第十七章昆虫的生殖方法 第二节昆虫的生殖方法 (2)专性孤雌生殖 周期性狐雌生殖 Morphs on Buckthorn Morphs on Soybean 图 (Winter Host) (Summer Host) SUMMER MORPH SPRING MIGRANTS 妖虫的周期性孤雌生殖 Fundatrix (Stem Mother) apterac An山ope-MALE Eggs laid by b FALL MIGRANTS (SEXUALS) Gynoparae-FEMALE Colonies on soybean