Skip to main content
APS Plant Health 2025 Main banner
Icon Legend
This session is not in your schedule.
This session is in your schedule. Click again to remove it.
ViewAttendees 1

POSTERS: Nematology I

P-437 - Evaluation of commercial soybean varieties for soybean cyst nematode reproduction potential in the North Dakota Red River Valley

Monday, August 4, 2025
4:30 PM - 5:15 PM HST
Location: Exhibit Hall 3

    Presenting Author(s)

  • HR

    Hope Renfroe-Becton (she/her/hers)

    Research Assistant Professor
    North Dakota State University
    Fargo, North Dakota, United States

    • Author(s)

  • GK

    Gustavo Kreutz

    Assistant Soybean Breeder
    NDSU
    Fargo, North Dakota, United States

  • AC

    Ana Carcedo

    Broadleaf Agronomist
    NDSU
    Fargo, North Dakota, United States

  • CM

    Carrie Miranda

    Assistant Professor
    North Dakota State University
    Fargo, North Dakota, United States

  • GY

    Guiping Yan

    Associate Professor
    North Dakota State University
    Fargo, North Dakota, United States

  • RW

    Richard Wade Webster, n/a

    Assistant Professor and Extension Soybean Pathologist
    North Dakota State University
    Fargo, North Dakota, United States

Abstract Text:

Soybean cyst nematodes (SCN) are destructive soil-borne pathogens reducing North Dakota soybean growers’ yields by up to $85 million USD annually. The use of varieties from SCN resistant sources, PI88788 or Peking, is recommended for decreasing SCN populations and minimizing yield losses. The objective of this study is to screen commercial soybean varieties for their effectiveness in reducing SCN populations in the Red River Valley, where the greatest concentration of soybean production is in North Dakota. This study was conducted in 2024 at two locations selected due to a history of high SCN pressure. Ten soybean varieties were selected: P04A98E (susceptible), DSR-0481E (88788), PFS-2405 (88788), P06A85E (88788), AG07XF4 (88788), PFS-2309 (Peking), P07T59E (Peking), P02A78E (Peking), DSR-0585E (Peking), and A09E33 (Peking). Plots were arranged in RCBD with 4 repetitions per treatment. Soil samples were taken at planting and harvest for SCN identification and quantification; reproductive factor (RF) was calculated by dividing at-harvest by at-plant egg counts. Significant differences were observed among varieties for SCN RF (P=0.003) with P04A98E having greater RF (RF=8.4) compared to all other lines except for PFS-2309 (RF=4.7). Mean RF < 1 for DSR-0585E, P07T59E, P02A78E, and A09E33 suggests that these commercial lines may be effective in reducing populations in Red River Valley fields with high SCN pressure (HG-type = 2.5.7; both locations). After repeating this study in 2025 and 2026, recommendations regarding variety selection for SCN management will be updated.