The New York Center for Agricultural Medicine & Health/Northeast Center for Occupational Health and Safety in Agriculture, Forestry, and Fishing based in Cooperstown, NY is conducting a farm worker health needs assessment to help them better address worker health and safety needs during the COVID-19 pandemic. [Read more…]
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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July 22, 2020 Kris Holmstrom and Joe Ingerson-Mahar
Vegetable IPM Update 7/22/20
Sweet Corn
European corn borer (ECB) adults continue to be very low, and no map will appear in this edition.
The highest nightly trap catches of ECB for the week ending 7/22/20 are as follows:
| Allamuchy 1 | Crosswicks 1 |
| Denville 1 | |
| Cinnaminson 1 | Downer 1 |
Fall armyworm (FAW) larval infestations are light and widely scattered. This is the time of the summer when FAW can show up, resulting in significant injury to whorl and even seedling stage corn. Injury from newly hatched larvae shows up as “window panes” or areas where leaf tissue has been eaten down the the lower epidermis (see photo at left). This injury leads down into the whorl. As larvae gain size, they begin to consume leaf tissue in its’ entirety, creating ragged holes and lots of droppings (see photo at right). FAW can be tough to manage because it is resistant to synthetic pyrethroid insecticides (IRAC 3A) and because larvae are often covered by their own droppings, making contact with the insecticide more difficult. Treat when 12% or more plants exhibit FAW injury alone, or in combination with ECB injury.
Corn earworm (CEW) moth captures increased in blacklight traps this past week. Although the increased numbers do not represent a large influx, they do pose an elevated risk to silking corn. Blacklight catches were highest overall along the Delaware Bay (see map at left), with blue areas on this map representing a 4-5 day spray schedule.
The highest nightly trap catches of CEW in black light traps for the week ending 7/22/20 are as follows:
| Centerton 2 | Cinnaminson 1 | New Egypt 1 |
| Allamuchy 1 | East Vineland 1 | Old Bridge 1 |
| Bellemeade 1 | Elm 1 | Pedricktown 1 |
| Cedarville 1 | Jones Island 1 | Springdale 1 |
July 21, 2020 Rick VanVranken
Don’t Let Your Guard Down With Farm Worker Health
The COVID-19 pandemic has highlighted the critical, indeed essential, role of farm labor in getting food from farm to plate. However, health concerns should not stop with a negative COVID test, especially if an employee or family member is exhibiting any of the ‘flu-like’ symptoms that are associated with corona virus.
A recent farm call was a reminder that working outside, especially during this July heat wave, exposes workers to a number of potential health risks that may present very similar symptoms and can be equally health, and even life, threatening. Recently published studies from the Rutgers Institute of Earth, Ocean, and Atmospheric Sciences suggest growing numbers of people worldwide are at risk of heat stress and related complications, including farmers and ag laborers working in high heat and humid conditions.
Harvesting and other activities along field edges, including going into the woods instead of using a portable bathroom facilities, also lead to a high risk of tick bites, which can also carry a number of diseases, many as or more debilitating than Lyme disease that most are now aware of. A recent story at Today.com suggested that the COVID-19 pandemic might lead to more tick-borne disease this year, quoting Rutgers entomologist and assistant professor Alvaro Toledo at the Center for Vector Biology with suggestions how to prevent tick bites.
It is critical for your employees’ health and well-being to get proper diagnosis and treatment for all of these ailments. This table illustrates how many tick-born diseases, as well as heat stress, all have potential symptoms very similar to those of COVID-19. Each is linked to additional resources at the CDC. In many cases, it may be the ‘other symptoms’ that may be unique to each disease and assist a medical practitioner with correct identification and lead to better verification with further testing.
|
Disease > Symptoms v |
COVID-19 | Heat Stress | Lyme Disease | Ehrlichiosis | Babe- biosis | Powas-san | Rocky Mtn Spotted Fever |
| Vector* | Human | Black-legged Tick (a.k.a. Deer Tick) (I. scapularis) | Lone Star Tick (A. americanum) & Black-legged | Black-legged Tick | Ground hog(I. cookei), Squirrel (I. marxi) & Black-legged Ticks | American Dog Tick (D. variabilis) | |
| Fever or chills | X | X | X | X | X | X | X |
| Cough | X | X | |||||
| Shortness of breath/difficulty breathing | X | ||||||
| Fatigue | X | X | X | X | |||
| Muscle/body aches | X | X | X | X | X | X | |
| Headache | X | X | X | X | X | X | X |
| New loss of taste or smell | X | ||||||
| Sore throat | X | ||||||
| Congestion or runny nose | X | ||||||
| Nausea/vomiting | X | X | X | X | X | X | X |
| Diarrhea | X | X | |||||
| Rash | X | X | X | ||||
| Other symptoms | X | X | X | X | X | X | |
| Potentially Deadly/Disabling |
X | X | X | X | X | X | X |
*NOTE – main vector listed, but many tick born diseases may be vectored by other species of ticks, or different species causing same disease may be carried by different tick species.
July 20, 2020 Andy Wyenandt
Destroying cucurbit plantings after harvesting is a must to help mitigate downy mildew
It’s a little early in the season but now is a good time to start thinking about ways to help mitigate cucurbit downy mildew pressure later on. All cucurbit fields, especially cucumber and other summer squash fields should be destroyed immediately after the last harvest to help limit potential inoculum sources for cucurbit downy mildew. For a review of CDM control please click here. To track the progress of CDM on your phone or PC please visit the CDM forecasting website.
July 20, 2020 Nick Polanin
Make Sure Your Farm or Ranch Counts – And is Counted!
Did you know that according to the 2019 State Agriculture Overview for NJ, 3,900 acres of peaches yielded 5/tons per acre at a value of over $25.6 million dollars? Or that 3,500 acres of peppers were harvested in 2019, with a value of $45.8 million dollars? Or that 9,300 acres of harvested blueberries were valued at $85.3 million dollars in 2019? And in 2018, NJ ranked 4th nationwide in cranberry and peach production, and third in bell peppers?
July 17, 2020 Andy Wyenandt
Vegetable Disease Update – 7/17/20
- Cucurbit downy mildew has been reported on cucumber in southern New Jersey. This is the first report in the state this growing season. There have been no reports of CDM in other cucurbit crops in the region to date. For a review of CDM control please click here. To track the progress of CDM on your phone or PC please visit the CDM forecasting website.
- Cucurbit powdery mildew (CPM) season is here. For a review of CPM control strategies please click here.
- All cucurbit plantings that are no longer in production should be destroyed immediately after the last harvest by mowing or with herbicide to reduce the risk of harboring of CDM, CPM, and virus.
- Virus has been reported in summer squash plantings.
- Pepper anthracnose has been reported in southern New Jersey and is a serious problem in all bell and non-bell peppers, especially in fields with a history of the disease. For more information on controlling pepper anthracnose please click here.
- No reports of Late blight in region. To track the progress of Late blight in the US please click here.
- Collar rot caused by Alternaria has been reported again in tomato this week in New Jersey. It is the same pathogen that causes Early blight in tomato. Tomato growers who have not switched to more specific fungicides for Early blight and anthracnose fruit rot control should consider doing so. For more information from NCSU please click here.
- Heavy infections of Angular leaf spot have been reported in summer squash this week. Look for angular lesions delimited by leaf veins and ‘shotholes’ in infected leaves that develop after periods of hot, dry weather.
- Aerial stem rot has been reported on potato in southern New Jersey. The pathogen is an opportunistic bacterium in the field which infects vines that have been damaged by wind and heavy rains.
- There have been a few reports of Southern blight (Sclerotinia rolfsii) on tomato and pepper. Southern blight is much more common in vegetable areas south of the state where summer temperatures remain hotter (above 90°F) for longer periods of time. Like white mold, caused by Sclerotinia sclerotiorum, it can survive in the soil for many years. Symptoms of Southern blight include infection at the base of the stem at the soil-line. The resulting infection will girdle the plant causing wilt and death. The fungus will produce white, cottony mycelium and very small, spherical sclerotia which are often have a white to tannish, brown color as they mature. For more information on Southern blight from NCSU please click here.
- Rhizoctonia root and crown rot has been reported on sugar beet in southern New Jersey. For more information from the University of Idaho please click here.
- Bacterial leaf spot has been reported in pepper. For more information on BLS and copper resistance please click here.
- Phytophthora blight has been reported in pepper and cucurbit crops. For more information please click here.
- Basil downy mildew (BDM) has been reported in southern New Jersey on BDM susceptible sweet basil. All growers are encouraged to initiate preventative fungicide programs on DMR and non-DMR basil. For control options and to follow the progress of BDM in the US on your phone or PC please click here.
- Downy mildew has been reported in kale seedlings in a hydroponic greenhouse in PA. As a note, kale and related crops should be scouted on a regular basis. For more information on downy mildew in brassica crops from UMASS-Amherst please click here.
- Bacterial canker has been reported in fresh-market tomato. For a review of bacterial canker in tomato please see report by Dr. Sally Miller at The Ohio State University by clicking here.
- Diplodia leaf streak, a fungal disease, was identified in sweet corn this past week. Symptoms include the development of numerous pycnidia which produce conidia within the lesions on infected corn leaves. For nice reviews, please see report by Dr. Kiersten Wise and colleagues from the University of Kentucky and report by Dr. Steve Johnson at the University of Maine.
- White mold, caused by Stromatina cepivorum, has been reported in garlic. For more information, please see report by Crystal Stewart and Frank Hay from Cornell University.
- Bacterial leaf spot has been reported in sweet basil. BLS of sweet basil is a relatively new disease of basil in the US. The bacterium has a large host range and can survive and overwinter in the soil on infested plant debris. Disease development is favored by hot, humid, rainy weather. Periods of hot, dry weather will help mitigate disease development.
- With the on and off again heavy rains we have been getting, along with warmer weather, all growers should consider applying at-transplanting fungicides for root rot control. Please click here to see these articles.
- For a quick review on managing fungicide resistance development using tank mixes and fungicide rotations, and information on FRAC group 4, FRAC group 7, and FRAC group 3 and FRAC group 11 fungicides please click on hyperlinks.
- For more information on the control of the diseases mentioned above please see The 2020/2021 Commercial Vegetable Production Recommendations Guide which is available for free online! With many county offices running reduced hours or being closed this is the easiest way to obtain the newest recommendations.
