Performance of Soybean Seed Treatments Against SDS and SCN
- In 2015, DuPont Pioneer researchers conducted on-farm trials evaluating the performance of soybean seed treatments across a broad range of environments including locations with sudden death syndrome (SDS), soybean cyst nematode (SCN), or early-season stress.
ILeVO® fungicide/nematicide seed treatment (active ingredient: fluopyram) provides protection of soybean seedlings from Fusarium virguliforme infection, the causal agent of sudden death syndrome. ILeVO fungicide seed treatment also has activity against SCN.
Locations: 193 on-farm trials
Plot Design: Two replications per treatment at each on-farm location.
FST + IST: Standard fungicide seed treatment (FST) + insecticide seed treatment (IST)*
FST + IST + ILeVO fungicide: FST + IST + ILeVO FST/NST (1.18 fl oz/140k unit)
*FST = EverGol® Energy fungicide + Allegiance® fungicide; IST = Gaucho® insecticide
Trial location near Utica, NE showing differences in SDS symptoms among seed treatments on an SDS-susceptible (left) and resistant (right) soybean variety. August 2015.
- On-farm research locations were characterized and results analyzed according to SDS and SCN pressure.
- SCN pressure groupings:
- High = SCN > 450 eggs/100 cc of soil
- Low = SCN < 450 eggs/100 cc of soil
- Soybeans treated with FST + IST + ILeVO fungicide produced significantly higher grain yield than FST + IST (4.9 bu/acre) in high SCN environments compared to 1.8 bu/acre in low SCN environments.
- In moderate SDS environments the addition of ILeVO fungicide increased grain yield 4.5 bu/acre over the FST + IST check.
Means within a group designated with the same letter do not significantly differ at α = 0.10
Authors: Keith O'Bryan and Meredith Burnison
2015 data are based on average of all comparisons made in 193 locations through October 2015. Do not use these or any other data from a limited number of trials as a significant factor in product selection.