Vegetable Crops Edition

Seasonal updates and alerts on insects, diseases, and weeds impacting vegetable crops. New Jersey Commercial Vegetable Production Recommendations updates between annual publication issues are included.
 
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Rutgers Weather Forecasting - Meteorological Information important to commercial agriculture.

NJ DEP issues Controlled Open Burn Permit from April 18, through Wednesday April 22.

(TRENTON) – With the state expected to experience cooler spring temperatures, the Department of Environmental Protection has agreed with NJDA Secretary Ed Wengryn’s request to allow farmers to do controlled open burning or use specialized torches known as smudge pots to protect flowering crops from damage beginning Saturday, April 18, through Wednesday, April 22. Temperatures are expected to drop to the 30s or below this week with varying winds through portions of the state. These expected temperatures follow warm temperatures in recent days. Damage from freezing weather now can significantly reduce yields of certain fruits and vegetables that are in the flowering stage.

The DEP and the Department of Agriculture are allowing these steps to protect farmers’ livelihoods and ensure that consumers can enjoy an ample supply of Jersey produce later this year.  The DEP intends to exercise its authority and discretion under the Air Pollution Control Code, N.J.A.C. 7:27, et seq., and other applicable authorities to permit the following procedure for open burning or the use of smudge pots to assist farmers in protecting their crops in low temperatures. Farmers who believe they will need to conduct open burns and/or use smudge pots must provide notice to the DEP’s 24-hour Communications Center at 1-877- WARNDEP (1-877-927-6337). Notification to DEP does not require implementing either technique, but it ensures proper procedures are followed should they become necessary. If a farmer does not call DEP in advance but uses either technique, the farmer must notify DEP by 9 a.m. the following day. The farmer will be asked which technique was used. Farmers must record the incident number provided to them by the Communications Center. The following information is to be provided:

 Name of the individual making the decision to conduct the open burning/use of smudge pots and name of the farm.

  • Actual street address of the farm on which either technique will be used (no P.O. Boxes).
  • Telephone number of a contact at the farm.
  • Predicted temperature (in degrees Fahrenheit) at the agricultural operation when the technique will be used.
  • Wind speed anticipated when the technique will be used.
  • Predicted hours of open burning and/or use of smudge pots.
  • Materials expected to be burned.
  • At the time of the initial call to the Communications Center, farmers will be given an email address and incident number.

Within two days, they must submit to DEP via this email address the following information:

  • The DEP Communications Center incident number.
  • Ambient temperature (in degrees Fahrenheit) at the time the technique was used.
  • Actual wind speed at the orchard at the time the technique was used.
  • A statement verifying that all restrictions in the open burning or use of smudge pots were followed.
  • The New Jersey Department of Environmental Protection and New Jersey Forest Fire Service caution all farmers and agriculture businesses with respect to the use of open burning in high wind velocity conditions. Please take note that farmers are encouraged to utilize smudge pots for warming as necessary during higher wind conditions. Use of open burning when wind velocity is greater than 5 mph is strictly prohibited, may contribute to wildfire risk, and can carry significant penalties.
  • Smudge pots must be fueled only with either kerosene or No. 2 fuel oil.
  • Open burning can consist only of either the following materials: clean and untreated scrap lumber, felled trees, clippings pruned from trees and shrubs, hedgerows, or firewood. Absolutely no refuse, trade waste, tires or garbage of any type may be added to the authorized open burning material.

 The New Jersey Department of Environmental Protection and New Jersey Forest Fire Service caution all farmers and agriculture businesses with respect to the use of open burning in high wind velocity conditions. Please take note that farmers are encouraged to utilize smudge pots for warming as necessary during higher wind conditions. Use of open burning when wind velocity is greater than 5 mph is strictly prohibited, may contribute to wildfire risk, and can carry significant penalties.

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The New Jersey Department of Agriculture (NJDA), established in 1916, serves New Jersey’s agricultural community and residents through a wide range of programs across its divisions that ensure the preservation and continuation of the state’s agricultural landscape.  NJDA works to ensure the safety and quality of New Jersey’s food supply, protect animal and plant health, and promote the overall long‑term viability of agriculture. The Department also connects consumers with New Jersey’s farmers and locally grown products while supporting the state’s diverse agricultural industry through initiatives of the Jersey Fresh program.  

For more information about the New Jersey Department of Agriculture, follow us on Facebook at www.facebook.com/NJDeptofAgriculture and www.facebook.com/JerseyFreshOfficial; on Instagram @njdeptofagriculture; on X/Twitter @NJDA and @JerseyFreshNJDA; and on LinkedIn at New Jersey Department of Agriculture. 

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Farm Safety Needs Assessment Closing May 1

The Rutgers Farm Health and Safety Working Group is conducting a survey to evaluate the priority needs of New Jersey farmers for training and resource development related to safety and health.  As a New Jersey farmer, you are invited to complete this survey by Friday, May 1, 2026. Click here to access the survey and learn more.  [Read more…]

April 28th Evening Webinar: Using Drones in Agriculture

Using Drones in Agriculture
Free Webinar
Date: April 28, 2026
Time: 7:00-8:30 PM

A 3-year USDA Sustainable Agriculture Research and Education Grant was awarded to a team of Agricultural Agents at Rutgers to study the use of drones in agriculture. Please join this team on Tuesday, April 28th at 7:00PM to learn about their work and the use of drones for agriculture. This program will highlight research projects, and real-world uses of drones in agricultural operations and will foster discussion and networking for anyone interested in using drones in their agricultural operation.

7:00 PM Drone Technology: A Tool for Crop Production and Management Stephen Komar, ANR Agent /Rutgers SARE Coordinator
7:25 PM Getting Started with Drones: Regulatory Compliance and Other Practical Considerations Adam Kyle, Warren Co. Com. College, Teaching Administrator, Precision Agriculture
7:50 PM Trusting the Data: Ground Truthing for Monitoring with Drones – Michelle Infante-Casella, ANR Agent/Rutgers SARE Co-Coordinator
8:15 PM Questions

To Join, please click the Zoom link below.
https://rutgers.zoom.us/j/95326725115?pwd=6JefhuSGbbBqjWdmDbKLXZ7exEr3la.1

This event is sponsored by a grant awarded by the USDA, Sustainable Agriculture Research and Education Program.

For questions contact Stephen Komar, Agricultural Agent and NJ SARE Coordinator via email at komar@njaes.rutgers.edu

Recent Increase in Tomato Prices

Tomato prices in the United States have risen notably in recent months, driven by a combination of supply constraints, trade policy changes, and rising costs throughout the supply chain. Tomato prices at the consumer level nationwide, as measured by the Consumer Price Index (CPI), increased 18% from February to March and were 24% higher than a year earlier. Consistent with this trend, wholesale market data from terminal markets in New York and Philadelphia indicate strong price increases.

Source: USDA Market News; figure created by the author.

Note: Weekly tomato prices (non-organic) at the New York and Philadelphia Terminal Market by origin and year. Prices in 2026 are highlighted in red, while earlier years (2022–2025) are shown for comparison. Line types distinguish between origins.

 

Why Are Tomato Prices Increasing?

One of the primary drivers of higher prices is tight supply conditions. Weather disruptions in major producing regions such as Mexico and Florida have reduced available volumes, creating shortages across the supply chain.

Trade policy has also played a significant role. The imposition of tariffs on Mexican tomatoes, which account for roughly 70% of U.S. fresh tomato consumption, has increased import costs and contributed directly to higher market prices.

In addition, broader economic factors are amplifying price pressures. Rising fuel and transportation costs have increased the cost of moving perishable goods such as tomatoes, while higher input costs (e.g., energy and fertilizer) are raising production expenses, particularly for greenhouse production.

 

North Jersey Tree Fruit and Vegetable Twilight Meeting

North Jersey Tree Fruit and Vegetable Twilight Meeting 

Supported by

New Jersey Vegetable Growers Association

 

April 30, 202

4:30 PM-7:30 PM

Ort Farms

25 Bartley Rd.

Long Valley, NJ 07853

 

4:15 PM – Registration and Tour of Farmers Market

4:30 PM – Wagon Tour of the Farm

5:00 PM – Light Dinner (Sponsored by NJ Vegetable Growers Association)

5:30 PM – Proper Pesticide Handling, Personal Protective Equipment and Record Keeping

Janine Spies PhD, State Fruit IPM Program Leader, Rutgers NJAES

6:00 PM – Tree Fruit Insect and Disease Update

Kaitlin Quinn, North Jersey Tree Fruit IPM Program Associate, Rutgers NJAES    

6:30 PM – Key Management Decisions to Minimize Disease, and Pest Pressure while Enhancing Yield in Strawberry Production

Peter Nitzsche, Agriculture and Natural Resources Agent I, Rutgers NJAES

7:00 PM – Managing Thrips in Vegetable Crops

Amanda Quadrel, North Jersey Vegetable IPM Senior Program Coordinator, Rutgers NJAES

The following pesticide recertification credits will be awarded 

1 Unit CORE    3 Units 1A    3 Units 10    3 Units PP2

Please RSVP for the meeting by April 27 with a call to:

Kim Crommelin at 908.788.1338 or kfrey@co.hunterdon.nj.us

Allium Leafminer Update 4/7/2026

Greetings from the Veg IPM team!

We detected the first Allium Leafminer oviposition scars on garlic in Burlington County, NJ today (see photos below). Adults are likely active throughout the state at this time. Be on the lookout for oviposition scars on both crop alliums and wild alliums such as wild onion/garlic and ramps. You can also use yellow sticky cards to monitor for adult presence in the field.

Allium Leafminer oviposition scars. Notice the neat line of white dots near the tips of the leaves. Photos by Maria Cramer.

Allium Leafminer (Phytomyza gymnostoma) is a small grey-bodied fly with a yellow head (A). In warm, still weather, you may see adult flies settling on foliage. The females lay eggs in neat rows, leaving behind a line of white dots on the leaves (B). As the larvae hatch and begin to feed, they will tunnel downwards, causing damage to leaves and bulbs. ALM have two generations per year; the first in early spring, and the second occurring in the fall. Crops such as chives, scallions, garlic, onions and leeks are attacked by ALM, but leeks and scallions seem to be the most affected. 

An allium leafminer adult (A) and oviposition scars (B). Photos by Maria Cramer a7l;/nd Amanda Quadrel

If you are concerned about crop injury due to ALM, floating row covers, kept on until the first flight ends (around the end of May) can restrict ALM’s access to vulnerable plants. Reflective mulches may also provide some additional crop protection. Adults and larvae can be targeted through well-timed insecticide sprays. Materials labeled for ALM control include spinosyns (IRAC 5- Radiant or Entrust (OMRI approved)), pyrethroids (IRAC 3A- Mustang Maxx, Proaxis, and Warrior II), neonicotinoids (IRAC 4A- Scorpion, Venom), the insect growth regulator Trigard (IRAC 17), and diamide products (IRAC 28- Exirel, Minecto Pro). The newly registered product Vertento (IRAC 30) may also be used for ALM control. However, growers who have trouble managing onion thrips may want to save group 28 and 30 products for thrips sprays, as both groups have season use limits. The first spray application of a material should be completed 2- 3 weeks after initial detection of ALM (either oviposition scars or the fly itself). Subsequent sprays should be completed in 1–2-week intervals. Two or three sprays should provide adequate control. As always, be sure to follow label rates and application instructions for any pesticide that you plan to use.

For more pictures and detailed information on the biology and management of ALM, Cornell has an excellent fact sheet that can be found here: https://cals.cornell.edu/integrated-pest-management/outreach-education/fact-sheets/allium-leafminer. In the meantime, feel free to reach out to us if you have any questions.

~Amanda Quadrel and Maria Cramer, Senior Program Coordinators- Vegetable IPM

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