词汇 | alate |
释义 | BETA Examples of alatealate isn’t in the Cambridge Dictionary yet. You can help! A set of keys concentrating on the alate morph and without recourse to plant host information is doubly welcome. In some cases, alate morphs are produced and these disperse before ovipositing eggs that develop into further apterous generations. Three types of morphologically similar alate females were produced. This selection promotes the evolution of improved efficacy of host-plant selection by alate colonizers. Thus, in general the life stage structure on resistant varieties was dominated by alate adults and first instar nymphs (fig. 2). In all three aphid species tested, the alate adult is the stage most responsible for host selection. The alate viviparous female has four or more hairs on the first tarsal segment. Clearly the numbers of alate colonizers, if not genotype, are evenly distributed in terms of host preference. Aphids, given short days prenatally or in the first instar, produced alate female progeny that were all gynoparae. However, the colonization decisions by alate aphids are important factors responsible for the development of populations on particular hosts. Interestingly, this result was the complete reverse of the results from the alate host choice experiment. The adult reproductive was said to pass through five nymphal instars prior to development into an alate. They produce mainly apterous and alate virginoparae and a number of males and intermediate alatae. Alate which has formed a new colony after having lost its wings. |
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