Nathan Kleczewski, Extension Specialist – Plant Pathology; firstname.lastname@example.org
Late blight is a disease that we deal with to some extent in the mid-Atlantic each year and there have been some recent reports in the area (MD, NJ) over the last few days. When reports come in you may see something mentioned about the lineage that was detected. US 23? Isn’t that a highway?
Each lineage has unique genetic characteristics that may impact management practices and also level of concern in the region. Some lineages prefer to cause disease on potatoes, some tomatoes, and some both. In addition, some are sensitive, intermediate, or insensitive to mefanoxam fungicides. As a quick reference, you can view the recent lineages reported in the United States at the USAblight website http://www.usablight.org/node/52. I have simplified the information for you below.
|Genotype||Host||Sensitivity to mefenoxam|