protectant fungicides — Plant & Pest Advisory

May 12, 2024 Andy Wyenandt

Understanding Protectant Fungicides (FRAC groups M01 – M12) in 2024

Protectant (contact) fungicides, such as the inorganics (copper, FRAC group M01) and sulfur (FRAC code M02); the dithiocarbamates (mancozeb, M03), phthalimides (Captan, M04), and chloronitriles (chlorothalonil, M05) are fungicides which have a low chance for fungicide resistance to develop. Protectant fungicides typically offer broad spectrum control for many different pathogens.

Why wouldn’t fungi develop resistance to protectant fungicides? Protectant fungicides are used all the time, often in a weekly manner throughout much of the growing season.

[Read more…]

Filed Under: Vegetable Crops Tagged With: protectant fungicides

April 10, 2024 Tim Waller

Immediate Potential for Boxwood Blight Throughout NJ THIS WEEK

Boxwood Blight Risk Assessment as of 4/10/2024
Region	Location	CODE	10-Apr	11-Apr	12-Apr	13-Apr	14-Apr	15-Apr
Southern	Upper Deerfield	NJ50	Very Low	Minor Risk	High Risk	Very Low	Very Low	Very Low
Central	Howell / Freehold	NJ10	Low	Low	High Risk	Very Low	Very Low	Very Low
Northern	High Point	NJ59	Very Low	High Risk	VERY High Risk	Very Low	Very Low	Very Low
			W	TH	F	S	Sun	M
Please check YOUR LOCAL risk (click here)

There is a potential for boxwood blight infections this Thursday and Friday throughout ALL of NJ. Incoming rains, coupled with consistent temperatures may initiate boxwood blight infections this week.

It is time to begin protective fungicide applications in boxwoods throughout the state if you have not already done so.
If BWB is important to your business – Use the USPEST – PUSH Alerts – (click here) – to setup weekly email alerts. Create an account, watch the tutorial, and then set up your subscriptions. You select which locations (as many as you like), days you want to receive emails (pick Sunday/Monday), and what you would like to receive alerts about (BWB and a variety of other pests and diseases). Rutgers is not directly affiliated, however this is an incredible tool.

March 31, 2024 Tim Waller

High Potential for Boxwood Blight in Southern NJ – beginning Tuesday (4/2)

Boxwood Blight Risk Assessment as of 3/31/2024
Region	Location	CODE	31-Mar	1-Apr	2-Apr	3-Apr	4-Apr	5-Apr
Southern	Upper Deerfield	NJ50	Low	Low	Minor Risk	Minor Risk	Very Low	Very Low
Southern	Bridgeton	D4116	Low	Low	Minor Risk	High Risk	Very Low	Very Low
Southern	Millville Airport	KMIV	Low	Low	Minor Risk	High Risk	Very Low	Very Low
Southern	Greenwich	NJ05	Low	Low	Minor Risk	High Risk	Very Low	Very Low
Central	Howell / Freehold	NJ10	Very Low	Very Low	Low	Low	Low	Low
Northern	High Point	NJ59	Very Low	Very Low	Very Low	Very Low	Very Low	Very Low
			Su	M	Tu	W	Th	F
Please check YOUR LOCAL risk (click here)

There is a potential for boxwood blight infections this TUESDAY and WEDNESDAY throughout much of SOUTHERN NJ – especially Bridgeton/Upper Deerfield areas. Incoming rains, coupled with consistent temperatures may initiate boxwood blight infections this week.

The rain SHOULD temporarily subside Monday EVENING – with enough time to get a spray on commercial nursery crops.

It is time to begin protective fungicide applications in high value areas if you have not already done so.
If BWB is important to your business – Use the USPEST – PUSH Alerts – (click here) – to setup weekly email alerts. Create an account, watch the tutorial, and then set up your subscriptions. You select which locations (as many as you like), days you want to receive emails (pick Sunday/Monday), and what you would like to receive alerts about (BWB and a variety of other pests and diseases). Rutgers is not directly affiliated, however this is an incredible tool.

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

Nursery Pest and Disease Update 6/15/2023

In this edition:

Insects:
- MORE Scale crawlers emerging
- Borers
- Beetles
Diseases:
- Oomycete root diseases (Phytophthora, Pythium, Phytopythium)
- Leaf spots / foliage diseases
- Boxwood Blight – reminder
- Virus observations
Nutrient Management
- Managing Soluble Salts by monitoring EC
- Plant Tissue analysis
Plant Spotlight:
- American Holly (Ilex opaca)
Cumberland Nursery / NJNLA – Twilight: tonight (6/15) for NURSERYMEN ONLY (contact twaller@njaes.rutgers.edu or 856-451-2800 Ext. 1. for details)

Please click “read more” below to get updates on pests, diseases, and other important resources for the week of 6/15/2023.

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.

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.

Understanding Protectant Fungicides (FRAC groups M01 – M12) in 2024

Immediate Potential for Boxwood Blight Throughout NJ THIS WEEK

It is time to begin protective fungicide applications in boxwoods throughout the state if you have not already done so.

High Potential for Boxwood Blight in Southern NJ – beginning Tuesday (4/2)

The rain SHOULD temporarily subside Monday EVENING – with enough time to get a spray on commercial nursery crops.

It is time to begin protective fungicide applications in high value areas if you have not already done so.

Nursery Pest and Disease Update 6/15/2023

Conifer Pest and Disease Update 5/15/2023

Nursery Pest and Disease Update 5/15/2023

NJAES Event Calendar

Commercial Recommendations

Related Links

Funding in part from: