Skip to main content
ARS Home » Southeast Area » Stoneville, Mississippi » Crop Genetics Research » Research » Publications at this Location » Publication #147884
Title: TARGETING SOIL SAMPLE COLLECTION OF MELOIDOGYNE INCOGNITA IN SOUTHERN MISSOURI SOYBEAN FIELDS FOR MANAGEMENT OF YIELD LOSSES

Author
item Donald, Patricia
item WRATHER, J - UMO-DELTA CENTER
item SHANNON, G - UMO-DELTA CENTER

Submitted to: Journal of Nematology
Publication Type: Abstract Only
Publication Acceptance Date: 6/1/2003
Publication Date: 11/1/2003
Citation: Donald, P.A., Wrather, J.A., Shannon, G. 2003. Targeting soil sample collection of Meloidogyne incognita in southern Missouri soybean fields for management of yield losses. Journal of Nematology. 35(3):334.

Interpretive Summary:

Technical Abstract: Meloidogyne incognita, root-knot nematode, suppresses yield in some soybean production fields in southeastern Missouri. Producers can minimize this yield suppression through wise selection of root-knot nematode management strategies based on the nematode population density in the field during the fall. Data on the best time during the fall for producers to collect soil samples has not existed. Our objective was to measure the M. incognita population density biweekly from beginning bloom to early-December at 10 locations in each of 2 soybean fields during 2001 and 2002. These data were used to predict the optimal time of soil sample collection for predictive management decisions for the next growing season. The number of juvenile plus male root-knot nematodes present in the soil peaked the first part of October in both years and the ratio of plant-parasitic nematodes to total nematodes was also highest at this time. Males were first observed in soil samples in August in both years. There was a secondary peak in numbers of vermiform root-knot nematodes in late November 2001 and early December 2002. Based on these results, southeast Missouri producers should sample fields in early-October to increase the likelihood of detecting root-knot nematodes if present in a soybean production field and to best measure risk of yield loss due to these nematodes.