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.

Controlling white mold in spring crops

White mold, or lettuce drop, caused by Sclerotinia sclerotiorum, can cause serious losses in lettuce and other susceptible crops if left uncontrolled. Disease development is favored by wet, humid conditions (especially in high tunnels and fields) with known histories of the disease.

WhiteMold

White mold on lettuce. Notice the white fungal growth and black sclerotia developing on the base of the stem. The sclorotia can survive in the soil for up to 10 years.

[Read more…]

Damping-off: Identifying and Controlling Early-Season Damping-off Pathogens

It is extremely important to know which pathogen is causing damping-off problems and which fungicide to properly apply. The key to controlling damping-off is being proactive instead of reactive. Always refer to the fungicide label for crop use, pathogens controlled, and application rates.

Damping-off is caused by a number of important vegetable pathogens and is very common during the spring. Damping-off can kill seedlings before they break the soil line (pre-emergent damping-off) or kill seedlings soon after they emerge (post-emergent damping-off). Common pathogens that cause damping-off include Pythium, Phytophthora, Rhizoctonia and Fusarium spp.

Control of damping-off depends on a number of factors. First, is recognizing the conditions which may be leading to the problem (i.e., weather/greenhouse growing conditions) and second, identifying the pathogen causing the problem.

Conditions Favoring Damping-off

Although all four pathogens are associated with damping-off, the conditions which favor their development are very different. In general, Phytophthora and Pythium are more likely to cause damping-off in cool, wet or overwatered soils that aren’t allowed to dry out due to cloudy weather or cooler temperatures. Conversely, Rhizoctonia and Fusarium are more likely to cause damping-off under warmer, drier conditions especially if plug trays are kept on the dry side to help reduce transplant growth. [Read more…]

Organic Transplant Production: Suppressing Soil-borne Pathogens – A reminder

Pathogens such as Fusarium, Pythium, Phytophthora, Thielaviopsis and Rhizoctonia that cause pre- and post-emergent damping-off can cause serious problems in organic (and conventional) transplant production. The key to controlling and/or suppressing damping-off pathogens with biological controls is keeping the biological populations high and continually present on root surfaces of the host, and by following good cultural practices. [Read more…]

Controlling Spring Diseases in Asparagus

Asparagus season is just around the corner and now is a good time to review important diseases.

Wet soil conditions are ideal for Phytophthora and Pythium development. To help reduce potential losses, especially in fields with low spots or fields that are poorly drained soils, or more importantly, in fields with a history of either disease apply Orondis Gold (oxathiapiprolin + mefenoxam (FRAC groups 49 + 4) at 4.8 to 9.6 fl oz/A, Ridomil Gold 4SL (mefenoxam, 4) at 1.0 pt/A, or Ultra Flourish 2E/A (mefenoxam, 4) at 2.0 pt/A, or MetaStar 2E (metalaxyl, 4) at 2.0 qt/A over beds just before first harvest. For new plantings, apply the same after planting or after crown covering. Do not apply Orondis Gold, Ridomil, Ultra Flourish, or MetaStar one day prior to harvest or illegal residues may result. [Read more…]

Coronavirus Education Materials In Indigenous Languages, Dialects and Spanish

Our colleague, Gene McAvoy of Florida Cooperative Extension (a Rutgers grad and currently president of our National Assoc of County Ag Agents) shared this reference that you might find useful.

These resources were gathered by the Rural Women’s Health Project, with thanks to
Evelyn Moraga in Guatemala, Dr. Laura Gonzalez at the University of Florida, her
colleagues at CEPIADET in Oaxaca Mexico and CIELO in Los Angeles. They are committed to getting these materials out to all of those residing in the U.S., no matter their country of origin or mother language. If ou have materials to be added to this list, please contact us at: rwhp@cafl.com.

Together, we will get through this.

Farms Are Considered Essential During The Virus Outbreak

Wes Kline and I have been fielding questions about whether farms will be closed down. Our answer is, “NO!” for the following reasons.

Agricultural is considered an essential industry by the state and federal governments.  Agricultural workers are also considered essential. Your workers should not have an issue going to work. What you need to do is train your workers on proper hand washing and try to give as much space between workers as possible. Remember 6 ft between individuals should be maintained where practical. The New Jersey Department of Agriculture has the latest information from the state at https://www.nj.gov/agriculture/. Our https://onfarmfoodsafety.rutgers.edu/ website has a series of factsheets and articles related to agriculture, including many in Spanish. This website is updated regularly so check to see what is new.  Remember: 

  • Agricultural operations are considered essential. 
  • Farmer’s markets are specifically exempt from being closed in the executive order.
  • Nurseries and greenhouses can operate.  

What should an operation do to protect their workers and themselves? 

  1. Repeated handwashing for 20 sec. This means as soon as people report to work, when they take breaks, when they use bathroom facilities, etc. This is not a time to make fun of handwashing – promote it!  Hand sanitizers can be used if hands are not soiled. The better option is to wash hands then apply hand sanitizers. The sanitizer should be at least 60% alcohol. 
  2. If you have more than one crew keep them separated. Have them work separately, take breaks separately and eat separately. Do not mix a crew once they are working together. If in a packinghouse clean and sanitize all equipment between each crew. 
  3. Clean and sanitize break and eating areas before being occupied and before each time they are used. 
  4. Space everyone 6 feet apart or as far as possible. This is difficult if a crew is riding a transplanter but do the best you can. Social distancing inside a labor camp with a common bunk room may be a challenge. Consider installing temporary/permanent screens/walls between bunks, separating bunks as far as space allows, or divide bunks into individual beds if practical/possible. 
  5. If workers wear gloves, they must be single use and replaced frequently. 
  6. What about masks?  Cloth masks are acceptable, but they should be laundered daily.  If masks are purchased, they should be replaced at least daily and more frequently if dirty. 
  7. Should worker’s temperatures be taken at the beginning of the day?  No, this is not recommended unless medical personnel carry out the operation.  You need to know what the reading means, that the correct thermometer was used, etc.  

Lead by example – Farm owners and supervisors must do the same thing that you expect your workers to do!