Eastern New York Commercial Horticulture Enrollment

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  • Cultural Practices

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Leeks

Leeks There are roughly 30 acres of leeks grown in New York annually. They are an edible member of the Liliaceae or lily family. They are tender and have a mild onion flavor with a slightly sweet edge. Leeks may be planted in late February to March for harvest in early- to mid-summer. Alternatively, they may be planted in July for harvest in late fall/early winter.

Leek is an expensive crop to grow, because it is labor intensive. Hand labor is required for all stages of production including: transplanting, weeding, harvesting, washing and packing.

Information on cultural practices and pests of leeks can be found in the Leek Pest Management Strategic Plan.
Most Recent Leeks Content

Leek Moth Control and Information

Christy Hoepting, Extension Vegetable Specialist
Cornell Vegetable Program

Last Modified: May 24, 2012
Leek Moth Control and Information

Leek Moth was detected in four home gardens in Plattsburg, NY in 2009. It was first detected in Ontario, Canada in 1997 where it has become problematic especially to small-scale, organic growers in eastern Ontario and to commercial producers in western Quebec, who have limited insecticides available to them.

Leek Moth continues its spread to more farms and gardens across the U.S., a new comprehensive website is available to aid in the identification and management of this pest. This Cornell website features maps of the distribution of leek moth, protocols on insect monitoring and identification, best management practices for farms and home gardens, a photo gallery of damage symptoms and a comprehensive resource section.

Visit the Leek Moth website.



More Leeks Content

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Upcoming Events

Effective Orchard Spraying & Navigating NEWA Workshop- Champlain Valley

March 28, 2017
8:00am- 4:00pm
Chazy, NY

Effective Orchard Spraying - Morning
Understand how to improve your timeliness and therefore apply sprays when needed and not be forever chasing the calendar. Correct application at the correct time will allow you to make better use of your time and materials over the season.

Navigating NEWA - Afternoon 
Learn the ins-and-outs of the NEWA system (Network for Environment and Weather Applications). Learn how to efficiently navigate the NEWA interface, including how to get weather data, access station specific pages, and effectively utilize models for insects, diseases, crop thinning, and irrigation.

Bring your Laptop or Smart Device!!

***PRE-REGISTRATION IS REQUIRED! ***


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Hudson Valley Orchard Scouting & NEWA Orchard Models Workshop

March 30, 2017
10:00am-3:00pm
Highland, NY

Interested in learning how utilize the NEWA orchard models and learn pest scouting techniques to improve your orchard pest management?  NEWA Coordinator Dan Olmstead, HVRL entomologist Peter Jentsch, HVRL plant pathologist Dr. Srdjan Acimovic, and ENYCHP tree fruit specialist Dan Donahue will be presenting a workshop at the Cornell Hudson Valley Research Lab on March 30th from 10 am to 3:00 pm. 
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Pruning Demonstration Day

March 30, 2017
2pm-5pm
Red Hook, NY

You are invited to join Laura McDermott and Jim O'Connell, Berry Educators for Cornell Cooperative Extension of Eastern NY, for a pruning demonstration on mature blueberries on Thursday, March 30th.

This workshop is free, but please preregister with Jim O’Connell no later than March 28th, 2017 by email (jmo98@cornell.edu) or phone (845-943-9814) so we know how many people to expect. 

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Announcements

White Rot Update

NOW AVAILABLE: White Rot Fact Sheet: Click Here

Earlier in June I sent a garlic sample to the diagnostic lab hoping that I was wrong. The sample was covered in small black sclerotia, the size of poppy seeds, and white fungal hyphae crept up the stem. The results, unfortunately, matched the field diagnosis: White Rot. Within a couple days additional calls came from up and down the Hudson Valley as well as one in Western NY with similar suspicions. These samples have also gone to the lab for verification, but it looks like the latest pest to move back into the state is this nasty fungus. 

White Rot, Sclerotinia cepivorum, decimated the onion industry in New York in the 1930's before being eradicated through careful management. More recently, in 2003, it infected 10,000 acres of garlic in California, leading to the abandonment of some garlic fields and adoption of strict containment rules. White rot has been confirmed in Northeastern states over the last decade as well, with New York being one of the last to discover the disease.

The primary reason that White Rot is such a concern is because the sclerotia, or reproductive structures, can remain dormant in the soil for up to 40 years, attacking any allium crop planted into the soil under favorable conditions. This spring was ideal for infection due to the period of cool, moist weather we had. Optimal temperature for infection is 60-65 degrees F, but infection can occur anywhere from 50-75 degrees F.
Once garlic has white rot, it generally declines rapidly. Leaves will yellow and the plant will wilt, not unlike a severe fusarium infection. However, unlike with fusarium, white rot infected bulbs are covered in black sclerotia and white fungus. To add to the confusion, another disease CAN look similar. Botrytis also causes black sclerotia and white fungal growth. However, Botrytis sclerotia are quite large, often larger than a pencil eraser.

So, what do we do now? We're still working on long-term management strategies, but the most important steps to take now are vigilance when culling (look at the plants you are pulling for symptoms like you see in this article, and if they are present, call us to take a sample and have the disease verified) and, if you see anything suspicious, reduction of movement of inoculum. The main ways diseases get moved around are by dumping culls (compost, field edges, etc) and my moving soil on equipment. Throw away your culls, and wash equipment that may have come in contact with suspicious garlic or the soil it is growing in. Everything from cultivation equipment to harvest bins should be cleaned. 

We will keep learning about this disease and will keep sending out information, particularly to help you make decisions about what to sell and buy. For now, remember that the west coast has learned to manage the disease, and we will too. -Crystal Stewart, ENYCHP




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