Oviposition Preference of Meromyza americana Fitch for Different Small Grain Varieties under Greenhouse Conditions1

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Abstract
The wheat stem maggot, Meromyza americana Fitch (Diptera; Chloropidae) is a well known and widely distributed insect pest of North America which injures wheat, barley, rye and grasses. Gilberston (1925) gave a good description of the life history and the injury produced. He as well as Dunham (1934) reported evidence of resistance in wheat varieties to injury from the wheat stem maggot. Allen & Painter (1937) reviewed the literature up to that date, consisting mainly from short notes in annual reports and technical papers which dealt with the life history, parasites and food plants. Furthermore, they reported the results of an extensive study on differential infestation of wheat varieties. The relation of stage of plant maturity to the number of blasted heads was found to be an important characteristic for several wheat varieties. The studies reported in this paper were mainly directed toward bringing together more evidence on the behavior of the fly on wheat varieties before and during oviposition.

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