Definition of psylla in English:
A minute insect of a family (Psyllidae) that comprises the jumping plant lice.
- The esters are lethal - almost immediately - to nearly all the mites and soft-bodied insects such as whiteflies, aphids, thrips, and pear psylla that they contact.
- The lid, sides, and floor of each container were examined for pear psylla, predatory insects, and spiders.
- Nymphs, or immature psylla, spend much of their time immersed in a droplet of sticky honeydew and only move out of it to prepare for the adult stage.
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