Cornell Vegetable Program Enrollment

Program Areas

  • Food Safety
  • Variety Evaluation
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  • Pest Management
  • Cultural Practices

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  • Educational Meetings & Conferences
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  • On-Farm Research Trials

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Pests

PestsNumerous pests affect commercial vegetable production in New York. All stages of plant growth may be susceptible to insects or disease causing pathogens which may result in poor seedling emergence, reduced yields and quality issues. Similarly, weeds compete with vegetable crops for light, nutrients and water often reducing yields. Weeds can also act as a reservoir for insects and diseases. Furthermore, weed seeds and other parts can be a contaminant of certain vegetable crops.

Cornell Vegetable Program Specialists conduct research and educational programs on many important insects, diseases and weeds in New York. While not an exhaustive list, current information on many important vegetable pests can be found below. The most recent pest content is listed below but you can find more pests under the pest categories of Diseases, Insects, and Weeds.

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    Relevant Events

    2018 Empire State Producers EXPO

    Event Offers DEC Credits

    January 16 - January 18, 2018
    1.25 hr sessions throughout each day
    Syracuse, NY

    2018 Western NY Fresh Market Winter Vegetable Meeting

    Event Offers DEC Credits

    January 31, 2018
    8:00 AM registration, 8:30 AM - 3:30 PM program
    Lockport, NY

    2018 Western NY Fresh Market Winter Vegetable Meeting (Eastern location)

    Event Offers DEC Credits

    February 1, 2018
    8:00 AM registration, 8:30 AM - 3:30 PM program
    Irondequoit, NY

    Most Recent Pests Content

    Video: Downy Mildew

    Last Modified: July 6, 2017
    Video: Downy Mildew

    Downy mildew is a potentially devastating disease to cucurbits. It usually affects cucumbers and cantaloupes first; later in the season it can be found on summer squash and zucchini. During some seasons, downy mildew can spread to winter squash and watermelons. Growers need to be monitoring their fields. This short video shows the different stages of the disease and possible outcomes if it is not controlled.

    2017 Cucurbit Downy Mildew Management Guidelines

    Last Modified: July 5, 2017
    2017 Cucurbit Downy Mildew Management Guidelines

    From Margaret McGrath, Cornell
    Producing a high-quality cucurbit crop necessitates effectively managing downy mildew. This foliar disease is common in the northeast because the pathogen produces a large quantity of asexual spores that are easily dispersed long distances by wind, which enables it to spread widely. There has been no evidence that the pathogen is surviving between growing seasons where winter temperatures kill cucurbit crops (outdoors above the 30th latitude); however, recently both mating types have been found, albeit typically on different cucurbit crop types, thus there is the potential for the pathogen to produce oospores (sexual spores) that could enable the pathogen to survive in northern areas of the USA. The downy mildew forecasting program has documented based on downy mildew occurrence movement of the pathogen throughout the eastern USA each year via its wind-dispersed asexual spores. The pathogen does not affect fruit directly; however, affected leaves die prematurely which results in fewer fruit and/or fruit of low quality (poor flavor, sunscald, poor storability).

    The most important component of an effective management program for downy mildew is an effective, properly-timed fungicide program. And the key to that is applying mobile fungicides targeted to the pathogen starting when there is a risk of the pathogen being present. Mobile (or translaminar) fungicides are needed for control on the underside of leaves. Each year there often are changes to the fungicides recommended as the pathogen develops resistance or new products are registered. Because these fungicides have targeted activity, additional fungicides must be added to the program when there is a need to manage other diseases such as powdery mildew. Most targeted fungicides effective for downy mildew are also effective for Phytophthora blight.

    Cornell Onion Fungicide "Cheat Sheet" for Leaf Diseases, 2017

    Christy Hoepting, Extension Vegetable Specialist
    Cornell Vegetable Program

    Last Modified: July 5, 2017
    Cornell Onion Fungicide

    This chart provides information on fungicides available for use in New York in 2017 in onions for control of leaf diseases including Botrytis Leaf Blight (BLB), Purple Blotch (PB), Stemphylium Leaf Blight (SLB), and Downy Mildew (DM). This year, more fungicides and detailed efficacy ratings are provided per BLB, SLB, and DM from Cornell trials. Rotation restrictions and maximum allowable per season are provided. 


    More Pests Content

    Video: Swede Midge
    Video: Flea Beetles
    Help Us Define and Measure IPM Adoption and Practices in NY Vegetables: SURVEY
    2016 Weed Research in Vegetable Crops, Cornell University
    NEW! Pesticide Product Search Online
    White Rot Fact Sheet for Garlic
    Garlic Bloat Nematode Testing Services for 2016
    Northern Corn Leaf Blight in Sweet Corn
    2015 Stemphylium Leaf Blight Fungicide Trial Summary
    The Magnitude and Distribution of Western Bean Cutworm: The Risk to Dry Bean
    Scouting for Onion Thrips
    How to Sign the Waiver for the Indemnified Dual Magnum Label
    2015 Herbicides for Weed Control in Snap and Dry Beans
    Bacterial Blackleg - An Increasing Problem for Potato Growers
    Pesticide Options for Pests of Potato in New York, 2016
    2016 Beet Herbicide Chart
    Leaf Mold in High Tunnel Tomatoes 2015
    » View Complete List of Pests Content
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    Lettuce / Leafy Greens

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    Upcoming Events

    2018 Empire State Producers EXPO

    Event Offers DEC Credits

    January 16 - January 18, 2018
    1.25 hr sessions throughout each day
    Syracuse, NY

    The 2018 Empire State Producers Expo combines the major fruit, flower and vegetable associations of New York State in order to provide a comprehensive trade show and educational conference for New York producers, as well as the surrounding states and Eastern Canada. 
    view details

    Growing, Washing and Packing High Tunnel Winter Greens: Doing It and Doing It Well

    January 18, 2018
    9:00 AM - 4:00 PM
    Saratoga Springs, NY

    NOFA-NY 2018 Winter Conference: Pre-Conference Event
    This event promises to help growers bring their winter greens production to the next level -- both in the high tunnel and in the packshed. There will be an emphasis on best management practices in the high tunnel, especially practices which support long term soil health and fertility. In the packshed, processing efficiency and food safety will both be stressed.

    The day will begin at 9:00 am in conference room Broadway 1, with workshops on issues and opportunities in winter high tunnel production and best practices for postharvest handling, including food safety concerns.

    Upon completion of the workshops at 10:30 am, everyone will board a bus and travel to Paul and Sandy Arnold's Pleasant Valley Farm in Argyle, NY for a farm tour and farmer-led discussions in the high tunnel and packshed. A farm to table lunch, with a vegetarian option, will be served at the farm. After lunch, the tours and discussions will continue and then everyone will come together for a Q&A session with hot cider and light snacks. The bus will leave the farm at about 3:15 pm and should be back at the hotel by 4:00 pm. 
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    Produce Grower Food Safety Training - FSMA and GAPs/HGAPs

    January 30, 2018 : FSMA and GAPs/HGAPs Produce Safety Alliance Training Course

    January 31, 2018 : Workshop on Farm Food Safety Plan Writing

    This program is for fruit and vegetable growers who need Food Safety Modernization Act (FSMA) certification or GAPs/HGAPs (Good Agricultural Practices/ Harmonized Good Agricultural Practices) training required by buyers (i.e. 3rd-party food safety audits based on a written food safety plan) or if you are just interested in learning about produce safety.

    Over the course of the training, certified Produce Safety Alliance trainers will cover content contained in these seven modules:
    • Introduction to Produce Safety
    • Worker Health, Hygiene, and Training
    • Soil Amendments
    • Wildlife, Domesticated Animals, and Land Use 
    • Agricultural Water (Part I: Production Water; Part II: Postharvest Water) 
    • Postharvest Handling and Sanitation 
    • How to Develop a Farm Food Safety Plan
    An optional farm food safety plan writing workshop is offered on January 31. Separate registration required.
    view details
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    Announcements

    Cornell Commercial Vegetable Guidelines Available

    The 2018 Cornell Integrated Crop and Pest Management Guidelines for Commercial Vegetable Production are now available!

    Written by Cornell University specialists, this publication is designed to offer producers, seed and chemical dealers, and crop consultants practical information on growing and managing vegetable crops in New York State. Topics include general culture, nutrient management, transplant production, postharvest handling, organic production, and managing common vegetable crop pest concerns. A preview of the Vegetable Guidelines can be seen online.

    Highlighted changes in the 2018 Vegetable Guidelines include:
    • Updated pesticide options for economically important vegetable crop pests.
    • Significantly revised pest management practices.
    • New onion and sweet corn IPM scouting report forms.
    Cornell Crop and Pest Management Guidelines are available as a print copy ($41), online-only access ($41), or a package combining print and online access ($57.50). Shipping charges will be added to your order. Cornell Guidelines can be obtained through your local Cornell Cooperative Extension office, or from the Cornell Store at Cornell University or call (844) 688-7620.

    Available: 2017 Certified Seed Potato Directory

    The 2017 NYS Certified Seed Potato Crop Directory is now available. There is a wealth of information on NYS potato seed certification, as well as on the varieties grown for certification in 2017. The varieties include standards for processing and tablestock, newer varieties and numbered lines, and specialty/heirloom varieties. Brief summaries of the varieties' maturity, appearance, yield potential, and major disease susceptibility are included. Contact info for the growers with seed supplies of each variety is included. There is also a listing of the inspectors from the NYS Department of Agriculture and Markets in Albany and Syracuse.

    Growing for Wholesale Guidelines Available

    Grading and packing guidelines are now available for 16 commonly grown specialty crops in NYS: broccoli crowns, Brussels sprouts, corn, green peppers, cucumbers, green cabbage, red cabbage, savory cabbage, cauliflower, eggplant, green beans, jalapenos, poblanos, Hungarian hot peppers, summer squash, and zucchini.

    Acceptable quality standards and common defects that should be sorted out on the grading line are depicted in these resources, both visually and in outline form. Find all of the grading sheets here.

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