Crop Rotation Effects on Population Densities of Ectoparasitic Nematodes

Authors

  • V. R. Ferris
  • R. L. Bernard

Abstract

The influence of rotation crop species on population densities of ectoparasitic nematode species common to soybean and corn fields of the North-Central region of the USA was studied for 5 years in 16 field blocks rotated to corn, soybeans, oats, wheat, and forage mixtures. Each block was sampled each year between mid-July and mid-August. High populations of Helicotylenchus pseudorobustus were maintained in all crops, especially corn. Tylenchorhynchus martini and Xiphinema americanum also developed with all crops, but a second year of corn depressed densities of both species. Paratylenchus projectus densities were high on soybeans and on forage consisting primarily of legumes. Key Words: Corn, Soybeans, Oats, Wheat, Forage, Helicotylenchus pseudorobustus, Tylenchorhynchus acutus, Tylenchorhynchus martini, Xiphinema americanum, Paratylenchus projectus.

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Published

1971-04-15

Issue

Section

Articles