Eastern New York Commercial Horticulture Enrollment

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Early Season Tomato Leaf Symptoms

Amy Ivy, Vegetable Specialist
Eastern New York Commercial Horticulture

June 25, 2014

Once tomatoes are over their initial transplant shock and begin to push out new growth, growers often breathe a sigh of relief. Most growers got their plants in later than they would have liked but finally, whether inside a tunnel or out in the field, the plants are really taking off.
Tunnel grown tomatoes get more attention from growers than field grown but itís always a good idea to pay close attention to all your crops in an effort to catch problems early on. Here are a few leaf symptoms that may catch your eye this month. Remember you can call on any of us in the Eastern NY program to help you diagnose whatís going on.
Leaf Roll (photo A) has a dramatic look and comes on suddenly, causing quite a shock to many growers. Luckily itís a physiological response to stress and the plants should grow out of it. It occurs most commonly the day after a heavy pruning in tunnels. If the soil is dry when you do the pruning, the stress will be even greater. Try to get into the habit of pruning a little bit every week, rather than one big pruning job less often. Sometimes it canít be helped so make sure your plants have a good soaking and let them grow out of it.
Virus-like symptoms (photo B) are more subtle but very distinctive. Where leaf roll is usually a lengthwise curling of full-sized leaves, the various virus diseases cause cupping, oddly scalloped and cut, and odd color patterns on the leaves. This photo shows one example of what a virus can do to leaves, there are other variations but there is a similar oddity to them that makes them distinctively viral.
Magnesium deficiency (photo C) can be startling but this is not an issue. It starts on the lowest leaves and works up the plant very gradually. It first appears when the first fruit clusters begin sizing up and as long as basic nutrient needs are being met, it is not a concern. Tunnel grown tomatoes push out vigorous growth and can become deficient more quickly than field grown. A foliar sample will give you much more accurate information. Epsom salts and sul-po-mag are some sources of supplemental magnesium.


Leaf Roll (pdf; 442KB)

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Upcoming Events

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Announcements

2022 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 2022 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:
‚ÄĘ 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.
‚ÄĘ The Organic Farmer‚Äôs Business Handbook, by Richard Wiswall
‚ÄĘ 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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