Eastern New York Commercial Horticulture Enrollment

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Onion and Seed Corn Maggot Concerns in a Cold, Wet Spring

Crystal Stewart-Courtens, Extension Vegetable Specialist
Eastern New York Commercial Horticulture

April 18, 2018

Last year we saw a lot of problems with root feeding damage from maggots early in the season, which has growers on edge about pest pressure this year. Seed corn maggots can damage a variety of crops, and in previous years have been observed on everything from sunflower shoots in the greenhouse to pea seedlings and onion transplants in the field. Onion maggots are more particular, and will only feed on allium hosts.

 Both seed corn and onion maggot flies are attracted to and will lay eggs in fields with large amounts of decomposing organic matter. Large applications of compost and decomposition of robust cover crops benefit cash crops, but also have this unforeseen side effect. For this reason, planting early crops into fields with lower organic matter is a best practice if maggots are a concern on organic farms. Conventional growers will often choose to use seed treated with an insecticide to protect early plantings.

 In small scale plantings it's also possible to exclude adults by applying insect netting or row cover during flights. Onion maggot flights are tracked on the NEWA website, which tracks growing degree days (GDD):  http://newa.cornell.edu/index.php?page=onion-maggot Seed corn maggot flight is also predicted by growing degree days, although NEWA doesn't use a model.

 When will the maggots arrive?  Right now we have accumulated 83 GDD at a base of 40 F in Clifton Park (Saratoga County) and 148 GDD in Montgomery (Orange County). Seed corn maggots emerge at 360 GDD base 40, and onion maggots emerge at 400 GDD base 40. We have a ways to go, with GDD accumulating faster the higher the temperature climbs above 40. If using exclusion netting, get it on prior to the flight starting. Another option, if feasible, is to hold plants in a protected environment until after the flight has concluded.



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Upcoming Events

From Seed to Success: Turn Your Idea into an Actionable Plan

January 7, 2025
January 14, 2025
January 21, 2025
January 28, 2025
February 4, 2025
February 11, 2025
February 18, 2025
February 25, 2025
March 4, 2025
: From Seed to Success: Turn Your Idea into an Actionable Plan

Do you need a business plan for your farm?  Do you have an idea for a new venture, but aren't sure if it will work? This program is for you!

This course is designed for existing farm businesses or those planning to undertake a new farm business venture. Students will work with their farm's data, and the goal of the class is for participants to have a draft of a written business plan for a specific business venture.

During the course, you will learn to:

  • Assess whether or not a business idea is a good fit for you.
  • Develop a marketing strategy to make a profit
  • Use financial tools to evaluate if your business has the potential to be profitable

This online course meets from January 7-March 4, 2025.  All course content is available online so you can work on it at your own pace.  There will be weekly webinars where you can meet other students and interact directly with the instructor on the content.  These webinars will be recorded. 

View From Seed to Success: Turn Your Idea into an Actionable Plan Details

Blind Industry White Wine Tasting Workshop

January 28, 2025 : Blind Industry White Wine Tasting Workshop
Germantown, NY

This event is a blind wine tasting for ENY grape industry members to get feedback from fellow growers and Cornell Enologists on unfinished white wines (hybrid, vinifera, etc.)

We respectfully request that only professional winemakers or commercial vineyard owners attend, as space is limited. Limit two wines per winery/vineyard.

Pre-registration is required and ends on January 14th.  For questions, please contact Jeremy Schuster at jds544@cornell.edu

View Blind Industry White Wine Tasting Workshop Details

NYS Grown and Certified Grant Program Webinar

January 29, 2025 : NYS Grown and Certified Grant Program Webinar

Are you planning to apply to the NYS Grown and Certified ITRD Grant Program, but you have hit a wall in completing the application?  This webinar is for you.  Meet with Cornell Cooperative Extension Educators statewide who are providing support to farmers applying for this program.

View NYS Grown and Certified Grant Program Webinar Details

Announcements

2025 CCE ENYCHP Fruit and Vegetable Conference

Join us for the Annual Eastern NY Fruit and Vegetable Conference February 19th and 20th, 2025 at the Desmond Hotel and Conference Center, 660 Albany Shaker Road, Albany, NY 12211

We are back with two full days of informative sessions and over 10 DEC Pesticide Recertification Credits Available!  Sessions this year include Tree Fruit, Vegetables, Small Fruit, Grapes, Bedding Plants and other related topics and visit with more than 50 vendors! 

For the full program, CLICK HERE or to register, CLICK HERE!

Program Overview & DEC Pesticide Recertification Credits:
Wednesday, February 19, 2025:
  • Tree Fruit Session 1, 9:00 am - 12:00 pm 2.0 Credits in Categories 10, 1a and 22
  • Tree Fruit Session 2, 1:15 pm - 4:00 pm 1.75 Credits in Categories 10, 1a and 22
  • Small Fruit Session,  9:00 am - 12:00 pm - 2.0 Credits in Categories 10, 1a and 22
  • Grape Session, 8:50 am - 11:45 am - 1.0 Credits in Categories 10, 1a and 22
  • H2A, 1:15 pm - 3:50 pm

Thursday, February 20, 2025
  • Tree Fruit Session 3, 8:20 am - 12:00 pm - 0.5 Credits in Categories 10, 1a and 22
  • Bedding and Vegetable Transplants, 9:00 am - 11:30 am - 1.50 Credits in 10, 1a,24 and 23
  • Vegetable Session, 1:15pm - 3:50pm - 1.5 Credits in Categories 10, 1a, 21, 23 and 0.25 Core
  • Marketing Session, 8:50 am - 12:00 pm
  • Funding Opportunities, 1:15 pm - 3:30 pm
Hope to see you there!



Resources from CCE ENYCHP!


This website (https://enych.cce.cornell.edu/) contains our calendar of upcoming programs and registration links. For updated programmatic information, technical resources and links to newsletters please see our program blog site: https://blogs.cornell.edu/enychp/.
We also maintain the following online resources that you can view directly from these links:

• CCE ENYCH YouTube (program videos): https://www.youtube.com/channel/UCSk_E-ZKqSClcas49Cnvxkw

• CCE ENYCH Facebook (program social media): https://www.facebook.com/CCEENYCHP/

• CCE ENYCH Instagram (program social media): https://www.instagram.com/cceenychp/?hl=en


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