Potato and Tomato Disease Forecasting

Growers who are interested in using disease forecasting models should chose the location from the report that is closest in proximity to their farming operation.
 
In addition, regularly check the Cornell NEWA website @http://newa.cornell.edu/ where this information is compiled from. From the NEWA site menu click on Pests Forecasts, select your weather station, and click on the specific disease, set accumulation start date, and a table of daily and total DSVs will be generated.

 

Related Websites

NEWA

Cucurbit Downy Mildew Forecasting

June 1, 2022

Kentucky’s Combine Checklist to Prevent Wheat Bin Pests

In anticipation of the beginning of combine season, please check the following  resources to minimize stored grain losses or quality deductions.

High humidity has prevailed throughout much of southern New Jersey since Mid-May with most days registering above 90 degrees relative humidity. The rain event beginning on May 27th brought and inch to two-inches of rainfall to some areas of Salem County where small grains are rapidly maturing and lanternfly nymphs in rosebeds are rapidly emerging.

Memorial Day weekend gave producers a three day window to mow, swath and rake hay for dry baling today and tomorrow before thunderstorms are forecasted. Remember, last year was a high grasshopper egg laying season. If you noticed a significant number of grass hoppers in hay swathing or wheat combining this month, be on the alert for increasing grasshopper pressure on all other crops going into the rest of the summer.

 

Kentucky Pest News:

IPM 20-point Checklist for Controlling Insects in Stored Wheat

Other resouces for producers monitoring disease at this time:

Expert Commentary by Wheat Region: This window will popup when you click on the link to the wheatscab risk site https://www.wheatscab.psu.edu/

Table 3 summarizing some observed weather conditions required for toxin production in grain crops: A great resource on grain mycotoxins.

https://www.extension.iastate.edu/grain/topics/MycotoxinsintheGrainMarket.htm

 

Filed Under: Disease Forecasting, Field, Forage & Livestock, Uncategorized, Vegetable Crops
March 28, 2022

Are you familiar with the federal soil quarantine map, associated pests of concern

During soil testing season, we often get calls about what laboratory to send samples to and what to test for. You may not know that under certain circumstances USDA-APHIS may have a quarantine for a particular plant or animal pest that can be carried in soil, and movement of soil from that region is restricted and requires a permit. This includes all territories of the United States such as Guam, Hawaii, Puerto Rico, and the U.S. Virgin Islands. APHIS also restricts the movement of domestic soil from areas within the continental United States that are under quarantine for specific plant pests and adjoining countries. For example, currently soil cannot enter the U.S.  from Canada if from the following areas of Alberta: A farm unit and associated land located near the municipality of Fort Saskatchewan; and a farm unit and associated land located near the municipality of Spruce Grove; British Colombia: That portion of the municipality of Central Saanich on Vancouver Island, ease of the west Saanich Road; Newfoundland and Labrador: The entire Island of Newfoundland; and Quebec: The municipality of Saint- Amble.

The Federal Domestic Soil Quarantines Map provides an overview of the plant pest quarantines that affect the movement of soil. USDA recently updated their Federal Domestic Soil Quarantine Map on February 10, 2022 which is available as a pdf at:

https://www.aphis.usda.gov/aphis/newsroom/stakeholder-info/stakeholder-messages/plant-health-news/federal-domestic-soil-quarantine-map-2-10-22

This map contains a lot of information that is useful for producers, growers and consumers who are purchasing plant materials that may contain soil to be mindful of the presence of significant plant pests of concern that have not yet made it to New Jersey, and to do their part to not bring them here. While many are limited to infestations along the west coast and gulf coast, others are closer to home. For example, the golden nematode is a potato nematode that is quarantined in some parts of western New York State. The pale cyst nematode is another potato nematode of concern that is quarantined from a small area of Idaho and the island of Newfoundland, Canada.

Others like the imported fire ant continue to spread and are now found in hot spots in Alabama, Arkansas, California, Florida, Georgia, Louisiana, Mississippi, New Mexico, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, Virginia, and Puerto Rico. Quarantine efforts thus far have been able to limit the spread of witchweed to locations in South and North Carolina.

If you have specific questions about bringing in soil from any of these areas denoted in this USDA soil quarantine map or about these quarantine pests, contact the USDA-APHIS NJ state office, state plant health director at (609) 259-5244 or for more contact information see https://www.aphis.usda.gov/aphis/ourfocus/planthealth/ppq-program-overview/sphd/new+jersey

 

Filed Under: Disease Forecasting, Field, Forage & Livestock, Fruit, Landscape, Nursery, & Turf, Uncategorized, Vegetable Crops
June 16, 2021

Important resources for cucurbit disease control

The cucurbit growing season is well under way in New Jersey and the rest of the mid-Atlantic region. Below are links to useful resources for the identification and management of important cucurbit diseases.

Cucurbit Powdery and Downy Mildew: A Tale of Two Pathogens

The downy mildew forecasting website

Preparing for cucurbit downy mildew

Preparing for cucurbit powdery mildew

Preparing for Anthracnose and Alternaria Leaf Blights in Cucurbit Crops

Recognizing and controlling Angular leaf spot in cucurbits

Recognizing and controlling Plectosporium blight in cucurbits

Controlling Phytophthora and Rhizoctonia root rots

Destroying cucurbit plantings after harvest

 

Filed Under: Disease Forecasting, Vegetable Crops Tagged With: , ,
February 19, 2021

Proceedings Book – Speaker Summaries for February 22-25th NJ Vegetable Meeting

Each year for the New Jersey Vegetable Meeting, Rutgers Cooperative Extension publishes a proceedings book with summaries of presentations given during the educational sessions. The 2021 proceedings book is now posted on the Rutgers Vegetable Online Resources webpage. All proceedings books dating back to 2009 are also archived on this site and can be found by scrolling down to the bottom left corner of the webpage.

The 2021 Proceedings Book is dedicated in the memory of William Roberts who passed away on May 21, 2020 at theTwo people in dress clothes age of 88. After completing his college degree at Rutgers, Bill served our country in the military until 1955 where he earned the rank of First Lieutenant. He then returned to Rutgers, Cook College, to teach and later became an Extension Specialist in Agricultural Engineering. Early in his career, he invented the air-inflated, double-layer polyethylene film system for covering the roof of a greenhouse. Today, approximately 65 percent of all commercial greenhouses in the United States use the air-inflated system. This innovation won Bill many awards and tremendous gratitude from the industry. On a personal note, Bill was most known for his tremendous faith and love for family; especially wife Dottie. For more information about Bill Roberts, please see the beginning pages of the proceedings book for 2021.

We hope you will take the time to read the summaries included in the 2021 proceedings book. Robin Brumfield, Rutgers Extension Specialist in Agricultural Economics, recommends that anyone participating in the “Know Your Numbers, Know Your Options” morning and afternoon sessions on Monday, February 22nd, utilize her proceedings summaries on pages 19-25 (morning session) and pages 42-47 (afternoon session) while attending.

Also of interest – to obtain an online copy the 2020-2021 Commercial Vegetable Production Recommendations Guide a free download is available on the Rutgers NJAES Publications website. The guide is the same as in 2020 and a “critical updates” document is also available online for changes – mainly pesticide recommendations updates.

Filed Under: Blueberry, Commercial Ag Updates, Cranberry, Disease Forecasting, Field, Forage & Livestock, Food Safety, Fruit, Organic Production, Plant Diagnostic Lab, Strawberry, Tree Fruit, Vegetable Crops, Wine Grape Tagged With: ,
September 10, 2020

Ask the Agent Fall Series

“Ask the Ag Agent” was created in spring 2020, when COVID-19 forced a new normal in communications nationwide. Rutgers Cooperative Extension Agricultural Agents working with “Ask the Ag Agent” education and outreach are committed to the agriculture industry and all interested in growing plants, raising livestock and essential resources related to agriculture. The program will now continue beginning on Wednesday, September 16th and run every-other Wednesday in September and October.

Farmers and others are welcome to join this bi-weekly teleconference each Wednesday night from 7:00pm-8:00pm. Weekly events are hosted by Rutgers Cooperative Extension Agricultural Agents working with the farming industry.

This call-in/WebEx event features updates on farm management, crop conditions, farm industry observations, agricultural agency programs and other topics discussed by farmers, agricultural agents and other agricultural service providers.

Hosted by Agricultural Agents Bill Bamka, Stephen Komar, Michelle Infante-Casella and Meredith Melendez, this bi-weekly communication provides a forum for discussion for farmers and all involved in NJ agriculture, including agricultural agency personnel, non-profit organizations and others.

This event and other events hosted by Rutgers Cooperative Extension can be found on the Rutgers NJAES Events website.

To join the “Ask the Ag Agent” forum each week on a computer/tablet/smartphone via the WebEx Videoconference use the link:

“Ask the Ag Agent” was created in spring 2020, when COVID-19 forced a new normal in communications nationwide. Rutgers Cooperative Extension Agricultural Agents working with “Ask the Ag Agent” education and outreach are committed to the agriculture industry and all interested in growing plants, raising livestock and essential resources related to agriculture. The program will now continue beginning on Wednesday, September 16th and run every-other Wednesday in September and October.

Farmers and others are welcome to join this bi-weekly teleconference each Wednesday night from 7:00pm-8:00pm. Weekly events are hosted by Rutgers Cooperative Extension Agricultural Agents working with the farming industry.

This call-in/WebEx event features updates on farm management, crop conditions, farm industry observations, agricultural agency programs and other topics discussed by farmers, agricultural agents and other agricultural service providers.

Hosted by Agricultural Agents Bill Bamka, Stephen Komar, Michelle Infante-Casella and Meredith Melendez, this bi-weekly communication provides a forum for discussion for farmers and all involved in NJ agriculture, including agricultural agency personnel, non-profit organizations and others.

This event and other events hosted by Rutgers Cooperative Extension can be found on the Rutgers NJAES Events website.

To join the “Ask the Ag Agent” forum each week on a computer/tablet/smartphone via the WebEx Videoconference click here

Join by phone
+1-650-429-3300 passcode 1202639477##

Filed Under: Commercial Ag Updates, Disease Forecasting, Field, Forage & Livestock, Food Safety, Fruit, Organic Production, Uncategorized, Vegetable Crops Tagged With: ,
June 17, 2020

Nursery update; focus on warm season spider mites

This advisory provides; (1) warm season spider mite biology and control options, (2) current growing degree-day information, and (3) a boxwood blight risk update.

Note: Previous spider mite advisories

Steve Rettke, Rutgers IPM, wrote two very good advisory posts pertaining to the different seasonal mites, in addition to symptomology and images of the different mites. He is a wealth of information and has contributed photos and will be assisting in future fact-sheets pertaining to common pests and their control. In light of these advisory posts (below) this current advisory will only cover the basics as it applies to pest control. Contact: rettke@njaes.rutgers.edu

Please review his very informative advisories:

Cool season mites: https://plant-pest-advisory.rutgers.edu/cool-season-mites-wax-as-the-warm-season-mites-wane/

Warm season mites: https://plant-pest-advisory.rutgers.edu/cool-season-mites-have-faded-but-warm-season-mites-now-surge/

Spider mite damaged tree

Cool season: Spruce spider mite damage on an Aberta Dwarf Spruce. Photo: Steven Rettke, RCE.

Plant covered in webs

Warm season: Two spotted spider mite webbing and damage. Photo: Steven Rettke, RCE.

(2) Basic spider mite biology and control options

Cool season mites: The mites affecting horticulture crop production can be broken into two functional groups; cool season and warm season. Cool season mites feed and lay eggs, as the name suggests, in cooler times of the year (late winter-early spring and then again fall-early winter depending on the year). The two most common cool season mites are the Spruce and Southern red spider mites that feed on conifers and broadleaf evergreens, respectively. In many cases the damages caused by these mites are not noticed until well into the growing season. Meaning that if damages are observed mid-season you would be better off waiting until the fall to control cool season mites, i.e. targeting late season egg hatches and developing mites.

Warm season mites: As the season progresses towards summer, the warm season mites including Two-spotted, Maple, Oak, Honey locust, European, and other host specific spider mites become active (typically June – September). The Two-spotted spider mite is known as a “cosmopolitan” pest because of its ability to colonize, and damage, a wide variety of horticulture crops (but are rarely observed on conifers). Sentinel plants would include rose, euonymus, and forsythia, as they are favorites of these mites. In contrast to the cool season mites, warm season mite damages are often visible while the pest is actively feeding and multiplying, as up to 10-15 generations per growing season can impact your crop. Warm season mites evade suffocation by dormant oil sprays and other miticide applications by leaving their feeding locations on plants once temperatures begin to drop, and overwinter in the soil horizon or leaf litter under the host plant. As warm season mites are preparing to go into dormancy they begin to change their color to an orange hue, meaning they are not feeding as readily and will not be as affected by miticides because of this.

Two spotted spider mites

Multiple life stages of Two spotted spider mites. Photo: Steven Rettke, RCE.

Two spotted spider mites

Two spotted spider mite females going into dormancy (orange coloration). Photo: Steven Rettke, RCE.

Conditions favoring spider mites: Full sun and dry, dusty conditions are often associated with increasing mite populations as low relative humidity often stimulates mite reproduction. Additionally, during periods of rain (and resulting leaf wetness-periods), certain fungi are able to attack and reduce mite populations (called entomopathogenic fungi). Meaning in frequently wet seasons mite numbers, damage, and miticide applications should be lowered due to increased fungal activity. However, this situation can certainly lead to increased plant pathogenic fungi activity as well, therefor a balance between the two is most desirable. Excessive nitrogen fertilizer has also been linked to explosive mite populations; therefor a well-planned nutritional regiment should be strictly followed.

IPM is important when suppressing spider mite populations!

Beneficials: In addition to entomopathogenic fungi (like Beauveria bassiana), numerous beneficial organisms can also manage mite populations including predacious mites (Phytoseiidae family), spider mite destroyer (Stethorus punctillim), ladybug larvae, midge larvae (Feltiella acarisuga), and minute pirate bugs. Given this complex, and many times free, natural defense system, applications of certain insecticides can actually cause mite populations to resurge by killing the mite-feeding beneficials (see note below). Therefor, all applications should be thoughtfully considered with economic (or cosmetic) thresholds in mind.

Compounds that can cause spider mite resurgence:

  • Carbaryl (Sevin)
  • Cyfluthrin containing compounds (Tempo, Decathalon, Scimitar)
  • Permethrin (Astro)
  • Imdacloprid (Merit, Marathon)

Warm season spider mite treatment options:

ROTATE between Insecticide Resistance Action Committee (IRAC #)

Format: [IRAC Group #]: Chemical name (Trade names)

  • [3A]: Pyrethrins (Tersus)
  • [5]: Spinosad (Conserve, Entrust)
  • [6]: Abamectin (Avid, Lucid, Aracinate TM)
  • [20D]: Bifenazate (Floramite SC)
  • [10A]: Hexythiazox (Hexygon)
  • [21A]: Pyridaben (Sanmite, Sanmite SC)
  • [21A]: Fenazaquin (Magus)
  • [23]: Spiromesifen (Forbid 4F, Judo)

“Softer” spider mite materials

  • Agitator (forces mites out of hiding): Captiva
  • Azadirachtin from the Neem plant: (Azatrol EC)
  • Beauveria bassiana: (Naturalis-L)
  • Horticulture oil: (@ 1-2% vol:vol summer applications)
  • Insecticidal soaps: (M-Pede)

Always refer to the label for allowable host crops, use-restrictions, application rates, reapplication intervals, REI times, and mix compatibility information.

NOTE: Production and pesticide information on this site are for commercial operators only and are NOT for home gardener use. Provided materials represent examples and do not cover all possible control scenarios. Please contact your local agent or chemical sales representative for more information.   

(2) Growing Degree-days as of 6/16/2020 (if you need help please contact me at twaller@njaes.rutgers.edu)

Upper Deerfield (NJ50)= 809 GDD50 Howell/Freehold (NJ10) = 628 GDD50 Pequest (NJ58) = 525 GDD50

Growing degree day map for our area: (courtesy of Cornell University; Fore Cast)

Growing degree-day map for Northeastern US

Growing degree-day map for our area. Cornell, Fore Cast.

(3) Boxwood blight risk update

Boxwood Blight Risk Model
Date Upper Deerfield (NJ50) Howell (NJ10) Pequest (NJ58)
6/14/20 Sun Very low risk Very low risk Very low risk
6/15/20 M Very low risk Very low risk Very low risk
6/16/20 T Very low risk Very low risk Very low risk
6/17/20 W Very low risk Very low risk Very low risk
6/18/20 Th Low risk Low risk Low risk
6/19/20 F Infection potential Infection potential Low risk
6/20/20 S Low risk Infection potential Low risk
6/21/20 Sun Very low risk Low risk Very low risk
Risk of infection
adapted from: https://uspest.org/risk/boxwood_app

Please visit this website (there is a mobile app as well): https://uspest.org/risk/boxwood_app

Protective fungicide applications should remain in effect or be initiated immediately for Boxwood Blight. The disease may be sporulating and spreading amongst plantings if present (or may come into your nursery via shipments) within the next few days. Please continue preventative/protectant fungicide applications utilizing; chlorothalonil (FRAC Group M05), mancozeb (FRAC Group M03), and QoI-fungicides (FRAC Group 11) in a rotation (other materials available as well).

NJAES; Plant Diagnostic Lab https://njaes.rutgers.edu/plant-diagnostic-lab/

 

*Additional links and resources*

Please take the 2020 Nursery Industry Survey: https://forms.gle/dUjLxaiu6qDQYYsRA

Ask the Agent (every Wednesday @ 7:00pm): : https://go.rutgers.edu/t7wjkit1

NJNLA- Wine Down Wednesdays (every first and third Wednesday @ 7:00pm-8:00pm).

Email: Lori Jenssen @ njnla.director@gmail.com

Subscribe to the NJAES YouTube webpage: https://www.youtube.com/user/RutgersNJAES/

RU Sustainable Nursery Production website: https://njaes.rutgers.edu/nursery/

March meeting PDF: https://njaes.rutgers.edu/nursery/documents/2020%20SJ%20Nursery%20Meeting%20Proceedings.pdf

How to use growing degree-day resources: https://plant-pest-advisory.rutgers.edu/using-growing-degree-day-calculators-nursery-pest-and-pathogen-updates-important-resource-links/

2017 Southeastern U.S. Pest Control Guide for Nursery Crops and Landscape Plantings: https://content.ces.ncsu.edu/southeastern-us-pest-control-guide-for-nursery-crops-and-landscape-plantings 

Rutgers Insect Control Recs. for Shade Trees and Commercial Nursery Crops: https://njaes.rutgers.edu/pubs/publication.php?pid=E334

NJAES; Soil Testing Lab: https://njaes.rutgers.edu/soil-testing-lab/

 

Thank you,
Cumberland County Extension: Timothy J. Waller, Ph.D. @ twaller@njaes.rutgers.edu

Filed Under: Disease Forecasting, Landscape, Nursery, & Turf, Nursery, Plant Diagnostic Lab, Turf