and carbohydrate contents was inv estigated in diapausing and early post-diapausing larvae of Enosima le ucotaeniella. Larvae collected in October (diapause) and December (ear ly post-diapause) were incubated for 30 days at six different temperat ures (0 to 25-degrees-C). Trehalose contents in both the haemolymph an d body were high at lower temperatures below 15-degrees-C and reached a maximum at 5-degrees-C in the overwintering larvae, irrespective of diapausing stage. However, the trehalose contents in early post-diapau sing larvae were usually lower than those in diapausing ones. Glycogen contents were almost inversely proportional to trehalose contents, bu t decreased without increase of trehalose contents in early post-diapa using larvae at 20-degrees and 25-degrees-C. Total carbohydrate conten ts (trehalose plus glycogen) in early post-diapausing larvae decreased at the higher temperatures, but were almost constant in diapausing la rvae at every temperature.