Wheat aphid

Wheat \Wheat\ (hw[=e]t), n. [OE. whete, AS. hw[=ae]te; akin to
   OS. hw[=e]ti, D. weit, G. weizen, OHG. weizzi, Icel. hveiti,
   Sw. hvete, Dan. hvede, Goth. hwaiteis, and E. white. See
   {White}.] (Bot.)
   A cereal grass ({Triticum vulgare}) and its grain, which
   furnishes a white flour for bread, and, next to rice, is the
   grain most largely used by the human race.
   [1913 Webster]

   Note: Of this grain the varieties are numerous, as red wheat,
         white wheat, bald wheat, bearded wheat, winter wheat,
         summer wheat, and the like. Wheat is not known to exist
         as a wild native plant, and all statements as to its
         origin are either incorrect or at best only guesses.
         [1913 Webster]

   {Buck wheat}. (Bot.) See {Buckwheat}.

   {German wheat}. (Bot.) See 2d {Spelt}.

   {Guinea wheat} (Bot.), a name for Indian corn.

   {Indian wheat}, or {Tartary wheat} (Bot.), a grain
      ({Fagopyrum Tartaricum}) much like buckwheat, but only
      half as large.

   {Turkey wheat} (Bot.), a name for Indian corn.

   {Wheat aphid}, or {Wheat aphis} (Zool.), any one of several
      species of {Aphis} and allied genera, which suck the sap
      of growing wheat.

   {Wheat beetle}. (Zool.)
   (a) A small, slender, rusty brown beetle ({Sylvanus
       Surinamensis}) whose larvae feed upon wheat, rice, and
       other grains.
   (b) A very small, reddish brown, oval beetle ({Anobium
       paniceum}) whose larvae eat the interior of grains of
       wheat.

   {Wheat duck} (Zool.), the American widgeon. [Western U. S.]
      

   {Wheat fly}. (Zool.) Same as {Wheat midge}, below.

   {Wheat grass} (Bot.), a kind of grass ({Agropyrum caninum})
      somewhat resembling wheat. It grows in the northern parts
      of Europe and America.

   {Wheat jointworm}. (Zool.) See {Jointworm}.

   {Wheat louse} (Zool.), any wheat aphid.

   {Wheat maggot} (Zool.), the larva of a wheat midge.

   {Wheat midge}. (Zool.)
   (a) A small two-winged fly ({Diplosis tritici}) which is very
       destructive to growing wheat, both in Europe and America.
       The female lays her eggs in the flowers of wheat, and the
       larvae suck the juice of the young kernels and when full
       grown change to pupae in the earth.
   (b) The Hessian fly. See under {Hessian}.

   {Wheat moth} (Zool.), any moth whose larvae devour the grains
      of wheat, chiefly after it is harvested; a grain moth. See
      {Angoumois Moth}, also {Grain moth}, under {Grain}.

   {Wheat thief} (Bot.), gromwell; -- so called because it is a
      troublesome weed in wheat fields. See {Gromwell}.

   {Wheat thrips} (Zool.), a small brown thrips ({Thrips
      cerealium}) which is very injurious to the grains of
      growing wheat.

   {Wheat weevil}. (Zool.)
   (a) The grain weevil.
   (b) The rice weevil when found in wheat.
       [1913 Webster]