Toma Luciano, Severini Francesco, Di Luca Marco, Bella Antonino, Romi Roberto
Laboratorio di Parassitologia, Istituto Superiore di Sanità, Roma, Italy.
J Am Mosq Control Assoc. 2003 Mar;19(1):19-22.
Since its introduction in Italy in 1990, Aedes albopictus has spread quickly across the northern and central regions of the country. The Italian populations of the species probably originated from temperate areas and are able to survive the cold season through the production of diapausing eggs. In 1997, Ae. albopictus was detected in Rome, where it seems to have found ideal environmental conditions for proliferating and extending its season of activity. In 2000, we carried out a study to evaluate the length of the season favorable to the species in Rome and the factors that might induce production of diapausing eggs. Adults of the species were reported to be active from February-March to December, peaking in August-September. Female Ae. albopictus produced different numbers of summer eggs throughout the study. The peak of egg hatching occurred at the 35th week of the year (end of August). Starting from the 36th week, when the photoperiod dropped below 14:10 h light:dark, a rapid decrease in summer egg production was recorded; the minimum value (17%) was reached during the 1st week of October. A new rise in egg hatching was recorded in October-November, probably because of a polymorphism in the diapause response of the population of Ae. albopictus and to the persistence of mild temperatures up to the end of November. Eggs completely ceased to hatch in mid-December.
自1990年在意大利首次被发现以来，白纹伊蚊已迅速蔓延至该国北部和中部地区。意大利的白纹伊蚊种群可能起源于温带地区，能够通过产滞育卵度过寒冷季节。1997年，在罗马检测到白纹伊蚊，在那里它似乎找到了理想的繁殖环境并延长了活动季节。2000年，我们开展了一项研究，以评估罗马对白纹伊蚊有利的季节长度以及可能诱导滞育卵产生的因素。据报道，该物种的成虫在2月至3月至12月期间活跃，8月至9月达到高峰。在整个研究过程中，白纹伊蚊雌蚊产下了不同数量的夏季卵。卵孵化高峰期出现在一年中的第35周（8月底）。从第36周开始，当日照时长降至14:10小时光照：黑暗以下时，夏季卵产量迅速下降；10月的第1周降至最低值（17%）。10月至11月记录到卵孵化率再次上升，这可能是由于白纹伊蚊种群滞育反应的多态性以及直到11月底温和气温的持续存在。12月中旬卵完全停止孵化。
