| 词汇 | frass |
| 释义 | frass noun[ U ] biology, agriculture specializeduk /fræs/ us /fræs/ excrement(= solid waste from the body) produced by insects, especially by larvae(= insects that have left their eggs but have not yet developed into adult insects): After an unusually heavy caterpillar infestation, the ground underneath the trees was coated with frass. The larvae cover themselves with poop, called frass, which discourages predators. wood dust produced by insects eating wood: If your furniture has holes and powdery wood dust (called frass) falls out of them, then woodworm may be active. The most expensive part of the work is the initial removal of infested wood and frass. Grasshoppers digest only about 12 -20% of the plant material they eat. The rest is excreted as frass, which acts as fertilizer for the surrounding vegetation. Frass, or caterpillar excrement, is a rich source of nitrogen and an excellent growing medium for mould. You'll know you have infested plants if you see sawdustlike excrement, called frass, near bore holes on the vines. The "sawdust" is actually frass: the dust produced by larvae and adults biting through the wood. The development & parts of insects antenna caterpillar chrysalis cocoon eclose eclosion feeler grub larval maggot nit nymph proboscis pupa royal jelly silkworm tegmen thoracic venation worm You can also find related words, phrases, and synonyms in the topics: Improving fertility & pest control |
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