品北农林升枚大学 NORTHWEST A&F UNIV国Rsr型 Oat bird-cherry aphid has either an anholocyclic life cycle in mid-southern China or a heteroecious holocyclic life cycle in northern China.Eggs overwinter on fruit trees. 888880Oat bird-cherry aphid has either an anholocyclic life cycle in mid-southern China or a heteroecious holocyclic life cycle in northern China. Eggs overwinter on fruit trees