There is a potential for new boxwood blight infections today and tomorrow with the rain/humidity and higher temperatures
– Protective fungicide applications should remain in effect or be initiated immediately for Boxwood Blight (nursery and landscape settings) –
Boxwood Blight risk-model information, considerations, and links:
| Boxwood Blight Risk Assessment as of 5/4/2021 | ||||||||
| Region | Location | CODE | 3-May | 4-May | 5-May | 6-May | 7-May | 8-May |
| Southern | Upper Deerfield | NJ50 | Very Low | Infection Risk | Infection Risk | Very Low | Very Low | Very Low |
| Central | Howell / Freehold | NJ10 | Very Low | Low | Low | Very Low | Very Low | Very Low |
| Northern | High Point | NJ59 | Very Low | Very Low | Low | Very Low | Very Low | Very Low |
| Please check your local boxwood blight risk here (click here and type in your area code – select closest station) | ||||||||
- These advisories are general in nature and change rapidly so someone from your business should be using this risk model (CLICK HERE) daily if boxwood is important to your financial stability – In 30 seconds you can have a better idea of boxwood blight (and other pathogen) activity in your immediate area!
- (click on the link – input area code – select closest weather station – check 7-14 prediction – click on graph / table)
Fungicides;
- You very well may have these materials already applied as ‘cover-sprays’ – But – be mindful that protectant fungicides loose efficacy the more rain they are subjected to, and reapplication may be warranted.
- ROTATE between Fungicide Resistance Action Committee (FRAC codes) whenever possible
Format: [FRAC code]: Chemical name (Trade names)
- [M05]: Chlorothalonil (Daconil WS)
- [M05 + 1] Chlorothalonil + Thiophanate methyl (Spectro 90WDG)
- [11] Trifloxystrobin + [7] Fluopyram (Broadform)
- [11] Trifloxystrobin + [3] Triadimefon (Armada 50WDG)
- [M03] Mancozeb
- [12] Fludioxonil (Medallion WDG)
- [3] Tebuconazole (Torque)
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.
Resources
- Become a Boxwood Blight Advocate to receive quarterly updates (through the Horticultural Research Institution) – Email to join: bboxwood-advocate-g+subscribe@vt.edu
- Click here for additional BWB research updates
- CLICK HERE FOR A FREE DOWNLOAD – BOXWOOD HEALTH, Best Management Practices Production and Landscape Management (18 pages – Version 3.0)
- Click here for more BWB initiatives
