Relationships Between Reactions of Sweet Corn Hybrids to Stewart's Wilt and Incidence of Systemic Infection by Erwinia stewartii

Plant Disease
P M MichenerJ K Pataky

Abstract

Relationships between the reactions of sweet corn hybrids to Stewart's wilt and the incidence of natural, systemic infection by Erwinia stewartii differed among trials in which the prevalence of Stewart's wilt differed. Systemic Stewart's wilt infection was assessed for 262, 296, and 245 hybrids planted in seven trials in central Illinois in June and July 1998, 1999, and 2000, respectively. Incidence of systemic infection was calculated in each trial for all hybrids in each of nine categories of Stewart's wilt reactions (i.e., 1 = resistant and 9 = susceptible). When mean incidence was about 5%, incidence ranged from about 1 to 8% on resistant to moderately susceptible hybrids, but incidence was nearly 30% on susceptible hybrids. When mean incidence ranged from 10 to 16%, the relationships between hybrid reactions and incidence were explained by exponential or polynomial regressions. Incidence was less than 10% for hybrids with resistant and moderately resistant reactions, and incidence was greater than 15% for moderately susceptible to susceptible hybrids. When mean incidence was near 50%, the relationship was linear. Incidence was about 18% for resistant hybrids and about 80% for susceptible hybrids. Incidence increased about...Continue Reading

References

Oct 1, 2000·Plant Disease·J K PatakyR H Teyker

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Citations

Jul 6, 2018·EFSA Journal·UNKNOWN EFSA Panel on Plant Health (EFSA PLH Panel)David Caffier
Sep 13, 2008·Molecular Plant-microbe Interactions : MPMI·Carmen M HerreraSusanne B von Bodman

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