A new publication by Baggio et al. (2022) out of the University of Florida provides evidence that 1,3-dichloropropene (1,3-D) alone and in mixture with chloropicrin were more effective in reducing inoculum of Macrophomina phaseolina than chloropicrin alone.
We generally think of 1,3-D (known under the trade name TELONETM) as an effective nematicide with minor efficacy against soilborne fungi. In contrast, chloropicrin is known for its high efficacy against soilborne fungi. Chloropicrin is often applied in combination with 1,3-D, so the realization that both fumigants are active against Macrophomina provides an encouraging piece of information in our fight against Macrophomina root rot, also known as “charcoal rot.”
Baggio, S. J., Cordova, L. G., Toledo, B. F., Noling, J. W. and Peres, N. A. 2022. A reassessment of the fungicidal efficacy of 1,3-dichloropropene, chloropicrin, and metam potassium against Macrophomina phaseolina in strawberry. Pest Management Science. May 11. https://doi.org/10.1002/ps.6982