VERTICAL DISTRIBUTION OF 3 NEMATODE SPECIES IN RELATION TO CERTAIN SOIL PROPERTIES

  • 1 January 1976
    • journal article
    • research article
    • Vol. 8  (3) , 243-247
Abstract
Population densities of Belonolaimus longicaudatus, Pratylenchus brachyurus and Trichodorus christiei were determined from soil samples taken weekly in Tifton, Georgia [USA] during a 14-mo. period (except for April and May) at 15-cm increments to a depth of 105 cm. B. longicaudatus predominated in the top 30 cm of soil that was 87-88% sand, 6-7% silt and 5-7% clay. No specimens were found below 60 cm where the soil was 76-79% sand, 5-6% silt and 15-19% clay. Highest population densities occurred during June-Sept. when temperature in the top 30 cm of soil was 22-25.degree. C and soil moisture was from 9-20% by volume. P. brachyurus was found at all depths, but population densities were greatest 45-75 cm deep where the soil was 78-79% sand, 6% silt and 15-16% clay. Highest population densities occurred during March, June and Dec. when the soil temperature 45-75 cm deep was 14-17.degree. C and soil moisture was 22-42%. T. christiei was found at all depths, but population densities were highest 30 cm deep where the soil was 83% sand, 5% silt and 12% clay. Highest population densities occurred during Dec. through March when the soil temperature 30 cm deep was 11-17.degree. C and soil moisture was 18-23%.

This publication has 1 reference indexed in Scilit: