Inspectors at the New Jersey Department of Agriculture recently flagged an unusually high number of tea roses expressing rose mosaic disease. These roses were shipped in from out of state. If you plan to inventory this type of rose for the upcoming season, it is highly advised that you have conversations about this with your distributer and more importantly, obtain the required virus-free certifications. Rose mosaic disease is a complex of viruses that most commonly includes Apple mosaic virus (ApMV) and Prunus necrotic ringspot virus (PNRSV), and to a lesser extent Arabis mosaic virus (ArMV) and Strawberry latent ringspot virus (SLRSV). Singularly or in combination, these viruses can all trigger mosaic symptoms.

Excerpts from NJ Department of Agriculture on the rose quarantine:

• Rose plants may be shipped onto the State of New Jersey only after they have been inspected during the growing season by a state inspector in the state in which they were grown at the time appropriate for symptom expression and found to be visibly free from virus diseases, especially viruses associated with rose mosaic disease.
• All shipments of rose plants entering the State of New Jersey must be accompanied by an official certificate or statement issued by the proper state official in the state of origin, certifying that the plants were inspected during the growing season at a time when symptoms would be apparent and found visibly free of plant viruses.

There is still time to register for the August 2020 Nursery Twilight Meeting (Virtual)

Registrations will be accepted until noon Thursday. Registration is required (Free event).

Click here to register for the twilight meeting

NJ Pesticide License Recertification credits obtained: PP2 (1); 3A (1); 3B (1); 10 (1)

Instructions:

• Register for event at the above link
• Include your pesticide license number and date of birth if you would like recertification credits
• After registration you will receive a confirmation email with a link to the actual twilight meeting.
• Day-of: Please use the “join by browser-New” feature (not the “Join Now” feature)
• Day-of: Have your photo ID ready if you wish to obtain credits
• Day-of: You must have a video enabled device if you plan to acquire recertification credits. We must be able to see you. 

Thank you for your participation on this virtual front. 

Contact Tim Waller with any questions; twaller@njaes.rutgers.edu

 Thursday, August 27, 2020

6:00-7:00 pm

Click here to register for the twilight meeting

Registration password: nursery20

Please join us for presentations on pest management topics from our two nursery agents Tim Waller and Bill Errickson, Spotted Lanternfly updates from Steve Rettke, and water related updates from Sal Mangiafico. Given the current state of in-person meetings we are aiming to make this as educational and painless as possible. We would like everyone to feel comfortable with this online format for future meetings. We plan to have a longer meeting in late September (+2hr) to hear from more nursery specialists and provide another opportunity to obtain pesticide credits.

August 27th Agenda

(5:30pm)   Webinar platform opens to registrants; Photo ID Check, Welcome Remarks

__(recording begins)__

(6:00pm)  Effective IPM approaches Using Degree-days and Other Predictive Models– Timothy Waller, RCE (Cumberland)

(6:15pm)  Reduction of Pesticide Usage Through Cultural Practices- Bill Errickson, RCE (Monmouth)

(6:30pm)  Spotted Lanternfly Update & Review of Current Information Concerning This Invasive Insect- Steve Rettke, Ornamental IPM Program

(6:45pm)  Harmful Algae Blooms in NJ Lakes and Ponds and Their Effects on Agriculture- Sal Mangiafico, RCE (Cumberland & Salem)

__(recording ends)__

(7:00pm)  Additional questions; Photo ID Check, Adjourn

NJ Pesticide License Recertification credits obtained: PP2 (1); 3A (1); 3B (1); 10 (1)

In cooperation with the NJNLA, NJLCA, and NJCTGA

Instructions:

• Register for event at the above link
• Include your pesticide license number if you would like recertification credits
• After registration you will receive a confirmation email with a link to the actual twilight meeting.
• Registered guests will receive a reminder 1 week prior to the event with more specific instructions.
• Day-of: click the link in the registration confirmation email and select “join by browser-New” (if you do not currently have a WebEx app on your computer or video-enabled smartphone.
• Day-of: Have your photo ID ready if you wish to obtain credits

Additional requirements for those seeking credits:

• Licensed applicators with a recertification period expiring October 31, 2020 will be given an exemption from the NJDEP online credit cap of 25% and are eligible for all credits, otherwise this exemption does not apply.
• Government issued photo ID is required and will be verified prior or immediately after the  meeting (i.e. will not be video recorded)
• Attendees must be visible throughout the entire session (with live video on) and must stay to the end.
• Polls will be randomly scheduled, & attendance will be visually monitored by a moderator.
• Call-ins (audio only) are not eligible for pesticide recertification credits as of now; you need a computer/phone/tablet with *live* video capability.

We are here to help you connect, please contact Tim Waller (twaller@njaes.rutgers.edu) with any questions or concerns. Thank you very much for your willingness to cooperate within our online space!

Rutgers is dedicated to protecting your privacy and keeping your personal information safe. Your information will be kept strictly confidential; used solely to meet NJDEP ID verification protocol for recertification credit. Any information will be deleted after 60 days.

This PPA has four updates:

1. Growing Degree-day Update GDD₅₀
2. 2^nd generation scale insect hatch / crawler growing degree-day targets
3. Tuliptree and Magnolia scale insect activity and notes on treatment
4. Late summer boxwood blight considerations

(1) Growing Degree-days as of 8/5/2020

(Weather station selected for each location. Ex: NJ50 = Upper Deerfield)

Upper Deerfield (NJ50)= 2242 GDD₅₀ Howell/Freehold (NJ10) = 1946 GDD₅₀ Pequest (NJ58) = 1901 GDD₅₀

Cornell ForeCast Map

If you need help getting your Growing Degree-day models set up, please contact (twaller@njaes.rutgers.edu) 

(2) 2nd generation scale insect hatch / crawler GDD₅₀ targets

A second generation of scale insects will be hatching soon. Scout for crawlers and treat as needed.

format: scale insect species – (growing degree day GDD₅₀ targets)

• Maskell scale – (2035)
• Euonymus scale – (2235)
• Japanese maple scale – (2508)

Please refer to Tim Waller’s summer scale insect treatments PPA for additional information.

(3) Tuliptree and Magnolia scale egg hatch and crawler activity

Magnolia Scale & Maturing Females Photo- Steven Rettke of RCE

Tuliptree Scale With Honeydew & Sooty Mold Photo- Steven Rettke of RCE

Tuliptree scale and Magnolia scale insects begin hatching around ~2000 GDD₅₀ but continue to emerge through the month of September (+6 week period). Therefor scouting for 1^st and 2^nd instar nymphs (crawlers) is critical to controlling these pests. Treatments will be ineffective if made too early in the season, as many of the un-hatched eggs will still be viable and lead to infestation and damages later.

Given this wide window of emergence, three treatment strategies can be deployed

1. Delay pesticide applications for these pests until mid-October as the females will be dead and not harming the trees, all of the eggs will have hatched, and all of the crawlers will be vulnerable to appropriate materials (best approach)
2. Apply multiple suppressive sprays at the first sign of emergence (time consuming, labor intensive, costly)
3. Root or trunk applied systemic insecticides (often for very large trees)

Please refer to Steve Rettke’s Magnolia and Tuliptree scale insect PPA for additional information.

(4) Late summer boxwood blight considerations

As we enter into a period of cooler nighttime temperatures (< 77F) and frequent rain events, boxwood blight preventative sprays should be considered if you have not been making regularly scheduled applications. Boxwood blight is typically not as active during the heat of the summer, however, when cooler temperatures are coupled with prolonged periods of leaf-wetness the pathogen can infect.

Please refer to Tim Waller’s boxwood blight post for additional information and links to many other resources including numerous post from Rich Buckley of the Plant Diagnostic Lab.

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