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Responding to Hailstorms

Crystal Stewart, Extension Vegetable Specialist
Eastern New York Commercial Horticulture

June 26, 2013

Responding to Hailstorms
Preparing for hail: There are some normal maintenance activities that will also benefit your plants in the event of a hailstorm. The use of rowcovers may help to diffuse the impact of hailstones and reduce injury to plants, especially when using rowcover and hoops. When deciding how long to leave those covers on, or whether to put them on your later plantings, this is a factor to consider. However, we have also seen rowcovers completely removed by the high winds that can precede hail, so this is certainly not a fail-safe.
The second precaution which will help in the event of hail is the application of a preventative fungicide such as copper or chlorothalonil. Although these products are not rain-fast, we have found that they still help reduce incidence of fungal and bacterial infections from hailstorms.

After hail: The damage left by hail varies tremendously based on the size and shape of the hailstone, the wind velocity of the storm, and the duration of the hail event. Deciding how to respond is really case-by-case. Two farms right next to each other can experience very different levels of damage. However, there are some rules of thumb that generally hold true.

1) Cucurbits are going to look really bad but are likely to recover. Those huge leaves tend to tatter very dramatically during hail, and can look absolutely awful. However, the leaves can also help to protect the growing points, which largely determine whether a plant will recover or not. Generally cucurbits that are old enough to have an established root system and have intact growing points will be able to generate new leaves very quickly and will begin producing fruit within a couple of weeks. To facilitate this process, give some extra nitrogen through the drip system.  Pick and remove summer squash fruit that were damaged by hail if you can.

2) All plants will benefit from a protective fungicide application. After hail, plants have hundreds of small (or large) wounds which leave them extremely vulnerable to diseases. As soon as you can get on the field, apply a protectant such as copper or chlorothalonil (copper will protect from bacterial and fungal diseases so is the better option), even if you applied one before the storm. This will help prevent infection while the plant heals up those wounds.

3) Incidence of bacterial rot in onions is going to increase. We tend to see many more issues with onion storage following hail. Copper may help somewhat, but results have been mixed to poor. 

Deciding what to do with tomatoes can be tricky. According to Dr. Reiners, determinate varieties suffering from moderate to severe damage (think of snapped branches and stripped leaves-Image 1) are most likely to be lost causes because by the time they recover they will practically be at the end of their lives. It is best to pull plants at this threshold out. Indeterminate tomatoes have a better chance of recovering from hail. All fruit which was hit will be relegated to seconds at the very best. Damage can vary greatly by variety because of the differences in canopy cover, so assess each separately. Last year we saw Primo Reds that were a complete loss next to Amish Paste tomatoes which were about 80% ok.

On plants with heavy foliage such as corn and sweet potatoes, a foliar feeding including nitrogen and some micronutrients may be beneficial. Remember that you have to have intact foliage to spray for this to be effective.

Once you have done everything you can to clean up and protect your plants, it is often best from a mental health standpoint to walk away for a few days up to a week. There is a small period of time where this is nothing more to do but let the plants recover. Nice time for a mini vacation. Really.

As always, if you would like help deciding what to do after hail or any other weather event, please give us a call.

 



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Apples

Apples

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Apricots

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Asparagus

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Beets

Blueberries

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

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Upcoming Events

October Last Monday Grant Webinar for Fruit and Vegetable Growers

October 28, 2019
4:00 pm

Are you curious about what grants are available to help your farm business?

To help disseminate information on grants on a consistent basis, ENYCH is offering a "current grants" webinar on the last Monday of every month at 4:00pm

Each month's webinar focuses on 1 grant.  The October webinar topic is TBD but might feature Ag Labor Housing Grants.
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Produce Safety Alliance FSMA Grower Training Course

October 30, 2019
8am - 5pm
Canajoharie, NY

A grower training course developed by the Produce Safety Alliance (PSA) that meets the regulatory requirements of the Food Safety Modernization Act (FSMA) Produce Safety Rule.  At least one person per farm producing more than $25,000 worth of fruits and vegetables must attend this course once.  Participants will receive a certificate of course completion by the Association of Food and Drug Officials. 

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Tarping for Reduced Tillage Workshop

November 2 - November 19, 2019

Are you a vegetable farmer already using tarps? Or are you wondering if and how tarps could work best on your farm?

The Cornell Small Farms Program is excited to announce a series of workshops on tarping for reduced tillage in small-scale vegetable systems, to be held in Maine and New York this fall. The Reduced Tillage (RT) project of the Cornell Small Farms Program supports farmers in adopting scale-appropriate RT practices that can lead to healthy, productive soils and greater profitability. Through the evaluation of novel tools and methods using systems-based field research and on-farm trials, the project helps farmers learn about the approaches that can work for their farm. This work is accomplished in collaboration with the University of Maine, and with support from Northeast SARE.

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Announcements

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

Climate Change Adaptations

September 30, 2019
In this episode regional vegetable specialist Elisabeth Hodgdon interviews University of Vermont PHD student Alissa White about a series of interviews with growers in the north east concerning climate change adaptations.

Listeners can access Alissa White’s climate change adaptation survey report and additional information on the project by clicking on the following link:

https://adaptationsurvey.wordpress.com/results/
Alissa’s project was sponsored by a Northeast SARE Graduate Student Grant (GNE17-163).

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