Database Research Summaries2018 Soybean SDS management: detection, fungicides and resistance
Research Focus
The focus of this project is to examine seed treatments and their role of managing SDS and SCN.
Objectives
- Assess new seed treatments for SDS and SCN management.
- Determine soybean susceptibility factors that are specifically targeted by F. virguliforme toxins.
- Develop methods to rapidly phenotype soybean germplasm for resistance to SDS through real-time quantitative PCR and aerial imaging and image analysis.
- Assist soybean breeders in evaluating breeding material.
- Educate growers and CCA’s on biology and management of SDS.
- Determine the pathogenicity and virulence of Fusarium brasiliense isolates from Michigan.
- Train a PhD level graduate student
Results
- The early planting date increased yields on average 3.1 to 4.8 Bu/ac. The earlier planting dates resulted in reaching 75% emergence 10 to 19 days sooner than the late planting date. The V1 growth stage was reached 7 to 16 days sooner than the late planting. The sooner V1 is reached the more opportunity for a higher total number of nodes on a plant. The early planting dates increased canopy closure 4.6 to 15 days sooner than the late planting dates.
- A study was published integrating all of the reported SDS resistance loci and markers that are available, and proposed a unifying naming structure. This effort should help public and private breeders integrate SDS resistance genes into soybean lines.
- A second species of SDS has been identified, causing fungus (Fusarium brasiliense) present in Michigan; this is the first report for the United States. Curiously we have routinely found this F. brasiliense in recent dry bean root rot surveys, perhaps indicating that it has a preference for dry beans. We screened F. brasiliense with the ILeVO seed treatment, it appeared to have similar efficacy as it does against F. virguliforme, field trials will be necessary to confirm this.
- We have worked with the University of Wisconsin-Madison in the testing of samples for F. virguliforme to assist them in developing a leaf canopy detection of SDS. We have also collected additional UAV (drone) images of our Decatur screening location to build an image library for development of analysis tools.
Importance
- This is a third party assessment of seed treatment and in-furrow and foliar fungicides for SDS and SCN management.
- Improved soybean germplasm and variety resistance to SDS.
- A new to tool to determine at risk fields for SDS development is currently in progress.
- There will be a greater understanding of farmers CCA’s in awareness and management of SDS to reduce yield losses.
For more information about this research project, please visit the National Soybean Checkoff Research Database.
Funded in part by the soybean checkoff.
