Crop & Pest Report
Very Little Dry Bean Rust Found (8/25/11)
Dry bean rust was identified in the growing region in the last two weeks. It has been suspected or confirmed in Traill, Grand Forks, and Walsh counties. It is being found on new varieties that have the Ur-3 gene, so it is the new race (or a variant of it) that was first identified in 2008.
Dry beans are maturing quickly,
and it is becoming unlikely that a fungicide application would be beneficial if
rust is found in your field. Once pintos
are striping fungicides are NOT recommended.
Preventative applications are NOT recommended.
There is surprisingly little rust being found. Fungicides were used heavily for white mold this year, and even though they may not be the best rust products (there are exceptions) they will knock down rust and likely served as a good preventative application. The use of those products likely delayed the onset of rust this year, and may have reduced the potential severity region-wide.
Sam Markell - Extension Plant Pathologist
NDSU Crop & Pest Report - May 24, 2012
