Eastern New York Commercial Horticulture Enrollment

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Responding to Hailstorms

Crystal Stewart-Courtens, 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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Upcoming Events

ENY Orchard Soil Health and Beneficial Fungi Meeting

August 15, 2024 : ENY Orchard Soil Health and Beneficial Fungi Meeting
Peru, NY

The soils that we grow our trees in play a critical role in the success of our orchard's productivity.  Mycorrhizal fungi provide many benefits to the soils, though it is still unclear to what extent inoculating our soils with commercial blends of these fungi may have on the growth of trees during orchard establishment.

Join the members of CCE ENYCHP and the Cornell Soil Health Program for a field meeting on the basics of soil health, the potential benefits of mycorrhizal fungi, and an update on the current project status of our SARE grant on orchard mycorrhizal products.

This meeting is intended for farmworkers, young and beginning orchardists, and experienced orchard managers wanting to learn about the basics of soil health and mycorrhizal fungi within the orchard.

View ENY Orchard Soil Health and Beneficial Fungi Meeting Details

North Point Community Farm Twilight Meeting

Event Offers DEC Credits

August 19, 2024 : North Point Community Farm Twilight Meeting
Plattsburgh, NY

North Point Community Farm Twilight Meeting

Monday, August 19th 4-7 pm (rain or shine)

2172 Military Turnpike, Plattsburgh, NY 12901

$10 per farm

Join us for a tour of North Point Community Farm, a diversified vegetable, berry, and flower operation in the North Country. Farmers Marisa and Mike will give us an overview of their decision-making as they expand their business, increasing their high tunnel production, investing in new tillage equipment, and transforming an old dairy barn into an efficient wash-pack shed with food safety in mind. We'll end the evening with local food refreshments and an opportunity to network with growers from NY and VT.

DEC credits: 1.5 credits in categories 1A, 10, 23

View North Point Community Farm Twilight Meeting Details

Drinkwine Produce Twilight Meeting

Event Offers DEC Credits

September 16, 2024 : Drinkwine Produce Twilight Meeting
Ticonderoga, NY

Drinkwine Produce Twilight Meeting

Monday, September 16th 4-6 pm (rain or shine)

1512 Street Rd, Ticonderoga, NY 12883

Join us for discussions on high tunnel tomato production and sweet corn and pumpkin IPM at Drinkwine Produce in Ticonderoga. Henry Drinkwine will provide an overview of his practices for maintaining high yields of tomatoes, including pollination and soil fertility management. In the second half of the meeting, CCE specialist Chuck Bornt will review integrated pest management for sweet corn and pumpkins, with hands-on scouting and identification of key pests and diseases.

DEC Credits: 1.5 credits in categories 1A, 10, 23

View Drinkwine Produce Twilight Meeting Details

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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

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