An IPM program for managing fungal leaf blight diseases of carrot in New York

Beth Krueger Gugino, J. E. Carroll, T. L. Widmer, P. Chen, George S. Abawi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Fungal leaf blight diseases caused by Cercospora carotae and Alternaria dauci occur annually on processing carrot in New York, with growers applying up to eight fungicide sprays to manage these diseases. An integrated pest management (IPM) program involving the use of a 25% disease incidence threshold to prompt the first fungicide application and timing subsequent sprays by monitoring for increases in disease severity and weather forecasts in conjunction with a 10- to 14-day spray interval was evaluated in grower fields in 1997 and 1998. The IPM plots, compared with the grower plots, required two to six fewer fungicide applications but showed no yield reduction. From 1999 to 2004, the IPM program was validated and the effect of crop rotation and carrot cultivar susceptibility also were assessed. Carrot plants growing in fields with 2-year or longer crop rotation intervals reached the 25% disease incidence threshold later in the season and required fewer fungicide applications. The less-susceptible carrot cultivars also reached the 25% disease incidence threshold later, required fewer fungicide applications, and were less severely diseased than more susceptible cultivars. Validation of the IPM program in New York showed that both fungal leaf blights can be managed effectively using a 25% incidence threshold to prompt the first fungicide spray and making the subsequent fungicide applications based on increases in disease severity, weather forecasts, and a 10- to 14-day spray interval.

Original languageEnglish (US)
Pages (from-to)59-65
Number of pages7
JournalPlant disease
Volume91
Issue number1
DOIs
StatePublished - Jan 1 2007

Fingerprint

leaf blight
integrated pest management
carrots
pesticide application
disease incidence
growers
disease severity
fungicides
cultivars
Alternaria dauci
weather
Cercospora
incidence
monitoring
leaves

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Plant Science

Cite this

Gugino, Beth Krueger ; Carroll, J. E. ; Widmer, T. L. ; Chen, P. ; Abawi, George S. / An IPM program for managing fungal leaf blight diseases of carrot in New York. In: Plant disease. 2007 ; Vol. 91, No. 1. pp. 59-65.
@article{b8ba709e1693487d9c55718a3062e46c,
title = "An IPM program for managing fungal leaf blight diseases of carrot in New York",
abstract = "Fungal leaf blight diseases caused by Cercospora carotae and Alternaria dauci occur annually on processing carrot in New York, with growers applying up to eight fungicide sprays to manage these diseases. An integrated pest management (IPM) program involving the use of a 25{\%} disease incidence threshold to prompt the first fungicide application and timing subsequent sprays by monitoring for increases in disease severity and weather forecasts in conjunction with a 10- to 14-day spray interval was evaluated in grower fields in 1997 and 1998. The IPM plots, compared with the grower plots, required two to six fewer fungicide applications but showed no yield reduction. From 1999 to 2004, the IPM program was validated and the effect of crop rotation and carrot cultivar susceptibility also were assessed. Carrot plants growing in fields with 2-year or longer crop rotation intervals reached the 25{\%} disease incidence threshold later in the season and required fewer fungicide applications. The less-susceptible carrot cultivars also reached the 25{\%} disease incidence threshold later, required fewer fungicide applications, and were less severely diseased than more susceptible cultivars. Validation of the IPM program in New York showed that both fungal leaf blights can be managed effectively using a 25{\%} incidence threshold to prompt the first fungicide spray and making the subsequent fungicide applications based on increases in disease severity, weather forecasts, and a 10- to 14-day spray interval.",
author = "Gugino, {Beth Krueger} and Carroll, {J. E.} and Widmer, {T. L.} and P. Chen and Abawi, {George S.}",
year = "2007",
month = "1",
day = "1",
doi = "10.1094/PD-91-0059",
language = "English (US)",
volume = "91",
pages = "59--65",
journal = "Plant Disease",
issn = "0191-2917",
publisher = "American Phytopathological Society",
number = "1",

}

An IPM program for managing fungal leaf blight diseases of carrot in New York. / Gugino, Beth Krueger; Carroll, J. E.; Widmer, T. L.; Chen, P.; Abawi, George S.

In: Plant disease, Vol. 91, No. 1, 01.01.2007, p. 59-65.

Research output: Contribution to journalArticle

TY - JOUR

T1 - An IPM program for managing fungal leaf blight diseases of carrot in New York

AU - Gugino, Beth Krueger

AU - Carroll, J. E.

AU - Widmer, T. L.

AU - Chen, P.

AU - Abawi, George S.

PY - 2007/1/1

Y1 - 2007/1/1

N2 - Fungal leaf blight diseases caused by Cercospora carotae and Alternaria dauci occur annually on processing carrot in New York, with growers applying up to eight fungicide sprays to manage these diseases. An integrated pest management (IPM) program involving the use of a 25% disease incidence threshold to prompt the first fungicide application and timing subsequent sprays by monitoring for increases in disease severity and weather forecasts in conjunction with a 10- to 14-day spray interval was evaluated in grower fields in 1997 and 1998. The IPM plots, compared with the grower plots, required two to six fewer fungicide applications but showed no yield reduction. From 1999 to 2004, the IPM program was validated and the effect of crop rotation and carrot cultivar susceptibility also were assessed. Carrot plants growing in fields with 2-year or longer crop rotation intervals reached the 25% disease incidence threshold later in the season and required fewer fungicide applications. The less-susceptible carrot cultivars also reached the 25% disease incidence threshold later, required fewer fungicide applications, and were less severely diseased than more susceptible cultivars. Validation of the IPM program in New York showed that both fungal leaf blights can be managed effectively using a 25% incidence threshold to prompt the first fungicide spray and making the subsequent fungicide applications based on increases in disease severity, weather forecasts, and a 10- to 14-day spray interval.

AB - Fungal leaf blight diseases caused by Cercospora carotae and Alternaria dauci occur annually on processing carrot in New York, with growers applying up to eight fungicide sprays to manage these diseases. An integrated pest management (IPM) program involving the use of a 25% disease incidence threshold to prompt the first fungicide application and timing subsequent sprays by monitoring for increases in disease severity and weather forecasts in conjunction with a 10- to 14-day spray interval was evaluated in grower fields in 1997 and 1998. The IPM plots, compared with the grower plots, required two to six fewer fungicide applications but showed no yield reduction. From 1999 to 2004, the IPM program was validated and the effect of crop rotation and carrot cultivar susceptibility also were assessed. Carrot plants growing in fields with 2-year or longer crop rotation intervals reached the 25% disease incidence threshold later in the season and required fewer fungicide applications. The less-susceptible carrot cultivars also reached the 25% disease incidence threshold later, required fewer fungicide applications, and were less severely diseased than more susceptible cultivars. Validation of the IPM program in New York showed that both fungal leaf blights can be managed effectively using a 25% incidence threshold to prompt the first fungicide spray and making the subsequent fungicide applications based on increases in disease severity, weather forecasts, and a 10- to 14-day spray interval.

UR - http://www.scopus.com/inward/record.url?scp=33845885790&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33845885790&partnerID=8YFLogxK

U2 - 10.1094/PD-91-0059

DO - 10.1094/PD-91-0059

M3 - Article

VL - 91

SP - 59

EP - 65

JO - Plant Disease

JF - Plant Disease

SN - 0191-2917

IS - 1

ER -