Abstract
The wheat midge, Sitodiplosis mosellana (Gehin), was found in wheat heads and widely distributed in Michigan in 1981. The midge larvae were found in greater numbers in heads infected with glume blotch, Septoria nodorum (Berk.) Berk. This is the first reported association of this insect with a fungus, although other cecidomyiids in closely related genera feed on fungi. We describe a technique to sample the number of larvae that have completed their feeding in wheat heads. Larvae in their last in star can live in their penultimate-in star skins under dry conditions for 10 months, and other larvae removed from their skins can live as long as 10 months submerged under water. In addition, pupation may occur under water, with some of the pupae floating to the surface. All of these unusual behavioral traits enable the midge to be very adaptable.
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