Update:
In the last 6 months (1 October 2023 through 31 March 2024) we:
- compiled and prepared a publication titled “Soybean cyst nematode-resistant soybean varieties for Iowa,” posted online in November 2023 - see https://doi.org/10.37578/ONKA5947; a PDF file of the publication is attached here also.
- harvested plots in all 9 SCN-resistant variety trial experiments and 27 seed treatment evaluation experiments to determine yields in October 2023
- collected soil samples from every plot the variety trial and seed treatment experiments at the time of harvest to determine final SCN soil population densities in October 2023
- extracted SCN cysts, then eggs, from 3,240 soil samples collected from the SCN-resistant variety trial and seed treatment experiments at harvest, then counted the eggs to determine final SCN egg population densities from November 2023 through March 2024
- compiled and analyzed yield and SCN population density data from the SCN-resistant variety trial and seed treatment experiments in December 2023
- prepared a printed report of the SCN-resistant soybean variety evaluation experiment results, printed the report, and then had the report distributed to 48,000 Iowans as a special insert in the January 12, 2024, issue of the Iowa Farmer Today newspaper - the report is available online - see https://doi.org/10.37578/UDSP9793 and a PDF file of the publication is attached here also.
- published two articles in the ISU Integrated Crop Management Newsletter about the resistant variety list and the variety trial results:
• Tylka, G. 2023. Fall is Prime Time to Sample Fields for SCN. Iowa State University Integrated Crop Management News (6 October 2023). https://crops.extension.iastate.edu/cropnews/2023/11/fall-prime-time-sample-fields-scn
• Tylka, G. 2023. New Data-Based Calculator Estimates Economic Yield Loss from SCN in Individual Fields. Iowa State University Integrated Crop Management News (10 November 2023). https://crops.extension.iastate.edu/cropnews/2023/11/new-data-based-calculator-estimates-economic-yield-loss-scn-individual-fields
• Tylka, G. 2023. Updated SCN-resistant Soybean Variety List Has More with Peking Resistance than Ever. (20 November 2023) https://crops.extension.iastate.edu/cropnews/2023/11/updated-scn-resistant-soybean-variety-list-has-more-peking-resistance-ever
• Tylka, G. 2023. Quick Guide to Soybean Varieties for Iowa with Peking SCN Resistance. (28 November 2023) https://crops.extension.iastate.edu/cropnews/2023/11/quick-guide-soybean-varieties-iowa-peking-scn-resistance
- began contacting seed companies to request seeds of SCN-resistant soybean varieties for 2024 field experiments in January-February 2024
- contacted BASF, FMC, and Syngenta personnel for seeds treated with Ilevo, Avodigen, and Saltro, respectively, for 2024 small-plot field experiments
- began receiving seed from seed and seed-treatment companies for 2024 field experiments, and designed the 2024 field experiments and began packaging of seeds for the various experiments in March 2024
- received 88 Peking varieties to include in variety evaluation experiments in 2024, which is up from 62 such varieties in 2023
- conducted final soil sampling of farmer fields throughout Iowa to allow for selection of the 2024 experimental field locations in March 2024
View uploaded report
View uploaded report 2