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English definition of “blackfly”

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noun [C or U] uk   /ˈblæk.flaɪ/ us  
a small black insect with two wings that feeds on the juices of plants: Do your broad beans suffer from blackfly (= are they attacked by blackfly)?
Translations of “blackfly”
in Chinese (Traditional) (吸食植物汁液的)黑蠅…
in Chinese (Simplified) (吸食植物汁液的)黑蝇…
(Definition of blackfly from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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