Importance
In sweet corn, losses are as significant as hybrid varieties, but are only utilized on a periodic basis. The susceptible varieties cause losses ranging from 40-100% when infected prior to the 5-leaf stage. The losses are 15-35% and 3-15% for 7-leaf and 9-leaf stage respectively. Stewart's wilt may add additional costs for phytosanitary regulations from trading partners. Such regulations primarily affect seed commerce by preventing seed from being exported or by creating additional costs for phytosanitary inspections prior to export. During epidemics in the 1990s, Stewart's wilt was a significant economic issue for the corn seed industry because of the logistics of trading and exchange of large volumes of field corn seed throughout the world. Stewart's wilt also creates indirect costs for seed producers because resources must be used to screen germplasm and breed corn for Stewart's wilt resistance in order to develop hybrids that efficiently and effectively control the disease. In Kentucky, the disease causes huge losses for corn producers. Stewart's wilt impacts include stand reductions, production of fewer and smaller ears, and an increased susceptibility of wilt-infected plants to stalk rotting organisms.
Read more about this topic: Stewart's Wilt
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