Research Findings and Disease Occurrences of Note in 2012 on Long Island Meg McGrath Dept. of Plant Pathology and Plant-Microbe Biology LIHREC, Cornell.

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Presentation transcript:

Research Findings and Disease Occurrences of Note in 2012 on Long Island Meg McGrath Dept. of Plant Pathology and Plant-Microbe Biology LIHREC, Cornell University, Riverhead, NY Cornell University is an equal opportunity, affirmative action educator and employer.

Late Blight of Tomato and Potato

Date Late Blight First Detected Each Year on Long Island, NY 29 Jun Jun Oct Jun Jul Jun Aug May Oct 2008

Source(s) of Phytophthora infestans on Long Island in 2012 Infested seed potato? Infected volunteer potato?? Infected garden tomato seedling???

20 Jun 2012

Garden with unmanaged diseases 22 Aug 2012

Trifold Brochure Educating gardeners + farmers about late blight distributed > 20,630 brochures AFRI LB Project

Organic research block, Cornell University, LIHREC, LI, NY Evaluation of Tomatoes Resistant to Late Blight

JulietMt Fresh Plus Reported resistant

New YorkerMt Fresh Plus Ph1

LegendMt Fresh Plus Ph2

Plum RegalMt Fresh Plus Ph3

Defiant PHRMt Fresh Plus Ph2 + Ph3

Cornell Line Brandywine Ph2 + Ph3

Jasper

Mt Merit

Tomato Varieties + Experimentals Genes for Late Blight Resistance New Yorker (Ph1)Mountain Fresh Plus Legend OP (Ph2)Brandywine Plum Regal (homozygous Ph3)Juliet ?? JTO-545 (plum)(heterozygous Ph3) Matt's Wild Cherry (undetermined, Ph3?) Jasper (cherry)(undetermined resistance)Iron Defiant PHR (heterozygous Ph2+Ph3)Lady Mountain Magic (campari) (Ph2+Ph3) Mountain Merit (heterozygous Ph2+Ph3) Experimentals from Cornell Univ (Ph2+Ph3): NC123S x CU- TR5, NC123S x CU-TR3, and Brandywine x CU-TR3. US-23

Evaluating late blight resistant variety fruit

Resurgence in Phytophthora blight in 2011 and 2012 ; associated with intense rain events.

Phytophthora Blight in Previous Sod Fields Farms on Long Island. 5 Fields.

Carrot Powdery Mildew

Sweet Corn – Northern Corn Leaf Blight

Basil Downy Mildew Yellow banding on upper surface opposite dark spores produced on lower.

Downy Mildew - Cucumber new resistant varieties

Powdery Mildew – Cucurbits New mobile fungicides: Torino (Code U6) Fontellis (Code 7) Luna fungicides (Code 7) Fungicides - resistance issues: Pristine (Code ) Rally, Procure, etc (Code 3)