Update on Stewart's Bacterial Wilt

June 16, 2000
Stewart's wilt is starting to make itself known in the northwestern part of the state now. Dave Feltes, IPM educator in the Quad Cities, reports a heavy Stewart's infection on seedling corn V-5 to V-6 growth stage in Joy, Illinois. The plants had characteristic leaf striping and brown rotted growing points. See issue no. 3, no. 7, and no. 8 of this year's Bulletin for more information on Stewart's wilt and lookalikes. There are a number of other factors that can cause these types of symptoms. A definitive diagnosis of Stewart's wilt is made in the lab, where we look for microscopic "bacterial streaming" from the infected tissue.--Suzanne Bissonnette

Author: Suzanne Bissonnette