Soybean Nodule Fly

John Van Duyn, North Carolina State University, Entomology Extension Specialist

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Soybean nodule fly: The nodule fly is seldom noticed by growers. Adults are small clear winged flies (less than 1/4 inch long) with a rust red abdomen, and the larvae are small (3/8 inch long) white maggots that live in the soil. Larvae feed on and destroy the nitrogen fixing nodules of the soybean plant; damaged nodules appear hollowed-out. Although the soybean nodule fly is a common insect, it is not considered to be a significant pest. In potted plant studies, nodule damage by chewing insects has shown stimulated root growth and branching, as well as reduced seed yield. Presumably, high populations of nodule fly maggots could reduce yield, especially under high yield conditions where the plant's demand for nitrogen was great. Severe infestations may produce nitrogen deficiency symptoms. There are no management strategies for soybean nodule fly.

Soybean Page

Other Resources

  1. North Carolina Agricultural Chemicals Manual
  2. North Carolina Cooperative Extension Service

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This page ( was created by John W. Van Duyn Ph D. Extension Entomologist, Wayne Modlin, Res. Tech. III.

Date Created 2/22/00.
Last revised on 2/04/04.

Published by North Carolina Cooperative Extension Service

Distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914. Employment and program opportunities are offered to all people regardless of race, color, national origin, sex, age, or disability. North Carolina State University at Raleigh, North Carolina A&T State University, U.S. Department of Agriculture, and local governments cooperating.

CAUTION: The information and recommendations in these Notes were developed for North Carolina conditions and may not apply elsewhere.