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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NJ Commercial Vegetable Production Recommendations

Rutgers Weather Forecasting - Meteorological Information important to commercial agriculture.

Early-season Pythium and Phytophthora Control in Pepper and Tomato Crops

“What should I do to help prevent Pythium and Phytophthora in my pepper and tomato crops early in the season?” is a question most often asked this time of year. In the past, the answer was simple. Apply mefenoxam (Ridomil Gold SL, Ultra Flourish, 4) or metalaxyl (MetaStar, 4). Problem solved, right?

Not exactly, with resistance development in Phytophthora (P. capsici) to both mefenoxam and metalaxyl, the correct answer isn’t as simple anymore. It’s important to remember that both chemistries will work very well as long as resistance hasn’t been detected on your farm. How do you know if you have resistance? The easiest way is to follow efficacy. [Read more…]

Commercial Vegetable Twilight Meeting April 23, 2015

The Rutgers Cooperative Extension Agricultural Agents of Atlantic, Cumberland and Gloucester Counties invite you to the first commercial vegetable twilight meeting of the 2015 season to discuss early spring crop pest control, label updates and management topics. Feel free to bring plant, insect, disease, or weed samples to the meeting to have them identified, or perhaps you can stump the experts. Please bring samples in sealed plastic bags.
Pesticide Recertification Credits have been requested for this meeting.

Date: Thursday, April 23, 2015 7:00 p.m. – 9:00 p.m.
Location: East Vineland Fire Hall, Landis Ave. across from the Savoy Restaurant
(park behind the building and enter conference room door in rear)

Agenda

  • 7:00pm Weed Control – Review of the Basics
    –Rick VanVranken, RCE Atlantic
  • 7:30pm Economic Benefits of Maintaining Native Pollinator Habitat
    –Elizabeth Schuster, Environmental Economist, The Nature Conservancy
  • 7:50pm NRCS Programs Supporting IPM/Organic Transition/Pollinator Habitat
    –Nicholas Saumweber, District Conservationist, NRCS
  • 8:10pm Early Season Insect Pests and Insecticide Updates
    –Joe Mahar, Vegetable IPM Coordinator
  • 8:30pm Vegetable Disease Control Options for Spring Crops
    –Dr. Andy Wyenandt, RAREC
  • 9:00pm Pesticide Regs & Worker Protection Standards Update for the Coming Season
    –Michelle Infante-Casella, RCE Gloucester
  • 9:30pm Questions & Answers

Plastic Pesticide Container Recycling Dates

The NJ Dept. of Ag, Helena Chemical, Allied Recycling, and the Cumberland County Solid Waste Complex are offering dates for free plastic pesticide container recycling disposal. These are offered to agricultural, professional and commercial applicators holding a NJDEP Pesticide Applicators License. State, county and municipal government agencies may also participate.

Dates and locations are listed below.

Questions? Contact:
Roberta C. Lang
New Jersey Department of Agriculture
Division of Agricultural and Natural Resources
Phone: 609.292.2242
Fax: 609.633.7229
[Read more…]

Confidence at your Fingertips:
Vegetable Production Recommendations

The new 2015 Commercial Vegetable Production Recommendations guide is now available.

Every year horticulturists, plant pathologists, entomologists and weed specialists from Penn State University, Rutgers, University of Delaware, Virginia Tech, University of Maryland and West Virginia University meet to discuss what changes should be made to the guide based on new research results and changes in the vegetable industry.     ~Elsa Sanchez, PSU

At NJAES, we are proud collaborators in the pursuit of evidence-based, environmentally-sound agricultural practices. We sometimes refer to the Recommendations as the $50-million growers guide because of the cumulative effort, scientific wisdom, and practical experience found within its pages; make no mistake, its a stunning return on investment for anyone who grows or eats vegetables in the mid-Atlantic states (Rabin did the math).

The guide is available online @ Rutgers NJAES | Commercial Vegetable Production Recommendations

For a hardcopy of the guide:

Greenhouse Disease Management: Seed Treatment

Seed treatment and selected fungicides and bactericides labeled for greenhouse use tables can be found in the 2015 Commercial Vegetable Production Recommendations guide.

Hot Water Seed Treatment Photo: Meg McGrath, Cornell

Hot Water Seed Treatment
Photo: Meg McGrath, Cornell

All seed used in transplant production, as well as any transplants brought into the greenhouse should be certified ‘clean’ or disease-free. Important diseases such as Bacterial leaf spot of tomato and pepper can cause major problems in transplant production if introduced in the greenhouse. Bacterial leaf spot of tomato and pepper can be seed-borne and infested seed can be a major source of inoculum in the greenhouse and cause problems in the field later in the growing season.

As a rule for any crop, any non-certified or untreated seed should be treated, if applicable, with a Clorox treatment, or hot-water seed treatment, or dusted to help minimize bacterial or damping-off diseases.

For more information on seed treatments for specific crops please see Table E-14 on page E45 in Section E of the 2015 New Jersey Commercial Vegetable Production Recommendations Guide.
An updated table for selected fungicides and bactericides labeled for greenhouse use is available in Section E of the 2015 recommendations guide. The table includes a comprehensive list of fungicides and biological agents approved for greenhouse use. Table E-15 can be found on pages E46-48.

Greenhouse Disease Management: Transplant Production

Proper greenhouse sanitation is important for healthy, disease-free vegetable transplant production. Efforts need to be made to keep transplant production greenhouses free of unnecessary plant debris and weeds which may harbor insect pests and disease.

  • All equipment, benches, flats, plug trays and floors should be properly cleaned and then disinfested prior to use and efforts need to be taken throughout the transplant production season to minimize potential problems.
  • Any weeds in or around the greenhouse structure should be removed prior to any production.
  • Any transplant brought into the greenhouse from an outside source needs to be certified ‘clean’, as well as visually inspected for potential insects and diseases once it reaches your location.

Remember, disinfestants, such as Clorox, Green-Shield, or hydrogen dioxide products (Zerotol – for commercial greenhouses, garden centers and Oxidate – commercial greenhouse and field), kill only what they come into direct contact with so thorough coverage and/or soaking is necessary. The labels do not specify time intervals for specific uses, only to state that surfaces be ‘thoroughly wetted’. Therefore, labels need to be followed precisely for different use patterns (i.e., disinfesting flats vs. floors or benches) to ensure proper dilution ratios. Hydrogen dioxide products work best when diluted with water containing little or no organic matter and in water with a neutral pH.