Eastern New York Commercial Horticulture Enrollment

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Allium Leafminer Active in Southern Pennsylvania

Teresa Rusinek, Vegetable Specialist
Eastern New York Commercial Horticulture

April 18, 2018

A new invasive insect pest in the Northeast known as the Allium leafminer (ALM), Phytomyza gymnostoma, damages crops in the Allium genus (e.g., onion, garlic, leek, scallions, shallots, and chives) and is considered a major economic threat to Allium growers. Originally from Europe, ALM was first detected in Lancaster County, Pennsylvania in December of 2015 and in New Jersey and New York in 2016. As of fall 2017, ALM activity has been confirmed throughout eastern Pennsylvania, New Jersey, Delaware, southeastern New York as well as Tompkins and Suffolk counties.

ALM is currently active in Lancaster, PA where the first signs of adult fly emergence were detected on April 13, 2018. Based on our observations from last spring in the Hudson Valley, we expect emergence in our area in the next week or so.  ALM will continue to emerge, feed and lay eggs in alliums over about 4 weeks.  Leaf mining from larvae will begin to show up within two weeks after first adult emergence and intensify over the duration of the flight.  The larvae mine their way toward the base of the allium plant where they will pupate. 

Growers who have alliums with green tissue growing in the field or in high tunnels now in southeastern New York should consider protective measures soon, especially in Orange, Ulster, Dutchess, Columbia, Sullivan, and Schoharie counties where significant infestations were observed last year.  If you have small plantings that can be covered with row cover to exclude emerging ALM flies, now is the time to do so as long as you didn't have infested alliums (including wild onion grass) in the same space last season.   Growers with larger plantings may consider applications of insecticides if and when significant ALM activity is observed in the allium crop. There are both organic and conventional insecticides labeled for allium crops to control this type of leafminer.  Insecticide efficacy tests are currently being conducted in both New York and Pennsylvania. It is important to carefully observe your allium crops over the next few weeks.  ALM oviposition/feeding may initially be observed along field edges. Be vigilant and please call  or email either Teresa Rusinek  at 845 389-3562, tr28@cornell.edu  or Ethan Grundberg at  617 455-1893, eg572@cornell.edu  if you see evidence of ALM feeding or have any questions about management. 



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Upcoming Events

Weed Management for Berries in NY

March 6, 2024 : Weed Management for Berries in NY

Join Cornell scientists, Dr. Bryan Brown, Dr. Lynn Sosnoskie, Rutgers University's Dr. Thierry Besançon, CCE Harvest NY's Anya Osatuke, and CCE ENYCHP's Laura McDermott to hear updates on the latest research concerning weed management in berries.

View Weed Management for Berries in NY Details

Northeast Extension Fruit Consortium Winter Webinar Series

March 6, 2024
March 13, 2024
March 20, 2024
: Northeast Extension Fruit Consortium Winter Webinar Series

View Northeast Extension Fruit Consortium Winter Webinar Series Details

How Profitable will My New Orchard Investment Be? Evaluating Capital Investment Decisions in a Farm Business

February 29, 2024 : Week 1 of the course (February 23-Feb 29)

In week 1 we cover:

  • How and why to use a structured process to make investment decisions.
  • Identifying the problem to be addressed, generating possible solutions and identifying what information you need to acquire.
  • Gathering data and using farm financial statements and farm financial ratios to help make decisions.

 In this zoom session we will go over what you learned in the on-line class.


March 7, 2024 : Week 2 (March 1 - March 7)

In week 2 you will:

  • Develop an enterprise budget and use your enterprise budgets and partial budget analysis to evaluate the risk and profitability of potential investments.
  • Use cost-benefit analysis tools that consider the time value of money to help you choose among investment options.
  • View How Profitable will My New Orchard Investment Be? Evaluating Capital Investment Decisions in a Farm Business Details

    Announcements

    2023 Spotted Wing Drosophila Monitoring/Management

    All berry farmers are watching for monitoring reports that indicate Spotted Wing Drosophila (SWD) adults are in their region. Mid-season berry crops should be sprayed as soon as berries begin to ripen unless you've elected to use insect exclusion netting.

    - For general information about SWD, and to enroll for free monitoring reports, visit the Cornell SWD blog https://blogs.cornell.edu/swd1/.
    - Click here for the 2023 Quick Guide for Pesticide Management. 
    - For some great instructional videos and fact sheets on insect exclusion netting, visit the University of Vermont's Ag Engineering blog.


    Resources from CCE ENYCHP!

    We are developing new ways to connect with the CCE ENYCHP team this year! We have a Youtube page located at this link. Check out videos on Table Grape Production, Pest Updates and the 20 Minute Ag Manager - in 4 Minutes series

    We have a Facebook Page here as well as an Instagram page. We keep these places updated with current projects, events, and other interesting articles and deadlines.

    There are also text alerts available. Fruit and vegetable farmers in 17 Eastern NY counties can now receive real time alerts on high risk disease and pest outbreaks texted directly to their cell phone. The Eastern NY Commercial Horticulture program, which is supported by local Cornell Cooperative Extension associations, will now offer text alerts to those that enroll in our program in 2019. 

    The text alerts will be reserved for important crop alerts that could impact management decisions immediately. For instance, if there were an outbreak of Late Blight in the area, this would be transmitted to vegetable growers.

    Farmers can choose the crop for which they wish to receive updates. Additionally they can request that Ag Business Alerts be sent to them. These alerts might include due dates for crop insurance deadlines, market opportunities etc.

    If you have questions, please contact enychp@cornell.edu


    Podcasts

    Winter Greens Grower Interviews in Northern New York

    October 22, 2022
    In this episode, vegetable specialist Elisabeth Hodgdon interviews Lindsey Pashow, ag business development and marketing specialist with the Cornell Cooperative Extension Harvest New York team. They discuss findings from a series of interviews with winter greens producers in northern New York. Lindsey shares production and marketing challenges associated with growing winter greens in this cold and rural part of the state, success stories and advice from growers, and tips for those interested in adding new crop enterprises to their operation.

    Funding for this project was provided by the Northern New York Agricultural Development Program. The episode was edited by Miles Todaro of the ENYCHP team.

    Resources:
    • Crop enterprise budget resources available from Penn State Extension (field and tunnel vegetables: https://extension.psu.edu/small-scale-field-grown-and-season-extension-budgets), UMass Extension (winter spinach budgets: https://ag.umass.edu/vegetable/outreach-project/improving-production-yield-of-winter-greens-in-northeast and field vegetables: https://ag.umass.edu/vegetable/fact-sheets/crop-production-budgets), and Cornell Cooperative Extension (high tunnel vegetables: https://blogs.cornell.edu/hightunnels/economics/sample-budgets-spreadsheets/). Use these budgets as templates when developing your own crop enterprise budget.
    • The Organic Farmer’s Business Handbook, by Richard Wiswall
    • The Winter Harvest Handbook, by Eliot Coleman

    For questions about the winter greens project discussed in this podcast, reach out to Lindsey Pashow (lep67@cornell.edu) or Elisabeth Hodgdon(eh528@cornell.edu).

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