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 its 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 whats going on.
Leaf Roll (photo A) has a dramatic look and comes on suddenly, causing quite a shock to many growers. Luckily its 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 cant 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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Apples

Apples

Apricots

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Beets

Beets

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Blueberries

Broccoli

Broccoli

Brussels Sprouts

Brussels Sprouts

Cabbage

Cabbage

Carrots

Carrots

Cauliflower

Cauliflower

Cherries

Cherries

Cucumbers

Cucumbers

Dry Beans

Dry Beans

Eggplant

Eggplant

Ethnic Vegetables

Ethnic Vegetables

Garlic

Garlic

Grapes

Grapes

Horseradish

Horseradish

Kohlrabi

Kohlrabi

Leeks

Leeks

Lettuce / Leafy Greens

Lettuce / Leafy Greens

Melons

Melons

Nectarines

Nectarines

Onions

Onions

Parsnips

Parsnips

Peaches

Peaches

Pears

Pears

Peas

Peas

Peppers

Peppers

Plums

Plums

Potatoes

Potatoes

Pumpkins / Gourds

Pumpkins / Gourds

Radishes

Radishes

Raspberries / Blackberries

Raspberries / Blackberries

Rhubarb

Rhubarb

Rutabaga

Rutabaga

Snap Beans

Snap Beans

Squash - Summer

Squash - Summer

Squash- Winter

Squash- Winter

Strawberries

Strawberries

Sweet Corn

Sweet Corn

Sweet Potatoes

Sweet Potatoes

Tomatoes

Tomatoes

Turnips

Turnips

more crops

Upcoming Events

High Tech Precision Orchard Spraying

July 20, 2020

Join us the afternoon of July 20th to learn what's new in orchard precision spraying technology. We'll be joined by Dr. Jason Deveau, Dr. Heping Zhu, and Steve Booher.  After their presentations, we will open up the meeting for all three presenters to field questions and comments. 

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Announcements

U-Pick Farm Practices During Covid-19 Pandemic

U-Pick is a critical direct marketing approach for many of our farms and provides
customers with a unique connection to fresh produce grown close to home. In light
of what we understand about the spread of COVID-19, new management practices
will be needed to protect your farm team and your customers. This document
provides recommended practices and communication strategies for U-Pick
operations for the 2020 season.

https://rvpadmin.cce.cornell.edu/uploads/doc_864.pdf

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

2020 Biweekly Vegetable News Podcast - Episode 6 7/1/20

July 2, 2020
The July 1st, 2020 edition of the Eastern New York Vegetable News covers the following topics:

Cucurbit Downy Mildew Update (1:05)
Changes to the Paycheck Protection Program (9:10)
Managing Caterpillar Pests in Brassicas (12:53)
Strawberry Renovation (17:56)
Developing a Safety Plan to Comply with NY Forward Phased Re-Opening Requirements (24:12)

Here are links to additional resources mentioned in the episode:

NY Forward Safety Plans
Introductory “how to” video for writing your plan:
https://www.youtube.com/watch?v=V2PH3wCgdhc&feature=youtu.be

Cornell Agricultural Workforce Development NY Forward business safety plan support for farms
https://agworkforce.cals.cornell.edu/ny-forward-business-safety-plan/
• Plan templates
• Guidance and considerations for plan writing
• Links to “how to” videos
• Links to additional resources such as log templates, hand washing station plans, and more
• Webinar recordings

NYS Department of Agriculture and Markets novel coronavirus page: Guidance documents for farm businesses in multiple languages
https://agriculture.ny.gov/coronavirus

Strawberry Renovation
For more in-depth information re: strawberry renovation, visit http://www.hort.cornell.edu/fruit/nybn/newslettpdfs/2014/nybn1306.pdf.

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