Studies on sweet corn: Stewart's wilt forecasting, the effect of maize dwarf mosaic on foliar diseases, and herbicide sensitivity
type: CreativeWork
description: Diseases and sensitivity to P450-metabolized herbicides can limit the production of high quality sweet corn. Separate studies were done to determine the probability of exceeding 1% and 5% incidence of Stewart’s wilt on sweet corn with different reactions to Pantoea stewartii, the effect of maize dwarf mosaic (MDM) on eight foliar diseases, and the effect of hybrid CYP genotype on sweet corn yield following postemergence applications of mesotrione or nicosulfuron. Stewart’s disease can be forecasted using the Stevens, Stevens-Boewe, or Iowa State forecasts. These forecasts assume a high degree of host susceptibility. Host resistance affects the incidence and severity of disease, and therefore can affect the accuracy forecasts of Stewart’s disease. Levels of host resistance affected the incidence of systemic seedling wilt within ranges of winter temperatures used by each of the forecasts. Frequency distributions of Stewart’s wilt incidence on moderate and resistant hybrids did not differ among the three temperature ranges above -2.8ºC (27ºF). Conversely, distributions of Stewart’s wilt incidence on susceptible hybrids differed among each of the four ranges of winter temperature from the Stevens-Boewe forecast (i.e., >0.6ºC, -1.1º to 0.6ºC, -2.8º to -1.1ºC, and <-2.8ºC). The probability of exceeding the 1% and 5% incidence thresholds that warrant the use of seed treatment insecticides also differed among hybrids with susceptible, moderate, or resistant reactions to Stewart’s wilt. The probability of exceeding 1% incidence of systemic Stewart’s wilt was greater than 0.5 on moderately susceptible to susceptible sweet corn hybrids when mean winter temperature was above -2.8ºC (27ºF). When mean winter temperature was below -2.8ºC (27ºF), using a seed treatment insecticide on moderate and resistant hybrids for Stewart’s wilt control was not economical because the probability of exceeding 1% incidence of systemic Stewart’s wilt was about 0.04. The probability of exceeding 5%…
abstract: Diseases and sensitivity to P450-metabolized herbicides can limit the production of high quality sweet corn. Separate studies were done to determine the probability of exceeding 1% and 5% incidence of Stewart’s wilt on sweet corn with different reactions to Pantoea stewartii, the effect of maize dwarf mosaic (MDM) on eight foliar diseases, and the effect of hybrid CYP genotype on sweet corn yield following postemergence applications of mesotrione or nicosulfuron. Stewart’s disease can be forecasted using the Stevens, Stevens-Boewe, or Iowa State forecasts. These forecasts assume a high degree of host susceptibility. Host resistance affects the incidence and severity of disease, and therefore can affect the accuracy forecasts of Stewart’s disease. Levels of host resistance affected the incidence of systemic seedling wilt within ranges of winter temperatures used by each of the forecasts. Frequency distributions of Stewart’s wilt incidence on moderate and resistant hybrids did not differ among the three temperature ranges above -2.8ºC (27ºF). Conversely, distributions of Stewart’s wilt incidence on susceptible hybrids differed among each of the four ranges of winter temperature from the Stevens-Boewe forecast (i.e., >0.6ºC, -1.1º to 0.6ºC, -2.8º to -1.1ºC, and <-2.8ºC). The probability of exceeding the 1% and 5% incidence thresholds that warrant the use of seed treatment insecticides also differed among hybrids with susceptible, moderate, or resistant reactions to Stewart’s wilt. The probability of exceeding 1% incidence of systemic Stewart’s wilt was greater than 0.5 on moderately susceptible to susceptible sweet corn hybrids when mean winter temperature was above -2.8ºC (27ºF). When mean winter temperature was below -2.8ºC (27ºF), using a seed treatment insecticide on moderate and resistant hybrids for Stewart’s wilt control was not economical because the probability of exceeding 1% incidence of systemic Stewart’s wilt was about 0.04. The probability of exceeding 5%…
author: Meyer, Michael D.
language: en
keywords: Sweet corn, Zea mays, corn diseases, Maize dwarf mosaic, Stewart's wilt, herbicide sensitivity, yield, cytochrome P450 (CYP), CYP genes
date published: 2010-05-18T18:56:09Z
date modified: 2026-07-22T22:25:08Z
provider: University of Illinois - Urbana-Champaign
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Illinois at Urbana-Champaign

PropertyValue
property ID: Handle
value: http://hdl.handle.net/2142/16014