Effect of rotation crops on Heterodera glycines population density in a greenhouse screening study

S. A. Warnke, S. Y. Chen, Donald L Wyse, G. A. Johnson, Paul M Porter

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Crop rotation is a common means of reducing pathogen populations in soil. Several rotation crops have been shown to reduce soybean cyst nematode (Heterodera glycines) populations, but a comprehensive study of the optimal crops is needed. A greenhouse study was conducted to determine the effect of growth and decomposition of 46 crops on population density of H. glycines. Crops were sown in soil infested with H. glycines. Plants were maintained until 75 days after planting, when the soil was mixed, a sample of the soil removed to determine egg density, and shoots and roots chopped and mixed into the soil. After 56 days, soil samples were again taken for egg counts, and a susceptible soybean ('Sturdy') was planted in the soil as a bioassay to determine egg viability. Sunn hemp (Crotalaria juncea), forage pea (Pisum sativum), lab-lab bean (Lablab purpureus), Illinois bundleflower (Desmanthus illinoensis), and alfalfa (Medicago sativa) generally resulted in smaller egg population density in soil or number of cysts formed on soybean in the bioassay than the fallow control. Sunn hemp most consistently showed the lowest numbers of eggs and cysts. As a group, legumes resulted in lower egg population densities than monocots, Brassica species, and other dicots.

Original languageEnglish (US)
Pages (from-to)391-398
Number of pages8
JournalJournal of Nematology
Volume38
Issue number3
StatePublished - Sep 1 2006

Keywords

  • Brassica
  • Crop rotation
  • Crotalaria juncea
  • Desmanthus illinoensis
  • Glycine max
  • Heterodera glycines
  • Lablab purpureus
  • Management
  • Medicago sativum
  • Pisum sativum
  • Population
  • Soybean cyst nematode

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