环境颜色对韭菜迟眼蕈蚊生物学特性的影响

Effects of environmental color on biological characteristics of Bradysia odoriphaga( Diptera: Sciaridae)

【目的】明确环境颜色对韭菜迟眼蕈蚊Bradysia odoriphaga Yang et Zhang生长发育及繁殖能力等生物学特征的影响。【方法】在室内条件下,利用黑、棕、绿、红和橙5种颜色卡纸模拟自然环境颜色,比较研究了其对韭菜迟眼蕈蚊生长发育和繁殖的影响。【结果】韭菜迟眼蕈蚊发育历期在橙色环境下最长,为26.15 d,黑色环境下最短,为22.35 d;世代存活率在黑色环境下最高,为43.88%,橙色环境下最低,为28.88%;性比在各颜色环境下无显著差异;雌雄成虫寿命均在棕色环境下最长,分别为2.06 d和2.99 d,橙色环境下最短,分别为1.58 d和2.57 d;单雌产卵量在棕色环境下最多,为62.99粒,橙色环境下最少,为45.64粒;种群趋势指数由高到低依次为:黑色(15.90)>棕色(15.07)>透明色对照(12.93)>红色(11.69)>绿色(11.67)>橙色(8.50)。【结论】环境颜色影响韭菜迟眼蕈蚊生物学特性,黑色及棕色环境有利于其生长发育及繁殖,橙色环境可抑制其生长发育及繁殖。

【Aim 】 This study aims to clarify the effects of environmental colors on biological characteristics such as development and fecundity of Bradysia odoriphaga. 【Methods 】 In laboratory conditions, the development and reproduction capability of B. odoriphaga were investigated in environments with different background color（ black,brown,green,red and orange）. 【Results】The developmental duration of B. odoriphaga was the longest in orange environment（ 26. 15 d）,while was the shortest in black environment（ 22. 35 d）. The generation survival rate was the highest in black environment（ 43. 88%） and lowest in orange environment（ 28. 88%）. There was no significant difference between sex ratios in environments with different background color. The adult longevity of both females and males was the longest in brown environment（ 2. 06 d and 2. 99 d,respectively） and shortest in orange environment（ 1. 58 d and 2. 57 d,respectively）. The number of eggs laid per female was maximmal（ 62. 99） in brown environment and the least（ 45. 64） in orange environment. The indexes of population trend between different treatments（ from high to low） were： black（ 15. 90） brown（ 15. 07） transparent contrast（ 12. 93） red（ 11. 69） green（ 11. 67） orange（ 8. 50）. 【Conclusion 】Environmental colors significantly influence the biological characteristics of B. odoriphaga. Black and brown environments facilitate its development and fecundity,while orange environment restrain both.