Prevalent in Idaho and the Pacific Northwest, white mold develops in areas with dense canopy growth and moist conditions. Lesions begin to form between the stem and branches, 2 to 3 weeks after row closure, and white cottony growth spreads. Foliage wilt, bacterial stem rot and plant death result from white mold.
Crop rotation with nonhosts, managing canopy growth and density, and proper irrigation reduce the risk of white mold affecting potato crops.
Omega® fungicide is an additional tool for white mold management in potato crops. The fungicide is a flexible option for growers that offers a multi-site mode of action to attack pathogens, low use rates, various application methods and quick rainfastness.
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