Field evaluation of carrot cultivars for susceptibility to fungal leaf blight diseases in New York

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

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Carrot cultivars grown in New York were evaluated for susceptibility to the fungal leaf blight pathogens Alternaria dauci (1999) and Cercospora carotae (2000-03) in an experimental field under continuous carrot cultivation since 1996. Replicated plots were established in a randomized complete block design. Plants were rated for disease incidence and severity at regular intervals. Cultivar susceptibility was ranked based on the area under the disease progress curve. An IPM program for carrot leaf blights conducted in growers' fields provided the opportunity to determine the impact susceptibility had on the date the 25% disease incidence threshold was reached to prompt the first fungicide application. Of the cultivars evaluated, Bolero, Carson, Calgary, Ithaca, and Fullback were less susceptible to A. dauci whereas, Bolero, Carson, and Bergen were less susceptible to C. carotae. Fontana was most susceptible to both fungal leaf blight pathogens. In grower fields less susceptible cultivars reached the 25% threshold later than their more susceptible counterparts. Carrot cultivar susceptibility was incorporated into an IPM program for these diseases.

Original languageEnglish (US)
Pages (from-to)709-714
Number of pages6
JournalCrop Protection
Volume26
Issue number5
DOIs
StatePublished - May 1 2007

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leaf blight
carrots
cultivars
Alternaria dauci
disease incidence
growers
Cercospora
pathogens
disease severity
pesticide application
leaves

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science

Cite this

Gugino, Beth Krueger ; Carroll, J. E. ; Widmer, T. L. ; Chen, P. ; Abawi, G. S. / Field evaluation of carrot cultivars for susceptibility to fungal leaf blight diseases in New York. In: Crop Protection. 2007 ; Vol. 26, No. 5. pp. 709-714.
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Field evaluation of carrot cultivars for susceptibility to fungal leaf blight diseases in New York. / Gugino, Beth Krueger; Carroll, J. E.; Widmer, T. L.; Chen, P.; Abawi, G. S.

In: Crop Protection, Vol. 26, No. 5, 01.05.2007, p. 709-714.

Research output: Contribution to journalArticle

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