Zohdy Nawal Zohdy M
Entomologische Abteilung, Institut für Pflanzenpathologie und Pflanzenschutz der Universität, Grisebachstr. 6, D-3400, Göttingen, Germany.
Oecologia. 1976 Jun;26(2):185-191. doi: 10.1007/BF00582896.
The effect of different synthetic diets of the hostMyzus persicae on the parasiteAphelinus asychis was tested. Deficient diets were prepared by reducing sucrose or iron concentration: sucrose concentration was reduced from 15% in the complete diet (D.I.) to 7.5% in D. II and 3.75% in D. III; that of iron from 0.0023% in D. I to 0.0011% in D. IV and 0% in D.V.The development of the immature stages ofA. asychis in aphids fed on the deficient diets was delayed (especially on D. V). The size of the emerging adults was small, which corresponds with the reduced size of the host. The percentage of the male parasites was found to be higher on the deficient diets than on the full one. The lowest average longevity of the females was found among those reared on aphids on D. III and D.V.If honeydew fromM. persicae was offered to the females, a marked reduction in the longevity of these parasites was observed on D. II and D. III. On the other hand, on honeydew from aphids on D. IV and D.V,A. asychis lived as long as on honeydew from those fed on D.I.The fecundity of the females ofA. asychis was found to be dependent on the food composition of the hosts during larval development as well as during adult life.
测试了桃蚜（Myzus persicae）不同合成饲料对蚜茧蜂（Aphelinus asychis）的影响。通过降低蔗糖或铁的浓度来制备缺乏营养的饲料：蔗糖浓度从完全饲料（D.I.）中的15%降至D.II中的7.5%和D.III中的3.75%；铁的浓度从D.I中的0.0023%降至D.IV中的0.0011%和D.V中的0%。在以缺乏营养的饲料喂养的蚜虫体内，蚜茧蜂未成熟阶段的发育延迟（尤其是在D.V饲料上）。羽化出的成虫体型较小，这与宿主体型减小相对应。发现缺乏营养的饲料上雄性寄生蜂的比例高于完全饲料上的。在以D.III和D.V饲料喂养的蚜虫上饲养的雌蜂平均寿命最短。如果给雌蜂提供桃蚜的蜜露，在D.II和D.III饲料上饲养的这些寄生蜂的寿命会显著缩短。另一方面，在以D.IV和D.V饲料喂养的蚜虫的蜜露上，蚜茧蜂的寿命与以D.I饲料喂养的蚜虫的蜜露上的寿命一样长。发现蚜茧蜂雌蜂的繁殖力取决于幼虫发育期间以及成虫期宿主的食物组成。
