May 18, 2021

It is time to put Bagworms on your radar in Southern NJ

Bagworms

Photo: Rich Buckley

Bagworms should begin hatching in the next 2-6 weeks throughout NJ, starting in the southern regions. Now is an optimal time to get this pest on your radar and prepare materials or approaches to attack first/second instar caterpillars. The control window for this pest is typically between 600-900 GDD50 (growing degree-days) and treatments should be in use prior to their mobile, airborne, “ballooning” phase. Check that the eggs have hatched prior to application of pesticides – as most compounds will not be effective at all if the first instar caterpillars are not present. Lethal pesticide doses are important, as sub-lethal doses can trigger early pupation, making the pest all but invincible to chemical or biological treatments.

 

Bagworm management – mechanical: If eggs have not hatched: hand-remove sacs/bags. Typically female/egg filled sacs are higher in the canopy so keep that in mind while scouting.

Treatment options for Lepidoptera (caterpillars) to have at the ready – containing: B.t. (Bacillus thuringiensis)(Dipel), spinosad (Entrust SC), bifenthrin (Talstar, UP-Star), cyfluthrin (Decathlon 20WP), carbaryl (Sevin SL), chlorantraniliprole (Acelepryn), cyclaniliprole (Sarisa), cyclaniliprole + flonicamid  (Pradia), Lambda-cyhalothrin (Scimitar GC), cyantraniliprole (Mainspring), Indoxacarb(Provaunt)

IT IS CRITICAL TO ROTATE AS MUCH AS POSSIBLE BETWEEN IRAC GROUPS DUE TO THE NUMBER OF POTENTIAL APPLICATIONS

DISCLAIMER: The label is the law, always refer to it for allowable host crops, use-restrictions, application rates, reapplication intervals, re-entry intervals (REI), and mix compatibility information. Production and pesticide information on this site are for private/commercial pesticide applicators and landscape professionals only, and are NOT for home gardener use. Provided materials represent examples and do not cover all possible control scenarios. Trade-names listed do not imply endorsement and are used as examples only. Please contact your local agent or chemical sales representative for more information or to discuss additional pest management options.

More information on Bagworms:

Steve Rettke’s 2020 PPA Post – Bagworm caterpillars have hatched throughout most of NJ

RU Bagworm FactSheet 

Bagworms on Ornamental Landscape Plants

 

Photo Credits: Rich Buckley (Plant Diagnostics Laboratory) https://njaes.rutgers.edu/plant-diagnostic-lab/

 

 

Filed Under: Landscape, Nursery, & Turf, Nursery, Turf, Uncategorized Tagged With: , , , , ,
April 26, 2021

IMPORTANT NOTICE – Considerations for systemic and contact material control of Redheaded Flea Beetle – now

If you are unfamiliar with this pest

*****Please take this 5-minute survey pertaining to your concerns with Redheaded flea beetles in NJ (click here)***** 

If you are interested in donating infested plant material or conducting on-farm RHFB research. Please contact twaller@njaes.rutger.edu (856-451-2800 ext.1)

Redheaded Flea Beetle (RHFB) Considerations

Ideally when controlling high-density populations of RHFB, fall applications of long-lasting systemic materials can provide a strong knock-down of larvae populations destined to emerge in the following spring. Establishing a reserve of systemic materials in the soil and root zone late-season or early this season will greatly increase control efforts made later and can reduce the number of overall applications made specifically for RHFB.  A two-pronged approach of systemic and contact insecticides can manage active adults and larvae throughout the season.  For current season control: systemic insecticide drench or ‘sprench’ (*consider backpack units) near planting / potting-up, or a month prior to adult emergence (now for southern NJ), will provide the reserve of systemic activity required to reduce larvae and adult populations later. Contact material applications should also be considered for adult and larval treatments but must be made at sufficient volumes to guarantee ‘contact’. Contact-only driven spray regimes can provide good results, however the need to protect new growth will be ever present. When choosing materials, also consider the other pests targeted by that compound to maximize the value of your investment. Targeting the larval stage will reduce the number of adults present to lay the next generation of eggs.

Timeline for New Jersey growers and landscape professionals 

  • NOTE: Calendar date predictions based on USPEST.ORG using weather-stations for Upper Deerfield (NJ50), Howell/Freehold (NJ10), and High Point (NJ59). These are predictions and scouting should commence at least 2 weeks prior to listed dates
Projected GDD50 accumulation as of 4/26/2021
Region Location 26-Apr 1-May 1-Jun 1-Jul Aug. 1st
Southern Upper Deerfield (NJ50) 163 231 638 1315 2158
Central Howell / Freehold (NJ10) 110 166 514 1135 1929
Northern High Point (NJ59) 61 99 313 765 1327
Forecast: NOAA NCEP Coupled Forecast System model version 2 (CFSv2) forecast system (3.5 months) (USPEST.ORG)

 

Redheaded flea beetle – life stage predictions for South, Central, and Northern New Jersey with material considerations
TARGET RANGE TARGET RANGE Upper Deerfield (NJ50) Howell (NJ10) High Point (NJ59)
Growth Stage Gen. GDD50 LOW GDD50 HIGH LOW (DATE) HIGH (DATE) LOW (DATE) HIGH (DATE) LOW (DATE) HIGH (DATE)
Egg hatch – larvae 1st 242 600 2-May 29-May 10-May 6-Jun 24-May 21-Jun
Adults                            (feeding / laying eggs) 1st 517 1028 24-May 20-Jun 1-Jun 27-Jun 16-Jun 14-Jul
POTENTIAL OVERLAP OF GENERATIONS / STAGES
Egg hatch – larvae 2nd 1570 1860 10-Jul 21-Jul 17-Jul 29-Jul 11-Aug 27-Aug
Adults                            (feeding / laying eggs) 2nd 1878 2318 22-Jul 7-Aug 30-Jul 16-Aug 28-Aug 1-Oct

Note: Updated 4/26/2021 – Estimated using USPEST.org, 3.5-month CFSv2 based seasonal climate forecast, simple average growing degree-days, min temp: 50F, max temp: 95F. Growing degree-day ranges based on Dr. Kunkel’s work out of the University of Delaware. 

  • 1st generation larvae: 242-600 GDD50 
    • Observation of larval activity on the outside of root balls occurs during this timeframe, meaning they may be active earlier
    • Systemic treatments should be initiated late fall or immediately on susceptible hosts (southern NJ)to guard plants from adult feeding later this season.
      • Materials containing neonicotinoids [4A] and cyantraniliprole [28] (Mainspring) are considered particularly fast and effective, however lack the staying power of similar chemistries such as Chlorantraniliprole [28] (Acelepryn) that takes longer to translocate from soil reserves.
      • Organophosphates (1B) Acephate (Orthene, Acephate 97UP) are also a systemic options.
    • During larval development contact materials containing bifenthrin, azadirachtin, tolfenpyrad, cyclaniliprole + flonicamid, entomopathogenic fungi (Beauveria bassiana) or beneficial nematodes should be seriously considered when attempting to knock-down forthcoming adult populations.
  • 1st generation adults: 517-1028 GDD50 
    • Feeding damages will be apparent on susceptible hosts, scout to determine best time of day for applications, materials such as Captiva Prime or another agitator may be useful in driving the beetles out of hiding (which they do EXTREMELY well).
    • Continuation of systemic materials, use contact materials to directly target the adults.
    • Keep weed populations to a minimum, adults may feed on nearby weed species such as dog fennel, pigweed, and knotweed, thus avoiding pest control efforts on susceptible crops
  • 2nd gen. larvae: 1570-1860 GDD50
    • Potential for considerable overlap of larval-adult developmental stages
    • Continuation of systemic materials, use contact materials to directly target the larvae and adults.
  • 2nd gen. adults: 1878-2318 GDD50
    • Continuation of systemic materials, use contact materials to directly target the larvae and adults.
    • Keep weed populations to a minimum
  • A third generation is suspected to be possible in the southern and central regions of New Jersey

IT IS CRITICAL TO ROTATE AS MUCH AS POSSIBLE BETWEEN IRAC GROUPS DUE TO THE NUMBER OF POTENTIAL APPLICATIONS

DISCLAIMER: The label is the law, always refer to it for allowable host crops, use-restrictions, application rates, reapplication intervals, re-entry intervals (REI), and mix compatibility information. Production and pesticide information on this site are for private/commercial pesticide applicators and landscape professionals only, and are NOT for home gardener use. Provided materials represent examples and do not cover all possible control scenarios. Trade-names listed do not imply endorsement and are used as examples only. Please contact your local agent or chemical sales representative for more information or to discuss additional pest management options.

Boxwood Blight risk model update (4/26 – 5/1) 

Boxwood Blight Risk Assessment as of 4/26/2021
Region Location CODE 26-Apr 27-Apr 28-Apr 29-Apr 30-Apr 1-May
Southern Upper Deerfield NJ50 Very Low  Very Low  Very Low  Very Low  Very Low  Very Low 
Central Howell / Freehold NJ10 Very Low  Very Low  Very Low  Very Low  Low  Very Low 
Northern High Point NJ59 Very Low  Very Low  Very Low  Low  Low  Very Low 
Please check your local boxwood blight risk here (click here)  

 

*****Please take this 5-minute survey pertaining to your concerns with Redheaded flea beetles in NJ (click here)***** 

Please contact Tim Waller – Cumberland Co. – RCE for more information – twaller@njaes.rutgers.edu – 856-451-2800 ext. 1

Filed Under: Landscape, Nursery, & Turf, Nursery, Turf Tagged With: , , , , , , , , , , , , ,
April 15, 2021

Nursery and Landscape Pest Scouting Guide: 150-250 Growing Degree-days and Boxwood Blight Risk ( currently = low risk )

Nursery and Landscape Pest Scouting Guide 150-250 GDD50:

Please print or download these resources (click on them): 

Remember:

  • To determine your local growing degree-days, please review this post “Obtaining your local growing degree-day information”
  • The information provided in the downloads gives scouting GDD50 ranges (in growing degree days, base 50F) for specific insect pests harming nursery crop production and maintenance. It is important to note that these GDD50 are not exact, rather provide a range of GDD and subsequent calendar dates that can be used to scout for, and treat for, insect pests.
  • This document supports scouting, it does not replace it. Keeping good notes on pest development will help dial in scouting and treatment efforts at your local level.
  • Forecasting predictions (GDD50 accumulation) for calendar dates of multiple regions of New Jersey (S,N,C) are provided.
  • If you need more information, OR you are regularly seeing specific pest development stages at growing degree-days different than those listed here, please contact Tim Waller at twaller@njaes.rutgers.edu

GREAT RESOURCE from Steve Rettke: “Landscape Pest Notes: Some Early Spring Insects/Mites”

 

Projected GDD50 accumulation as of 4/15/2021
Region Location 4/15/21 1-Apr 1-May 1-Jun 1-Jul Aug. 1st
Southern Upper Deerfield (NJ50) 141 75 230 636 1314 2156
Central Howell / Freehold (NJ10) 94 67 165 513 1135 1929
Northern High Point (NJ59) 50 21 56 268 721 1327
Forecast: NOAA NCEP Coupled Forecast System model version 2 (CFSv2) forecast system (3.5 months) (USPEST.ORG)

 

Pest Scouting – Growing Degree-day Ranges (150-250 GDD50)
CROP TYPE Common Name Scientific Name GDD Min (50F) GDD Max (95F) Reference Developmental / Target Stage
Malus, Prunus, many Eastern tent caterpillar Malacosoma americanum 90 190 2 Larvae treatment before tents apparent (near 150-GDD50)
Elm, Service berry Woolly elm aphid Eriosoma americana 121 246 2 (6) Control target
Conifer Hemlock woolly adelgid Adelges tsugae 150 150 RU Eggs and 10% hatch
Conifer Spruce spider mite Oligonychus ununguis 150 175 4 1st egg hatch
Conifer Spruce needleminer Endothenia albolineana 150 200 4 1st larvae active
Conifer Balsam gall midge Paradiplosis tumifex 150 300 4 Adults laying eggs
Witchhazel, River birch Spiny witchhazel gall aphid Hamamelistes spinosus 171 – 6 Control target
Birch Birch leafminer Fenusa pusilla  190 290 RU Larvae (1st generation)
Conifer Spruce spider mite Oligonychus ununguis 190 363 RU Immatures/Adults
Honeylocust Honeylocust pod gall midge Dasineura gleditchiae 192 229 RU Larvae
Holly Holly leafminer Phytomyza ilicis 192 290 RU Egg hatch
Holly *Native holly leafminer Phytomyza ilicicola 192 298 2 Egg hatch
Rhododendron Rhododendron borer Synanthedon rhododendri 192 298 2 Typical treatment window
Larch Larch sawfly Pristophora erichsonii 192 299 2 Typical treatment window
Andromeda Andromeda lacebug Stephanitis takeyai 192 303 RU Adults
Rhododendron Rhododendron gall midge Clinodiplosis rhododendri 192 363 RU Larvae
Willows, Cottonwood, Poplar Imported willow leaf beetle Plagiodera versicolora 192 448 RU Larvae/Adults
Privet Privet thrips Dendrothrips ornatus 192 618 2 Typical treatment window
Lilac, ash, privet, many Lilac / Ash Borer Podosesia syringae 200 299 RU Adults – 1st Treatment
Spruce Spruce budworm Choristoneura fumiferana 200 300 5 Larvae
Elm Elm leafminer Fenusa ulmi 215 240 5 Adult emergence
Wild and cultivated roses Roseslug sawfly Endelomyia aethiops 230 – 6 Egg hatch / early instars
Deciduous, many Hawthorn lacebug Corythucha cydoniae 239 363 RU Nymphs/Adults
Conifer Arborvitae leafminer Argyresthia thuiella 245 360 RU Larvae Treatments
Prunus American plum borer Euzophera semifuneralis 245 440 5 Adult flight, egg laying
Boxwood Boxwood mites Eurytetranychus buxi 245 600 RU All Stages
Lilac Lilac leafminer Caloptilia syringella 246 363 5 Larvae Treatments
Holly Holly leafminer Phytomyza ilicis 246 448 RU Larvae Treatment
Yew Taxus mealybug Dysmicoccus wistariae 246 618 RU Adults/Crawlers
Conifer Pine sawflies (Red-headed) Neodiprion lecontei 246 1388 RU Larvae (1st generation)
Boxwood Boxwood leafminer Monarthropalpusi flavus 249 – 6 Adult emergence
Conifer Eastern spruce gall adelgid Adelges abietis 250 310 5 egg hatch, galls begin forming (not a control target)
References RU Rutgers Cooperative Extension – IPM Notes
2 http://ccetompkins.org/resources/using-growing-degree-days-for-insect-management
3 https://extension.psu.edu/ipm-basics-for-christmas-trees#section-2
4 https://www.canr.msu.edu/ipm/agriculture/christmas_trees/gdd_of_conifer_insects
5 https://www.agriculture.nh.gov/publications-forms/documents/landscape-pests.pdf
6 https://extension.umd.edu/ipm/pest-predictive-calendar-landscapenursery
7 https://www.canr.msu.edu/ipm/agriculture/christmas_trees/gdd_of_landscape_insects

 

Boxwood Blight risk-model information, considerations, and links:

Boxwood Blight Risk Assessment as of 4/15/2021
Region Location CODE 15-April 16-April 17- April 18-April 19-April
Southern Upper Deerfield NJ50 Low  Very Low  Very Low  Very Low  Very Low 
Central Howell / Freehold NJ10 Low  Very Low  Very Low  Very Low  Very Low 
Northern High Point NJ59 Very Low  Very Low  Very Low  Very Low  Very Low 
Please check your local boxwood blight risk at (https://uspest.org/risk/boxwood_app)

 

Considerations:

Become a Boxwood Blight Advocate to receive quarterly updates (through the Horticultural Research Institution)

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August 19, 2020

CFAP Webinars for Additional Eligible Commodities

Join the USDA Farm Service Agency this afternoon, Wednesday August 19th at 3 pm, for the “Coronavirus Food Assistance Program Producer Webinar: Additional Eligible Commodities Added.” USDA Farm Service Agency will discuss additional commodities that are now eligible for the Coronavirus Food Assistance Program (CFAP), providing detailed examples on nursery crops, specialty crops, cut flowers, eligible aquaculture, and more. Registrations for this webinar are being accepted here.

The New Jersey Farm Service Agency (FSA) will be hosting an informational Nursery/Cut Flowers Stakeholders Webinar on Thursday, August 20th at 10 am regarding nursery and cut flowers eligibility for the Coronavirus Food Assistance Program (CFAP). This webinar will be held by a virtual Teams Meeting. Instructions on how to enter a Teams meeting using a computer or smartphone can be viewed here. If you are unable to attend virtually via Teams, you may dial in to hear the presentation. Slides to be presented are available here, although they are subject to modification prior to the event.

Please contact Lindsay Caragher at Lindsay.Caragher@usda.gov or 609-438-3133 with any questions about Teams Meeting or the webinar in general.

USDA’s Farm Service Agency is accepting applications through September 11, 2020 for the CFAP program which helps offset price declines and additional marketing costs because of the coronavirus pandemic.

Filed Under: Commercial Ag Updates, Fruit, Landscape, Nursery, & Turf, Tree Fruit, Vegetable Crops Tagged With: , , , , ,
July 20, 2020

Managing Heat Stress in Nursery and Landscape Plants

With temperatures approaching or exceeding 95oF for many areas of the state, there is potential for heat stress to negatively impact nursery and landscape plants both in the ground and in containers. Most trees and shrubs in our area can begin to experience some degree of heat stress when temperatures exceed 85oF. Several factors can influence the extent of heat stress injury, including the severity and duration of high temperatures, relative humidity, wind, soil moisture status, the age and condition of the plant, and how well the particular species of plant is adapted to dealing with these conditions.

Japanese Maple

Leaf Scorch on Japanese Maple caused by heat stress. Photo Credit.

Heat stress can cause damage to the leaves, resulting in dried or curled edges, as well as reddish or pale coloration as the green chlorophyll pigment begins to break down. This damage may only be superficial, but in some cases it could cause serious injury and death of the leaf tissue. One factor that greatly affects the severity of tissue damage caused by heat stress is the hydration status of the plant before the onset of extreme temperatures.

Plants will naturally dissipate heat through the process of transpiration, provided there is adequate moisture in the soil to support this function. During periods of extreme temperatures, the roots will struggle to draw enough water from the soil to keep up with the rate of water vapor that is exiting the leaves through transpiration. This leads to symptoms such as leaf scorch, curled leaves, discoloration, defoliation, die-back, and temporary wilting. Because the plant is experiencing stress and a disruption in its normal physiological functions, it becomes more susceptible to insect and disease problems.

There are several preventative measures that can be taken to reduce the impacts of heat stress in nursery and landscape plants.

  1. Thoroughly water plants either in the evening or in the early morning before extreme temperatures occur. Water the plants deeply and use irrigation methods that minimize leaf wetness to reduce the potential for foliar diseases.
  2. Properly mulch plants to conserve water in the soil and help lower soil temperatures. Bark mulch, leaf mulch, straw, and other organic mulches will help to lower the temperature in the root zone, while gravel mulches can actually increase root zone temperatures. Be sure to provide additional water to newly mulched plants to prevent dry mulch from taking moisture away from the roots.
  3. Avoid fertilization during periods of heat stress because this can absorb moisture in the root zone and further contribute to dehydration of the plant.
  4. Avoid applying herbicides that can volatilize in high temperatures and drift, causing damage to non-target species.
  5. Pay special attention to plantings that are located next to driveways, concrete patios, or other structures that can absorb and radiate additional heat to the plants. These areas will likely require additional irrigation.

 

Additional Resources:

How to Protect Trees and Other Landscape Plants from Heat Stress

Reducing Heat Stress to Container Grown Plants

Natter’s Notes: Heat Stress

Hot Weather Takes a Toll on Georgia Landscapes

Filed Under: Landscape, Nursery, & Turf, Nursery Tagged With: , , , ,
June 4, 2020

Immediate potential for Boxwood Blight activity: Plus a Nursery and Greenhouse growers’ update

 

There is a potential for new boxwood blight infections in the next few days according to 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. According to https://uspest.org/risk/boxwood_app, this is the first legitimate potential for boxwood blight spread and new infections in 2020 for southern NJ. Please continue preventative/protectant fungicide applications utilizing; chlorothalonil (FRAC Group M05), mancozeb (FRAC Group M03), and QoI-fungicides (FRAC Group 11) in a rotation. Please contact Tim Waller at twaller@njaes.rutgers.edu for more information or questions.

UPDATES: 

Growing Degree-days as of 6/4/20 using NEWA

GDD50 = Growing Degree-Day with min. temp. set to 50F

Upper Deerfield = 548.5 GDD50 ; Howell = 407.5 GDD50 ; Pequest = 335.0 GDD50

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/

Pests: The number of accumulated growing degree-days has been rapidly increasing with higher and higher temperatures (approaching normalcy). Throughout New Jersey various adult borers will be emerging, these include; Lilac, Emerald Ash, Banded Ash Clearwing, and Peach Tree borers. Additionally, Ambrosia beetles (multiple species) will be in-flight and actively seeking egg-laying locations. Pyrethroids should be used as preventative sprays but should be targeted to the bases of susceptible hosts such as Magnolias, Yellow bud, Red bud, Japanese maples, Styrax, and Hybrid chestnuts. These Targeted applications are geared towards protecting beneficial insect populations. The eggs of many scale insects are hatching now, leaving their ‘crawler’ stage vulnerable to pesticide applications. Scale insect species to be mindful of; Maskell, Oystershell, Taxus, Euonymus, Prunicola, Oak lecanium, Japanese maple, Cottony maple, Calico, Golden oak, and Juniper scale. Aphids, especially on roses, and mites will be increasing their populations with the warmer weather and should be minded when in high density. Management should utilize an appropriate pesticide rotation when necessary, as these pests are prone to developing pesticide resistance quickly. Four lined plant bugs, basswood lacebug, and multiple leaf and plant hoppers have been reported south of NJ and should be monitored and treated for as appropriate through the coming weeks as many of these insects are capable of vectoring plant viruses. Lilac leafminer, Juniper tip-midge, and Pin oak sawfly may also be an issue in some locations. Red-headed flea beetle will be hatching between 250-480 GDD50, with adults emerging between 500-1000 GDD50. A second generation of larva will then be active between 1,570 to 1860 GDD50, emerging later 1,878 to 2,318 GDD50. Reminder, keep an eye out for the Box tree moth that has been identified approaching the border of US and Canada. This pest has prompted APHIS importation amendments for Boxwood, Euonymus, and Illex. Gypsy moths, Bagworms, Mimosa webworm will be hatching or emerging in many parts of the state very soon, (in some locations they may already have).

Please visit https://njaes.rutgers.edu/pubs/publication.php?pid=E334 for more specific information.

Understanding and approaching plant diseases: The weather as of late has been conducive to plant disease for much of NJ. Higher humidity, increasing temperatures, and prolonged periods of leaf wetness (particularly at night) are considered the factors associated with the ‘sweet spot’ of disease development. Regularly scheduled protectant fungicide applications should be continued if a pathogen or history-thereof is suspected. Compounds should be rotated to guard against pesticide resistance to any one compound (rotating high/medium-risk with low-risk materials). Also, any steps geared towards increasing airflow, reducing wet-feet, limiting mechanical injury, and reducing leaf wetness duration or excessive overhead irrigation during this warm and humid period will benefit disease management efforts.

Please visit: https://njaes.rutgers.edu/pubs/publication.php?pid=E036 for more specific information on individual plant and pathogen species.

Other timely diseases to note: Many needle cast diseases of conifers should be well into a fungicide application schedule, utilizing chlorothalonil, azoxystrobin, basic sulfate coppers, mancozeb, and T-methyl in a rotation of materials. Many of these compounds will also control Pine needle rust that may become prevalent in some locations, especially those locations with high levels of goldenrod or aster weeds. Botrytis and powdery mildew are still a concern in many parts of the state, especially those that are experiencing cooler nighttime temperatures. What fungicide used is dependent on the specific host species in many cases. Please refer to the link above for specific information. Fungal and bacterial leaf spots are very common and often only intensively treated if those plants are to enter the market the next season. However, in areas prone to disease or severe cases (defoliation occurs), treatments should be preventative and conducted throughout the season. Sooty mold grows on the honeydew produced by large populations of sap-sucking insect pests (aphids, scales, leaf/plant hoppers). Controlling the insect pests is our best option to reduce this unsightly disease. In severe casts of sooty mold, plants can be washed free of this fungal growth using mild detergents. Phytophthora diseases are ever present at the nursery, however cultural practices such as sterilized potting media, cleaning tools and machinery regularly, efforts to reduce wet-feet or overwatering, and sterilization or treatment of recycled water can have profound impacts on the expression or spread of Phytophthora diseases. When fungicide applications are required, materials like phosphorus acids, fosetyl-Al (Aliette), mefenoxam (Ridomil), and etridiazole + T-methyl (Banrot) are commonly used. Rotation of these compounds and proper disease identification are incredibly important as many root-rotting pathogens have a strong propensity towards developing pesticide resistance.

Please consider the Rutgers Plant Diagnostics Laboratory for pest/pathogen identification concerns: https://njaes.rutgers.edu/plant-diagnostic-lab/

 

Online discussions and credit events

NJNLA pesticide credit webinar/course: Invasive Forest Pests: New Threats and Their Management (6/10/20): https://www.njnla.org/events/EventDetails.aspx?id=1383945

Webinar – June 10th, 2020 – 7:00pm to 8:30pm. Invasive Forest Pests: New Threats and Their Management. You must include your email address when registering. Information to join Webinar will be sent just prior to the start. Cost: $35/Member, $50/Non-Member. NJ Pest Credits: 3A (Ornamentals) – 3, PP2 (Private Applicator Category) – 3, 2 (Forest) – 3, 8C (Campgrounds) – 3, 9 (Regulatory) – 3,. CNLP: Environment – 1.5, LTE/LTCO: 1 CEU, NJUCF: 1 CEU and ISA is still pending. 

EPA information pertaining to online credits for licenses expiring in 2020: https://pestmanagement.rutgers.edu/increased-online-ceus-for-licenses-expiring-2020-act-now/

Ask the Agent (every Wednesday @ 7:00pm): https://go.rutgers.edu/t7wjkit1 . A new online forum has been created where anyone can log-on and speak with Rutgers Cooperative Extension agents (multiple agents from multiple counties)

NJNLA- Wine Down Wednesdays (every first and third Wednesday @ 7:00pm-8:00pm). Email: Lori Jenssen @ njnla.director@gmail.com. This is a great opportunity to speak with other green-industry businesses.

 

Rutgers nursery survey, advisory, and other resources:

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

The new nursery agents have prepared a preliminary survey aimed at understanding the needs of our growers and clientele, i.e. you. Please take a moment to complete the survey, as this type of information really helps the agents secure grant funding to deal with the problems you actually have. Thank you!

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

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