Late Season Stratego Fungicide Application

INTRODUCTION

Fungicides can be effective in controlling fungal diseases in soybeans. However, response to fungicide application is most likely when there is significant disease pressure. There is a need to test different fungicides in order to recommend to producers the likelihood of obtaining a profitable return on fungicide investment in soybeans. The objective of this research in eastern South Dakota is to determine the efficacy of foliar fungicides (Stratego) in controlling soybean fungal diseases.

MATERIALS AND METHODS

Treatments listed in Table 1 are applied as below. Each location had untreated check plots (no fungicide applied) versus plots treated with fungicide (Stratego). Stratego’s active ingredients are Propiconazole, 11.4% (CAS No. 60207-90-1) and Trifloxystrobin, 11.4% (CAS No. 141517-21-7). It is important to note – soybean disease pressure was very low to non-existent at each location.

RESULTS AND DISCUSSION

No significant grain yield differences were found when fungicides were applied (Table 2). There was about a 1.5 bushels difference between the fungicide treated plots and untreated check plots which was not significantly different (Pr>F = 0.789).

SUMMARY

Disease pressure was very low to non-existent at each location. Fungicide results indicated there were no significant grain yield differences when fungicides were applied.

Modified From: https://www.sdstate.edu/sites/default/files/2015%20SERF%20AR_Final%20Web.pdf

By: Connie Strunk

ACKNOWLEDGMENT

Funding for this research project was provided by the South Dakota Soybean Research and Promotion Council, SDSU Extension, SD Agriculture Experiment Station and the Northeast Research Farm near South Shore SD. The authors would also like to thank the soybean producers who participated in this project.

Stratego is a registered trademark of the Bayer Crop Science Company