Soybean Cyst Nematode Reproduction in the North Central United States

Authors

J. Wang, University of Missouri
P. A. Donald, University of Missouri
T. L. Niblack, University of MissouriFollow
G. W. Bird, Michigan State University
J. Faghihi, Purdue University
J. M. Ferris, Purdue University
C. Grau, University of Wisconsin
D. J. Jardine, Kansas State University
P. E. Lipps, Ohio State University
A. E. MacGuidwin, University of Wisconsin
H. Melakeberhan, Michigan State University
G. R. Noel, USDA ARS
P. Pierson, Ohio State University
P. M. Riedel, Ohio State University
P. R. Sellers, Purdue University
W. C. Stienstra, University of Minnesota
T. C. Todd, Kansas State University
G. L. Tylka, Iowa State University
T. A. Wheeler, Ohio State University
D. S. Wysong, University of Nebraska-Lincoln

Date of this Version

1-2000

Citation

Wang, J., Donald, P. A., Niblack, T. L., Bird, G. W., Faghihi, J., Ferris, J. M., Grau, C., Jardine, D. J., Lipps, P. E., MacGuidwin, A. E., Melakeberhan, H., Noel, G. R., Pierson, P., Riedel, R. M., Sellers, P. R., Stienstra, W. C., Todd, T. C., Tylka, G. L., Wheeler, T. A., and Wysong, D. S. 2000. Soybean cyst nematode reproduction in the north central United States. Plant Dis. 84:77-82.

Comments

U. S. government work.

Abstract

An experiment was conducted in Heterodera glycines–infested fields in 40 north central U.S. environments (21 sites in 1994 and 19 sites in 1995) to assess reproduction of this nematode. Two resistant and two susceptible soybean cultivars from each of the maturity groups (MG) I through IV were grown at each site in 6.1 m by 4 row plots. Soil samples were collected from each plot at planting and harvest and processed at Iowa State University to determine H. glycines initial (Pi) and final (Pf) population densities as eggs per 100 cm3 of soil. Overall, reproduction (Pf/Pi) of H. glycines on susceptible cultivars in all MG was similar. Reproduction was higher on MG III and IV susceptible cultivars than on those in MG I and II. Resistant MG I and II cultivars reduced nematode population densities more consistently than those in MG III and IV. Reproduction of the nematode was similar among sites within the same maturity zone (MZ), defined as the areas of best adaptation of the corresponding MG. Nonetheless, careful monitoring of nematode population densities is necessary to assess changes that occur over time in individual fields.