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This article in AJ

  1. Vol. 77 No. 2, p. 249-253
     
    Received: May 24, 1984


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doi:10.2134/agronj1985.00021962007700020017x

Performance of Selected Soybean Cultivars in a Field Infested with Mixtures of Root-Knot, Soybean Cyst, and Other Phytonematodes1

  1. D. B. Weaver,
  2. R. Rodriguez-Kabana and
  3. D. G. Robertson2

Abstract

Abstract

Information on relative nematode resistance in soybean cultivars is needed because of recent Environmental Protection Agency action prohibiting the use of ethylene dibromide as a soil fumigant for nematode control. Performance of 10 soybean [Glycine max (L.) Merr.] cultivars was studied near Elberta, AL for 2 years in a Eustis loamy fine sand (sandy, siliceous, thermic, Psammentic Paleudults) that was heavily infested with Southern root-knot nematode [Meloidogyne incognita (Kofoid and White) Chitwood] and lightly infested with race 3 of the soybean cyst nematode (Heterodera glycines Ichinohe). The objective was to determine relative resistance to nematodes among cultivars by measuring yield and nematode numbers in unfumigated plots and in plots fumigated with 18.7 L ha−1 ethylene dibromide. Seed yields of all cultivars were increased an average of 396% in 1982, and 138% in 1983 by fumigation. ‘Foster’ and ‘Kirby’ had the highest seed yields in unfumigated soil. All cultivars sustained significant nematode larval populations near harvest with greater numbers associated with the higher yielding cultivars. Foster and Kirby offer a practical approach to management of heteroderid nematodes in the absence of an economical, efficient nematicide.

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