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Amauromyza karli larva

Closeup of a small cream-colored fly larva emerging vertically with half its body exposed from a horizontal green plant stem.

A fully grown larva of Amauromyza karli emerges from quinoa stem. The larvae are cream white, lack heads and legs, and feed on pith inside stems using a hook. It has not yet been confirmed, but, based on the biology of other stem-boring flies in this family, it is likely that A. karli larvae chew an exit hole and leave the stem to pupate in the soil. (Photo courtesy of Ada Szczepaniec, Ph.D.)

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