Variation of population composition of the wheat rust caused the lose of leaf rust resistance in wheat cultivars,and make the rust pandemic.
小麦锈菌的群体组成变化导致小麦抗叶锈病品种丧失抗性,并造成全国小麦锈病的大流行。
参考来源 - 冀、豫、鲁三省小麦叶锈菌致病类型鉴定及毒性分析Objective To determine the density fluctuation and population composition of mosquitoes in Anhui,providing scientific evidence for further development of control and prevention strategies.
目的了解安徽省蚊虫密度消长及种群构成,为制定蚊虫防制措施提供科学依据。
参考来源 - 安徽省蚊虫密度消长及种群构成研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The quality of human resources in a country depends upon its population composition.
一个国家人力资源的质量取决于它的人口构成。
In recent years, there is a great change of city family population composition, which influences the house design directly.
近年来我国城市家庭人口组成发生了巨大的变化，并直接影响到住宅的设计。
The factors that affect spore population composition and seasonal variation of va mycorrhizal fungi were discussed in this article.
本文对影响VA菌根真菌孢子种群组成和季相变化的因素进行了讨论。
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