Soybean Cyst Nematode Reproduction in the North Central United States

Wang, J.; Niblack, P. A.; Tylka, Gregory; 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.; Wysong, D. S.

Soybean Cyst Nematode Reproduction in the North Central United States

File

2000_Tylka_SoybeanCyst.pdf (46.98 KB)

Date

2000-01-01

Authors

Wang, J.

Niblack, P. A.

Tylka, Gregory

Bird, G. W.

Faghihi, J.

Ferris, J. M.

Grau, C.

Jardine, D. J.

Lipps, P. E.

MacGuidwin, A. E.

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Authors

Person

Tylka, Gregory

Morrill Professor

Organizational Units

Organizational Unit

Plant Pathology and Microbiology

The Department of Plant Pathology and Microbiology and the Department of Entomology officially merged as of September 1, 2022. The new department is known as the Department of Plant Pathology, Entomology, and Microbiology (PPEM). The overall mission of the Department is to benefit society through research, teaching, and extension activities that improve pest management and prevent disease. Collectively, the Department consists of about 100 faculty, staff, and students who are engaged in research, teaching, and extension activities that are central to the mission of the College of Agriculture and Life Sciences. The Department possesses state-of-the-art research and teaching facilities in the Advanced Research and Teaching Building and in Science II. In addition, research and extension activities are performed off-campus at the Field Extension Education Laboratory, the Horticulture Station, the Agriculture Engineering/Agronomy Farm, and several Research and Demonstration Farms located around the state. Furthermore, the Department houses the Plant and Insect Diagnostic Clinic, the Iowa Soybean Research Center, the Insect Zoo, and BugGuide. Several USDA-ARS scientists are also affiliated with the Department.

Department

Plant Pathology and Microbiology

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.

Comments

This article is published as Wang, J., P. A. Donald, T. L. Niblack, G. W. Bird, J. Faghihi, J. M. Ferris, C. Grau et al. "Soybean cyst nematode reproduction in the north central United States." Plant Disease 84, no. 1 (2000): 77-82, doi: 10.1094/PDIS.2000.84.1.77.