多食性（polyphagous）亦称杂食性。某些储粮昆虫以各种不同的植物或动物为食料的习性。常见的有皮蠹科的害虫，它们既取食植物性食料，也取食动物性食料。
有过半种类为多食性，近半为寡食性或仅知一种寄主。
More than a half polyphagous, nearly a half Oligophagous or knowing only one host.
初孵幼虫具有多食性和一定的耐饥性、耐旱性、耐涝性、耐寒性。
The infancy larva had the characteristics of the polyphagy and some endurance with starvation, dry, waterlogging and cold.
该蝇系多食性害虫，对寄主作物有明显的选择性，对烟草有较强的适应性。
The pest is polyphagous, has obvious selectivity for hosts and good adaptability to tobacco.
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