| To understand the difference of response to photoperiod and temperature in larvae of the Asian corn borer, Ostrinia
furnacalis Guenee, we compared larval duration of the Asian corn borer, O. furnacalis from two different latitude (Nanchang, Jiangxi, 28.7°N, 115.9°E; Yangshuo, Guangxi, 24.8°N, 110.5°E) at 20, 22, 25, 28 and 31℃ and in L16:D8, L15:D9, L14:D10, L13:D11, L12:D12, and L11:D13. The results indicated that the difference of larval duration in two geographic populations decreased with temperature increasing and photoperiod extending. Most larvae entered diapause and there were few pupae in L12:D12 and L11:D13. These results further suggestted that the geographic variation in larval duration may be different under different experimental conditions in the same specie of insects. |
