关键词: 麦长管蚜, 小麦, UV-B辐射, 生命表, 取食行为, 刺探电位图谱

Abstract: 【Aim】 To explore the indirect effects of UV-B radiation on the life table parameters and feeding behavior of Sitobion avenae (Fabricius). 【Methods】 Age-specific life table was established to evaluate the life table parameters. The effect on feeding behavior of S. avenae was studied using electrical penetration graph (EPG). 【Results】 The results revealed that the life table parameters such as the intrinsic rate of increase (r_m), the net rate of increase (R₀), fecundity (F) and the mean length of a generation (T) of S. avenae feeding on the wheat exposed to the high-intensity (0.75 mW/cm²) UV-B radiation were significantly lower than those in the control (S. avenae feeding on the wheat grown under fluorescent lamp). The corresponding parameters tested in the low-intensity (0.2 mW/cm²) UV-B radiation group were basically identical with that in the control group. Similarly, compared with the control group, the number of np waveform increased and the duration time of C wave prolonged significantly in the highintensity UV-B radiation group. The results indicated that the difficulty of feeding behavior for S. avenae was elevated and the effective feeding time decreased due to the UV-B irradiation. Although the time for the first occurrence of pd waveform was not significantly different between the lowintensity UV-B radiation group and the control group, it was delayed in the two UV-B treatment groups. 【Conclusion】 High-intensity UV-B stress on wheat could undermine the growth, development and feeding behavior of S. avenae.

Key words: Sitobion avenae, wheat, UV-B radiation, life table, feeding behavior, electrical penetration graph (EPG)