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onion fly

   Also found in: Encyclopedia 0.01 sec.
onion fly
n
(Life Sciences & Allied Applications / Animals) a small grey dipterous insect, Delia antiqua, that is a serious pest of onions. The larvae destroy the bulbs


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Once up, this allows you to stretch over a fine meshcover - perfect for allowinglight in butreducing winddamage and eliminating flying pestssuch as aphids,flea-beetle, carrot fly and onion fly.
This will prevent pests such as the onion fly maggot over-wintering so easily as they'll get eaten by birds or killed off by the frost.
Generally, onion sets produce an easier crop in Scotland and are less prone to onion fly and mildew.
 
 
 
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