麦红吸浆虫成虫对线偏振光的趋性

Phototaxis of Sitodiplosis mosellana( Diptera: Cecidomyiidae) adults to linearly polarized light

【目的】本研究旨在探索麦红吸浆虫Sitodiplosis mosellana对线偏振光的趋光效果。【方法】在室内采用自行设计的Y-型管装置,测试了麦红吸浆虫成虫对线偏振光与非偏振光的选择差异,并利用线偏振光诱捕装置进行了田间对比试验。【结果】结果显示,麦红吸浆虫成虫对线偏振光与非偏振光的趋光选择率分别为47.23%和20.31%,且二者之间差异显著;田间设置线偏振光与非偏振光紫外灯对麦红吸浆虫成虫的诱集量分别为:水平线偏振光(60.20)>垂直线偏振光(37.60)>非偏振光(25.60),且水平线偏振光与非偏振光源对麦红吸浆虫的诱集量具有显著差异。【结论】麦红吸浆虫对线偏振光具有较强的偏好性;水平线偏振紫外光诱捕装置与非偏振相比,对麦红吸浆虫有较强的诱集效果。

【Aim】This study aims to explore the phototaxis of Sitodiplosis mosellana adults to linearly polarized light. 【Methods 】 The phototatic rate of S. mosellana adults to the linearly polarized and unpolarized light was tested with a self-designed Y-tube device in the laboratory. Field tests were also carried out to compare the numbers of S. mosellana adults trapped by the linearly polarized and unpolarized UV light traps. 【Results】The results showed that the phototatic rates of S. mosellana adults to linearly polarized and unpolarized light were 47. 23% and 20. 31%,respectively,with obvious difference between them. The highest number of S. mosellana adults（ 60. 20） was trapped by horizontally linearly polarized light,and then by vertical linearly polarized light（ 37. 60） and by unpolarized light（ 25. 60）,and there was obvious difference between the numbers of adults trapped by horizontally linearly polarized light and by unpolarized light. 【Conclusion 】 The preference of S.mosellana to linearly polarized light is stronger than to unpolarized light. Horizontally linearly polarized UV light shows significantly higher trapping efficiency to S. mosellana than unpolarized light.