fressen A gefressen-frass 腐蚀 ; 吞噬
frass tester 弗拉斯试验器
dallis frass 毛花雀稗
frass-drop 落粪
frass holes 排粪孔
The mainly compounds are hydrocarbons, and the relative content of 1, 6-heptadiyne is highest, which is the peculiar material in the volatiles of the host frass.
主要成分为烃类物质，其中含量最高的物质为1，6-庚二炔(57.52％)，这也是虫粪挥发物中所特有的物质。
参考来源 - 桑天牛长尾啮小蜂寄主定向的挥发性信息物质研究·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
N excrement or other refuse left by insects and insect larvae 虫粪
Frass of long-horned beetle larvae plays an important role in natural enemies searching for their cerambycid hosts.
长角甲虫幼虫的部分在寻找天敌的天敌中起着重要的作用。
The number of emergence holes and frass holes in weeping willows on both Banks of Qinhuai river are investigated.
调查了外秦淮河两岸垂柳上光肩星天牛羽化孔、排粪孔的分布情况。
Frass of longhorned beetle larvae plays an important role in natural enemies searching for their cerambycid hosts.
天牛幼虫排出的虫粪所释放的挥发性物质成为天敌搜寻天牛所在微栖境的重要化学信息物质。
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