What characterizes the holocyclic life cycle of the woolly apple aphid?
Answer
Requiring two different hosts: a primary woody host and a secondary herbaceous host.
The holocyclic life cycle involves alternation between two distinct host plants to complete the full reproductive sequence. Specifically, species like the woolly apple aphid require a primary woody host, such as apple or pear trees, for one part of their cycle, and then migrate to a secondary, often herbaceous host, frequently an elm species, for the other part. This host alternation is a key feature distinguishing holocyclic species from monoecious species that complete their entire life cycle on one type of plant.
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