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为了解张家界地区所产角倍蚜Schlechtendalia chinensis(Bell)秋迁蚜及越冬若蚜的耐寒性及两虫态间在耐寒性方面的差异,应用过冷却点测定仪,抽样测定了上述两虫态个体的过冷却点和体液结冰点,结果表明:秋迁角倍蚜过冷却点和体液结冰点的平均值、最低值和最高值分别依次为-13.32±0.77,-15.69,-11.12℃和-13.00±0.72,-14.54,-10.80℃;而无翅若蚜过冷却点和体液结冰点的平均值、最低值和最高值分别依次为-18.95±0.82,-20.24,-17.02℃和-18.70±0.82,-20.07,-16.95℃。方差分析表明,越冬若蚜的过冷却点和体液结冰点都明显低于秋迁蚜的过冷却点和体液结冰点,进而推测,越冬若蚜的耐寒能力要显著强于秋迁蚜的耐寒能力。试验还表明,张家界地区角倍蚜的次生寄主苔藓(侧枝匐灯藓Plagiomnium maximoiczii)通过人工植藓可在小型聚酯瓶(polyester bottle)内正常生长,接种后的秋迁蚜可顺利生产若蚜,若蚜也能顺利产织蜡球进而度过寒冷的冬天直至下一年春迁蚜产生。
In order to understand the cold resistance of autumnleaf aphid and wintering aphid Schlechtendalia chinensis (Bell) and the difference in cold tolerance between the two insect populations in Zhangjiajie, the supercooling point detector was used to determine the above two insect states Individual supercooling point and body fluid freezing point. The results showed that the average value, the lowest value and the highest value of the subcooling point and the body fluid freezing point were respectively -13.32 ± 0.77, -15.69, -11.12 ℃ And -13.00 ± 0.72, -14.54 and -10.80 ℃, respectively. However, the mean and minimum values of freezing point and body freezing point were -18.95 ± 0.82, -20.24 and -17.02 ℃, respectively -18.70 ± 0.82, -20.07, -16.95 ° C. Analysis of variance showed that the overcooling point and the freezing point of the body fluid of the wintering Aphis were significantly lower than the supercooling point and body fluid freezing point of the Aphis gossypii, and then it was speculated that the cold tolerant ability of the overwintering Aphis is significantly stronger than that of the autumn Cold-resistant ability. The experiment also showed that the secondary host moth (Plagiomnium maximoiczii) in the family Aphis gossypii in Zhangjiajie area can grow normally in small polyester bottles through artificial moss, and the autumn moth aphid can be successfully produced if inoculated Aphids, if the aphids can also smooth the wax ball and then spend the cold winter until the next spring aphid generation.