Effects of Sophora japonica f.pendula Flowers on the Longevity of Harmonia axyridis Adults

doi:10.16409/j.cnki.2095-039x.2017.04.002

Abstract

Abstract: In this paper, we tested the effect of Chinese pagoda tree Sophora japonica f. pendula flowers and their main sugars on longevity of Harmonia axyridis adults. Adults provided with S. japonica flowers had longer average longevity (female:10.96 d, male:10.83 d) than those only with leaves (female:3.98 d, male:3.65 d) under laboratory conditions. Similarly, adults longevity was significantly longer on inflorescences (female:14.72 d, male:15.46 d) than on branches (female:3.90 d, male:3.82 d) under field conditions. When the adults were provided with each of the four sugars (glucose, fructose, sucrose and maltose) as nutrient supplement, their longevity prolonged significantly. The results indicate that the pollen and nectar from S. japonica flower rich in sugars are suitable food sources for H. axyridis adults, and may play a key role in sustaining populations of the predatory ladybeetle when aphid prey is absent.

Key words: coccinellidae, nectar plant, nutrient supplement, sugar

CLC Number:

S476.2

XU Bin, XIU Chunli, ZHANG Wei, YANG Yizhong, LU Yanhui. Effects of Sophora japonica f.pendula Flowers on the Longevity of Harmonia axyridis Adults[J]. journal1, 2017, 33(4): 442-445.

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