pear-tree psylla

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• pear tree psylla — noun see pear psylla …   Useful english dictionary

• pear psylla — noun also pear tree psylla : a yellowish or greenish jumping plant louse (Psylla pyricola) that is often destructive to the pear called also pear louse * * * a small jumping plant louse, Psylla pyricola, originally of Europe, that is a major pest …   Useful english dictionary

• Psylla pyri — Flea louse Flea louse , n. (Zo[ o]l.) A jumping plant louse of the family {Psyllid[ae]}, of many species. That of the pear tree is {Psylla pyri}. [1913 Webster] …   The Collaborative International Dictionary of English

• Flea-louse — n. (Zo[ o]l.) A jumping plant louse of the family {Psyllid[ae]}, of many species. That of the pear tree is {Psylla pyri}. [1913 Webster] …   The Collaborative International Dictionary of English

• homopteran — /heuh mop teuhr euhn, hoh /, adj. 1. homopterous. n. 2. a homopterous insect. [1835 45; see HOMOPTEROUS, AN] * * * ▪ insect order Introduction   any of more than 32,000 species of sucking insects, the members of which exhibit considerable… …   Universalium