Pythium root rot — Plant & Pest Advisory

May 14, 2023 Tim Waller, William Errickson and Steven K. Rettke

Conifer Pest and Disease Update 5/15/2023

In this edition:

Insects – Pest Scouting with growing degree-days (250-600 GDD50)
- Scales
- Mites
Diseases
- Needle casts (Rhabdocline and Swiss needlecasts – Douglas fir, & Rhizosphaera – spruces)
- Phytophthora
Soil fertility – resources

Please click “read more” below to get updates on pests, diseases, and other important resources for the week of 5/15/2023.

[Read more…]

May 14, 2023 Tim Waller, William Errickson and Steven K. Rettke

Nursery Pest and Disease Update 5/15/2023

In this edition:

Insects:
- Scale crawler emergence
- Borer insects
- Upcoming problem pests / Redheaded flea beetle / SLF / Pest Scouting Guides
Diseases:
- Leaf spot / foliage disease management
- Fire blight on Rosaceous hosts
- Canker fungi
- Boxwood blight
- Oomycete root diseases (Phytophthora, Pythium, Phytopythium)
Plant Spotlight:
- NJ native azalea species

Please click “read more” below to get updates on pests, diseases, and other important resources for the week of 5/15/2023.

[Read more…]

Filed Under: Landscape, Nursery, & Turf, Nursery, Turf Tagged With: 2023 nursery IPM, anthracnose, bacteria, bacterial disease, bacterial leaf spot, boxwood blight, boxwood blight risk model, bronze birch borer, BWB, canker, clearwing borer, crawler activity, Early Season Pest Scouting, emerald ash borer, fire blight, fireblight, foliage, Fungicides, landscape IPM, leaf spot, Nursery, Nursery IPM, oomycetes, pest scouting guide, phytophthora, Phytopythium, protectant fungicides, Pythium, Pythium root rot, redheaded flea beetle, RHFB, scale insects, soft scales

April 27, 2023 Tim Waller

Nursery Pest Update 4/25 – 5/5/2023

Please note: The Rutgers Nursery and Green Industry Working Group is working to deliver regular pest and disease updates throughout the season. These will be in addition to important alerts, critical topics, and pesticide credit opportunities. This tool is made for you, the commercial agriculture business, so please let us know if there are particular topics you would like to see included in the regular update.

Email: twaller@njaes.rutgers.edu Phone: 856-451-2800 Ext. 1.

Insect Pests

Projected GDD50 accumulation as of 4/25/2023 (these change throughout the season!)
Region	Location	25-Apr	1-May	1-Jun	1-Jul	1-Aug
Southern	Upper Deerfield (NJ50)	251	281	682	1370	2218
Central	Howell / Freehold (NJ10)	188	207	537	1160	1957
Northern	High Point (NJ59)	142	143	371	864	1507
Forecast: 7-month NMME based seasonal climate forecast (USPEST.ORG)

Please download and print the Rutgers Nursery and Landscape Pest Scouting Guide or Conifer and Christmas Tree Pest Scouting Guide and refer to this post “Obtaining your local growing degree-days (GDD)” for additional information. (See pest scouting guides for complete list of references)

Please SHARE what you SEE!! If you see a pest, disease, otherwise interesting or troublesome issue please report it to the Working Group by following the QR Code on the front of the Pest Scouting Guides or by filling out this reporting form.

Please continue reading for much more detailed and important information!

[Read more…]

Filed Under: Landscape, Nursery, & Turf, Nursery, Turf Tagged With: 2023 nursery IPM, boxwood blight, boxwood blight risk model, bronze birch borer, BWB, clearwing borer, Early Season Pest Scouting, emerald ash borer, Fungicides, landscape IPM, Nursery, Nursery IPM, oomycetes, pest scouting guide, phytophthora, protectant fungicides, Pythium, Pythium root rot, redheaded flea beetle, RHFB, scale insects, soft scales

July 1, 2015 Richard Buckley

Too Much of Everything is Just Enough

Right along with stormy skies, the Plant Diagnostic Laboratory is firing up with golf turf samples. We’ve seen it all lately: anthracnose, summer patch, slime molds, take-all, Pythium root diseases, annual bluegrass weevils, black turfgrass ataenius, and lots of wear and tear. Here are a couple of random notes from the last week or two: