Nematodes found in New York state fields with several different cropping histories

Summary

A comparison was made of the kinds and numbers of nematodes present in several fields where potatoes had been grown continuously for many years, and other areas, some of which were of the same soil type, where potatoes had not been grown. Nematodes were removed from the soil by screening instead of by the use of the Baermann funnel because the Baermann funnel was found to be inefficient for the recovery of plant parasites. A more extended survey would be needed to determine conclusively the effects of continuous cropping with potatoes on populations of plant parasitic nematodes. The only plant parasitic nematodes present in large quantity in any of the fields surveyed were two undescribed species ofPratylenchus.