Oliveira H N, Zanuncio J C, Pratissoli D, Picanço M C
Departamento de Biologia Animal, Setor Entomologia, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36571-000, Brazil.
Braz J Biol. 2003 Nov;63(4):647-53. doi: 10.1590/s1519-69842003000400011. Epub 2004 Mar 15.
Individuals of two populations of Trichogramma maxacalii (Hymenoptera: Trichogrammatidae) were collected from eggs of Euselasia apisaon (Lepidoptera: Riodinidae), a lepidopteran defoliator of Eucalyptus, in plantations in the states of São Paulo and Minas Gerais, Brazil. This study investigated the sex ratio, number of parasitoids per egg, and longevity of individuals of these two populations of T. maxacalii, when this parasitoid was reared receiving eggs of the factitious host Anagasta kuehniella (Lepidoptera: Pyralidae) in different periods after emergence, and with or without honey. Sex ratio of T. maxacalii varied from 0.44 to 0.60, and was affected by the interaction between populations, availability of food (honey), and length of time in which the parasitoid stayed without host eggs after their emergence. The population of T. maxacalii collected in São Paulo produced a larger number of individuals per egg of the host A. kuehniella and lived longer when fed.
从巴西圣保罗州和米纳斯吉拉斯州种植园中的桉树叶鳞翅目食叶害虫尤氏埃尺蛾（Euselasia apisaon，鳞翅目：燕蛾科）的卵中收集了两群麦氏赤眼蜂（Trichogramma maxacalii，膜翅目：赤眼蜂科）的个体。本研究调查了这两群麦氏赤眼蜂个体的性别比例、每枚卵的寄生蜂数量以及寿命，该寄生蜂在羽化后的不同时间段，以或有或无蜂蜜的人工寄主米蛾（Anagasta kuehniella，鳞翅目：螟蛾科）的卵饲养。麦氏赤眼蜂的性别比例在0.44至0.60之间，受种群间相互作用、食物（蜂蜜）供应以及寄生蜂羽化后无寄主卵的停留时间长短的影响。在圣保罗收集的麦氏赤眼蜂种群，每枚寄主米蛾卵产生的个体数量更多，且取食时寿命更长。
