One of the mysteries of the English language finally explained.
1A black or dark green aphid which is a common pest of crops and gardens.
- ‘Most common are greenfly on roses and blackfly on nasturtiums and broad beans, but dozens of their relations also attack other plants.’
- ‘And try to avoid ‘revenge spraying’ - which is what happens when blackfly, for example, have ruined your roses.’
- ‘Hover flies and lace wings control aphids and blackfly.’
- ‘One or two other insidious pests have crept almost unnoticed into my garden this month including blackfly, which have infested the tall flowering stems of the cardoons.’
- ‘But the sunny weather has suited greenfly and blackfly, while mildew has affected several plants.’
2A small black fly, the female of which sucks blood and can transmit a number of serious human and animal diseases.
- ‘When you're not underwater, coat yourself in deet or be eaten alive by bloodthirsty blackflies.’
- ‘Similarly, as soon as I crossed the doorstep, the June hordes of bloodsucking blackflies and horseflies left off their hot pursuit.’
- ‘In fact, in their effort to discourage the world's mosquitoes, blackflies, sand flies and ticks, consumers spend an estimated $200 million annually on sprays, liquids, lotions, candles and other anti-insect concoctions.’
- ‘Similarly, the device mimics a human by emitting a plume of carbon dioxide, heat and moisture, and an attractant, octenol, which targets mosquitoes, biting midges, black flies and sandflies.’
- ‘Other blood feeding insects or mites that may occasionally be pests of poultry include: chigger mites, biting midges, and black flies (turkey gnats).’
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