1. 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 mtm3@cornell.edu Cornell University is an equal opportunity, affirmative action educator and employer.

2. Late Blight of Tomato and Potato

3. Date Late Blight First Detected Each Year on Long Island, NY 29 Jun 199623 Jun 2009 3 Oct 200216 Jun 2010 5 Jul 200624 Jun 2011 26 Aug 200729 May 2012 3 Oct 2008

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

5. 20 Jun 2012

6. Garden with unmanaged diseases 22 Aug 2012

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

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

9. 9-14-12 JulietMt Fresh Plus Reported resistant

10. 9-14-12 New YorkerMt Fresh Plus Ph1

11. 9-14-12 LegendMt Fresh Plus Ph2

12. 9-14-12 Plum RegalMt Fresh Plus Ph3

13. Defiant PHRMt Fresh Plus 9-14-12 Ph2 + Ph3

14. Cornell Line 9-14-12 Brandywine Ph2 + Ph3

15. 9-19-12 Jasper

16. 9-19-12 Mt Merit

17. 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

18. Evaluating late blight resistant variety fruit

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

20. Phytophthora Blight in Previous Sod Fields 8-22-12 3 Farms on Long Island. 5 Fields.

21. Carrot Powdery Mildew 8-16-12

22. 10-2-12 Sweet Corn – Northern Corn Leaf Blight

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

25. Downy Mildew - Cucumber new resistant varieties

26. Powdery Mildew – Cucurbits New mobile fungicides: Torino (Code U6) Fontellis (Code 7) Luna fungicides (Code 7) Fungicides - resistance issues: Pristine (Code 7 + 11) Rally, Procure, etc (Code 3)