Cougarblight Fire Blight Risk Model

edge graphic Cougarblight Fire Blight
Risk Model (Version 2009F) Tim Smith, WSU Extension

Four Day Degree Hour Total Thresholds

Potential Pathogen Presence Estimated by Fire Blight History(Below)
LOW RISK
CAUTION
HIGH RISK IF FLOWERS PRESENT
EXTREME RISK IF FLOWERS PRESENT

No fire blight in the area during the past season.
0 - 299
300 - 499
500 - 799
800+

Blight in your or neighboring orchard last year.
0 - 150
150 - 299
300 - 499
500+

Active Blight strikes or cankers are presently in your or neighboring orchard.
0 - 99
100 - 199
200 - 299
300+

Potential Pathogen Presence Estimated by Fire Blight History(Below)	LOW RISK	CAUTION	HIGH RISK IF FLOWERS PRESENT	EXTREME RISK IF FLOWERS PRESENT
No fire blight in the area during the past season.	0 - 299	300 - 499	500 - 799	800+
Blight in your or neighboring orchard last year.	0 - 150	150 - 299	300 - 499	500+
Active Blight strikes or cankers are presently in your or neighboring orchard.	0 - 99	100 - 199	200 - 299	300+