Study on the Fertilizer Efficiency of the Frass of Tenebrio Molitor L.
黄粉虫虫粪的肥效研究。
The brown you see is frass, what comes out the back end of the insect.
你看到的棕色物质是虫粪,它是从害虫子的后端出来的。
Look for signs of insect activity such as holes, webbing, casts and frass.
寻找昆虫活动的迹象,如洞孔,带子,和昆虫的粪便等。
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