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    • Overview
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    • Organic management of vegetable diseases
    • Basil downy mildew
    • Tomato late blight
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Cornell College of Agriculture and Life SciencesCornell University
Vegetable Pathology – Long Island Horticultural Research & Extension Center
  • Home
  • About
  • Photo Gallery
    • Arugula
    • Asparagus
    • Basil
    • Beans
    • Beets and Swiss chard
    • Blueberry
    • Carrots
    • Celery
    • Corn (sweet)
    • Crucifers (aka brassicas and cole crops)
    • Cucurbits
    • Dill
    • Eggplant
    • Garlic
    • Horseradish
    • Lettuce
    • Onion
    • Parsley
    • Peas
    • Peppers
    • Potatoes
    • Spinach
    • Strawberries
    • Tomatoes
  • Research
    • Research reports
    • Organic Disease Management
    • Biopesticide Evaluations
    • Fungicide Resistance
    • Cucurbit Downy Mildew
    • Cucurbit Powdery Mildew
    • Cucurbit Bacterial Wilt
    • Phytophthora Blight
    • Basil Downy Mildew
    • Late Blight of Tomato
    • Foliar Diseases of Tomato
    • Pepper Bacterial Leaf Spot
    • Spinach White Rust
    • Biofumigation
    • Reduced Tillage
    • Ozone
  • Extension & Outreach
    • Overview
    • For gardeners
    • Organic management of vegetable diseases
    • Basil downy mildew
    • Tomato late blight
  • Site news
Extension & Outreach
HomeExtension & OutreachBasil downy mildew

Basil downy mildew

  • Photographs of basil downy mildew symptoms
  • How gardeners can manage downy mildew in basil
  • Information about downy mildew in basil including management
  • Occurrence on Long Island of Basil Downy Mildew Pathogen Race 1 that Overcomes some Resistant Varieties
  • Monitor and report occurrences
  • Results from Monitoring Program started in 2009
  • Impatiens Downy Mildew In The Landscape

Extension articles and meeting proceedings

  • Managing Basil Downy Mildew in the Greenhouse.  e-GRO Edibles Alert 7 April 2019
  • Field Studies On Managing Basil Downy Mildew In New York (February 2019)
  • Managing Basil Downy Mildew in Greenhouse and Field – Tips for 2016
  • Occurrence and Impact of Downy Mildew on Sweet Basil in 2015
  • Managing Basil Downy Mildew – New York Perspective
  • Managing Basil Downy Mildew in the Greenhouse  – Suffolk County Ag News article.
  • Downy Mildew and its Occurrence Across the USA
  • Efficacy of Conventional and Organic Fungicides for Managing Basil Downy Mildew, Long Island
  • Be on the lookout now for basil downy mildew (June 2014)

Research Results and Reports

 

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Contact

Margaret McGrath
Associate Professor Emeritus
(retired 5-2-23)
School of Integrative Plant Science
Plant Pathology and Plant-Microbe Biology Section
Long Island Horticultural Research & Extension Center
Riverhead, NY 11901-1098
Email: mtm3@cornell.edu

Need help …

… diagnosing or managing diseases? Contact your local office of Cornell Cooperative Extension. Not from New York? Find your office here. Or find help through the National Plant Diagnostic Network.

News highlights

  • Margaret Tuttle McGrath receives Long Island Farm Bureau Citizen of the Year Award
  • Margaret Tuttle McGrath receives NED-APS Award of Merit
  • McGrath featured in A Way to Garden podcast
  • McGrath featured in A Smarter Fall Cleanup in The New York Times
  • McGrath travels to China to share insights on cucurbit disease management
  • McGrath speaks at Mexican conference on disease management in vegetables
  • Curiosity and expertise earn Excellence in IPM award for Cornell ‘pumpkin whisperer’

Site news

  • Margaret Tuttle McGrath receives Long Island Farm Bureau Citizen of the Year Award
  • Margaret Tuttle McGrath receives NED-APS Award of Merit
  • Tomato virus alert
  • New Basil Downy Mildew Race 1 in NY in 2022
  • New photo gallery: Turnip mosaic virus on crucifers

A Way to Garden podcasts:

a way to garden logoMeg McGrath is an occasional guest on New York Times garden columnist Margaret Roach’s  popular A Way to Garden podcast. Follow the links to listen or read the interview transcript:

  • Basil and cucurbit downy mildews
  • What’s wrong with my tomatoes?

Featured

  • Photo gallery
  • Vegetable disease factsheets & articles
  • Managing vegetable diseases organically

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