Heteroecious Denoting rust fungi that require two host species to complete their life cycle.
转主寄生：描述某些锈菌必须存在两个寄主才能完成它的生活周期。
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Adelgidae has multifarious life history that consist of heteroecious holocyclic, heteroecious anholocyclic and monoecious anholocyclic. Its primary injured symptom is to form galls.