Thus, CMS lines are needed to improve insect pest resistance in hybrid rice.
因此，杂交稻抗虫性的提高有赖于不育系的改良。
P. massoniana showed fast height growth but poor natural trimming , crooked bole, low insect pest resistance.
而马尾松的树高生长虽然较快，但自然整枝较差，树干不通直，且虫害较严重，抗性差；
This paper briefly describes the historical evolution of insect resistance, molecular mechanisms and pest resistance management.
本文简要阐述了昆虫抗药性的历史演变、分子机制及害虫的抗性治理。
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