温度对十种赤眼蜂体色的影响

Effects of temperature on the body color of ten species of Trichogramma(Hymenoptera:Trichogrammatidae)

【目的】本研究旨在明确温度对赤眼蜂Trichogramma spp.成蜂体色的影响。【方法】分别在18和30℃条件下饲养卷蛾赤眼蜂T.cacoeciae、食胚赤眼蜂T.embryophagum、短管赤眼蜂T.pretiosum、螟黄赤眼蜂T.chilonis、广赤眼蜂T.evanescens、玉米螟赤眼蜂T.ostriniae、松毛虫赤眼蜂T.dendrolimi、微小赤眼蜂T.minutum、土耳其赤眼蜂T.turkestanica和稻螟赤眼蜂T.japonicum 10种赤眼蜂成蜂,并采用RGB色彩模式作为体色判别标准对比18和30℃条件下饲养的赤眼蜂的体色差异。【结果】18和30℃下饲养的10种赤眼蜂成蜂体色存在明显差异,表现为18℃下饲养的赤眼蜂成蜂较30℃下饲养的赤眼蜂成蜂体色深。其中卷蛾赤眼蜂成蜂体色的变化最明显:18℃下饲养时胸部为黄褐色、腹部为黑褐色;30℃时胸腹部均为浅黄色。在18和30℃下饲养时,10种赤眼蜂成蜂胸部中胸盾片与小盾片、腹部第1-3节或腹中部的体色变化明显。18℃下饲养的10种赤眼蜂成蜂体色RGB值显著低于30℃下饲养的,且螟黄赤眼蜂、广赤眼蜂、玉米螟赤眼蜂、松毛虫赤眼蜂和微小赤眼蜂雌成蜂体色的RGB值显著高于雄成蜂。【结论】温度能够显著影响赤眼蜂成蜂的体色,饲养温度越高,赤眼蜂成蜂的体色越浅。

【Aim】This study aims to clarify the effects of temperature on the body color of adults of Trichogramma spp.【Methods】Adults of ten species of Trichogramma wasps,including T.cacoeciae,T.embryophagum,T.pretiosum,T.chilonis,T.evanescens,T.ostriniae,T.dendrolimi,T.minutum,T.turkestanica and T.japonicum were reared at 18 and 30℃,respectively.And the RGB color mode was used as the body color judgment standard to compare the body color differences of adults of the 10 species of Trichogramma reared at 18 and 30℃.【Results】There were obvious differences in the body color of adults of the 10 species of Trichogramma reared at 18 and 30℃.The body colors of adults of 10 species of Trichogramma reared at 18℃were darker than those reared at 30℃.Among them,T.cacoeciae adults showed the most obvious change in body color:the thorax was in yellowish brown and the abdomen was in dark brown at 18℃;however,the thorax and abdomen were in light yellow at 30℃.The adults of the 10 species of Trichogramma reared at 18 and 30℃had obvious changes in the body color in their mesoscutum and scutellum,as well as the 1st-3rd segments of abdomen or the mid-abdomen.The RGB values of the body colors of adults of the 10 species of Trichogramma reared at 18℃were significantly lower than those reared at 30℃.For T.chilonis,T.evanescens,T.ostriniae,T.dendrolimi and T.minutum,the RGB values of the body colors of female adults were significantly higher than those of males.【Conclusion】Temperature can significantly affect the body color of adults of Trichogramma spp.The higher the rearing temperature,the lighter the body color of adults of Trichogramma.