1 Entomology Department, Federal University of Viçosa, Viçosa-MG, Cep 36571-000, Brazil.
J Insect Sci. 2013;13:105. doi: 10.1673/031.013.10501.
The effects of varying photophase conditions on biological parameters of Mahanarva fimbriolata (Stal) (Hemiptera: Cercopidae), nymphs and adults were evaluated. Eggs of a late developmental stage were placed near sugarcane roots (cultivar RB739735) maintained in a greenhouse (21 ± 7 °C, 90 ± 10% RH). Nymphs and adults were exposed to the following photophase conditions: (a) 13:11 L:D as nymphs and adults, (b) 13:11 as nymphs and 12:12 as adults, (c) 12:12 as nymphs and adults, and d) 12:12 as nymphs and 13:11 as adults. Exposure of nymphs to 13 hr of light significantly reduced the duration of the nymphal stage and the number of nymphs that matured to adults. The duration of the nymphal stage was longer in individuals developing into females than in those developing into males. There was an increase in the longevity of adults kept at 13 hr of light since the nymphal stage. The average longevity of adult males and females was approximately the same. The sex ratio was similar under all photophase conditions. The life cycle of insects kept at 12 and 13 hr of light during nymphal and adult stages respectively was extended. The total life cycle was significantly longer in M. fimbriolata females than males. The different photophase conditions did not affect the reproductive potential of M. fimbriolata. Females produced more diapausing than non-diapausing eggs, except when under 13- and 12-hr light conditions. There was no significant difference in the number of diapausing and non-diapausing eggs produced by females under the other photophase conditions.
研究了不同光周期条件对斜绿宽盾蝽（Mahanarva fimbriolata）（半翅目：盾蝽科）若虫和成虫生物参数的影响。将处于晚期发育阶段的卵放置在温室中靠近甘蔗根（品种 RB739735）附近（21±7°C，90±10%RH）。将若虫和成虫暴露于以下光周期条件下：（a）成虫和若虫 13:11 L:D，（b）若虫 13:11，成虫 12:12，（c）若虫和成虫 12:12，（d）若虫 12:12，成虫 13:11。若虫暴露于 13 小时光照下显著缩短了若虫期的持续时间和成熟为成虫的若虫数量。发育为雌性的个体的若虫期持续时间长于发育为雄性的个体。在 13 小时光照下，成虫的寿命延长。成虫的平均寿命雄性和雌性大致相同。在所有光周期条件下，雌雄性别比例相似。在分别处于 12 小时和 13 小时光周期的若虫和成虫阶段的昆虫的生命周期延长。斜绿宽盾蝽雌性的总生命周期明显长于雄性。不同的光周期条件没有影响斜绿宽盾蝽的生殖潜力。雌性产生的滞育卵多于非滞育卵，但在 13 小时和 12 小时光照条件下除外。在其他光周期条件下，雌性产生的滞育卵和非滞育卵数量没有显著差异。
