不同波长LED光源对韭菜迟眼蕈蚊生殖行为的影响

Effects of LED lights at different wavelengths on the reproductive behaviors of Bradysia odoriphaga(Diptera: Sciaridae)

【目的】明确不同波长的LED光源对韭菜迟眼蕈蚊Bradysia odoriphaga Yang et Zhang求偶、交配及繁殖等生殖行为的影响。【方法】采用红（625～630 nm）、橙（600～605 nm）、黄（590～595nm）、绿（525～530 nm）、蓝（455～460 nm）和白（6 000～6 500 k）6种LED光源在韭菜迟眼蕈蚊成虫交配期进行照光处理,观察统计其求偶和交配行为以及单雌产卵量、卵孵化情况和有效后代数量。【结果】韭菜迟眼蕈蚊成虫求偶前期时长在橙光下最长,为28.48 min。求偶率在蓝光下最高,为86%;橙光下最低,为48%。交配期时长在蓝光下最长,为4.59 min;橙光下较短,为4.23 min。单雌产卵量在各波长光源下与对照均无显著差异。卵孵化率在蓝光下最低,仅为43.41%。有效后代数量在蓝光下最低,仅为27.00头;橙光下次之,为43.40头。【结论】LED光源的波长可影响韭菜迟眼蕈蚊的生殖行为,其中橙光（600～605 nm）不利于其求偶、交配和繁殖;蓝光（455～460nm）虽有利于其求偶和交配,但明显抑制其繁殖。

【Aim】This study aims to clarify the effects of LED lights at different wavelengths on the reproductive behaviors such as courtship,mating and reproduction of Bradysia odoriphaga. 【Methods】The behaviors of courtship and mating,the number of eggs laid per female,the egg hatching rate and the number of effective offspring of B. odoriphaga under six different LED lights（ red,625- 630 nm;orange,600- 605 nm; yellow,590- 595 nm; green,525- 530 nm; blue,455- 460 nm; and white,6 000- 6 500 k） were observed and recorded. 【Results】The precalling period of B. odoriphaga was the longest under orange light（ 28. 48 min）. The calling rate was the highest under blue light（ 86%）,while was the lowest under orange light（ 48%）. The mating period was the longest under blue light（ 4. 59min）,and was lower under orange light（ 4. 23 min）. The number of eggs laid per female had no significant difference between the control group and any experimental group. The egg hatching rate was the lowest under blue light（ 43. 41%）. The number of effective offspring was the lowest under blue light（ 27. 00） and was lower under orange light（ 43. 40）. 【Conclusion】The wavelength of LED lights may influence the reproductive behaviors of B. odoriphaga. The orange LED light（ 600- 605 nm） is detrimental to its courtship,mating behaviors and reproduction. Blue LED light（ 4 5 5- 4 6 0 nm） is beneficial to its courtship and mating behaviors,but significantly restrains its reproduction.