
1) Agricultural pest insect
Found on
https://www.crosswordclues.com/clue/hessian-fly

The hessian fly or barley midge, Mayetiola destructor, is a species of fly that is a significant pest of cereal crops including wheat, barley and rye. Though a native of Asia it was transported into Europe and later into North America, supposedly in the straw bedding of Hessian troops during the American Revolution (1775–83). There are usually t...
Found on
http://en.wikipedia.org/wiki/Hessian_fly

small fly in the gall midge family, Cecidomyiidae (order Diptera), that is very destructive to wheat crops. Though a native of Asia it was ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/h/44

The Hessian Fly (Cecidomyia destructor) is a fly of the family Tipulidae, of the order Diptera, the larva of which is very destructive to wheat, barley and rye crops. It is so named from the unfounded belief, formerly prevalent in America, where it is specially destructive, that it was brought over to that country in the baggage of the Hessian merc...
Found on
http://www.probertencyclopaedia.com/browse/BH.HTM

[
n] - small fly whose larvae damage wheat and other grains
Found on
http://www.webdictionary.co.uk/definition.php?query=Hessian%20fly
Mayetiola destructor noun small fly whose larvae damage wheat and other grains
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.