吡虫啉对3种体色型烟蚜取食行为的影响

The effects of imidacloprid on the feeding behaviors of Myzus persicae in three colors

为探究吡虫啉对红色型、绿色型和褐色型3种体色型烟蚜取食行为的影响,利用刺探电位图谱(EPG)技术比较3种体色型烟蚜在吡虫啉处理后的烟苗上的取食行为。结果表明:33.3 mg/L吡虫啉处理烟苗后,3种体色型烟蚜的非刺探总时间(np波)均长于清水处理的绿色型烟蚜,其中褐色型烟蚜最长,且与清水处理的绿色型烟蚜存在显著性差异(P<0.05);刺探过程中,3种体色型烟蚜在烟苗上口针遇到阻力(F波)的时间均长于清水处理的绿色型烟蚜,但处理间差异不显著;木质部取食阶段,褐色型烟蚜的G波平均持续时间最长;韧皮部取食阶段,3种体色型烟蚜口针在韧皮部分泌唾液(E1波)和被动吸食汁液(E2波)的总持续时间均短于清水处理的绿色型烟蚜,其中被动吸食汁液的时间红色型为15.87±9.33 min,绿色型为29.89±8.79 min,而褐色型仅为6.38±2.15 min。因此,吡虫啉处理烟苗后能明显抑制烟蚜对烟草韧皮部的取食。

To explore the effects of imidacloprid on the feeding behavior of Myzus persicae of three colors：Red, green and brown and the electronic penetration graph （ EPG ） was used to compare the feeding behavior of M. persicae of three colors on the tobacco seedlings treated with imidacloprid. The results showed that under the effect of the tobacco seedlings treated with 33. 3 mg/L imidacloprid, the total non-probing duration of M. persicae of three colors was longer than green aphid treated by water. Among them, the brown aphid＆#39;s was the longest and was significantly different from green aphid treated by water （ P＆lt;0. 05 ） . In the process of probing, the probing duration of M. persicae of three colors was longer than green aphid treated by water when the stylet met with resistance （ F wave ） , but there was no significant difference among treatments. When feeding started on the xylem, G waves in brown aphids was the longest. Once feeding started on the phloem, the total duration of watery salivation （ E1 wave） and passive ingestion （ E2 wave） was shorter than green aphid treated by water, and the duration of passive ingestion （ E2 waveform） of the red type is 15. 87 ＆#177; 9. 33 min, the green type was 29. 89 ＆#177; 8. 79 min and the brown type was just 6. 38 ＆#177; 2. 15 min. In conclusion, the feeding behavior of M. persicae on phloem was significantly inhibited on the tobacco seedlings treated with imidacloprid.