Ecological Study on the Barnyard Grass Stem Borer, Enosima leucotaeniella(RAGONOT)(Lepidoptera:Pyralidae) : IX. Effect of Temperature on Carbohydrate Contents in Diapausing and Early Post-Diapausing Larvae

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The relationship between temperature and carbohydrate contents was investigated in diapausing and early post-diapausing larvae of Enosima leucotaeniella. Larvae collected in October (diapause) and December (early post-diapause) were incubated for 30 days at six different temperatures (0 to 25°C). Trehalose contents in both the haemolymph and body were high at lower temperatures below 15°C and reached a maximum at 5°C in the overwintering larvae, irrespective of diapausing stage. However, the trehalose contents in early post-diapausing larvae were usually lower than those in diapausing ones. Glycogen contents were almost inversely proportional to trehalose contents, but decreased without increase of trehalose contents in early post-diapausing larvae at 20° and 25°C. Total carbohydrate contents (trehalose plus glycogen) in early post-diapausing larvae decreased at the higher temperatures, but were almost constant in diapausing larvae at every temperature.

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