Daily LATE BLIGHT Forecast Information From BLITECAST: Southeastern PA, 2007
=======================================================================
For Tomatoes and Potatoes ##############################################
========================= # * = Standard sites through Sep 23 #
# ** = EXPERIMENTAL SITES through Sep 23 #
##############################################
How favorable is daily weather for LATE BLIGHT development? Values presented
in calendar format indicate favorability of weather for LATE BLIGHT development.
Key: 0-4 = Conditions not very favorable for LATE BLIGHT (0 = least favorable).
5-28 = Conditions favorable enough to warrant fungicide (28 = most favorable).
==================== ==================== ====================
LATE EXPERIMENTAL SITE ** EXPERIMENTAL SITE ** Standard Site *
BLIGHT Franklin: Waynesboro Lancaster: Mount Joy Lancaster: Leola
==================== ==================== ====================
Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
== == == == == == == == == == == == == == == == == == == == ==
June ==================== ==================== ====================
01-02: 0 0 1 1 4 6e
03-09: 0 3 3 3 3 4 4 1 3 3 4 4 4 4 5e 6e 6e 6e 6e 6e 4
10-16: 4 1 1 3 4 4 4 4 1R 1 2 2 2 2 4 0 0 1 1 1 1
17-23: 4 4 4 2 1 1R 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2
24-30: 1 1 0 0 0 2 2 2 2 3 2 2 3R 3 2 2 3 2 3 4H 4
==================== ==================== ====================
July ==================== ==================== ====================
01-07: 2 2 2 2 2 0 1 3 3 2 2 3 4 4 4 4 3 3 3 2 4
08-14: 1 1 2 2 2 1 1 4 4 4 4 3 1 1 4 4 4 4 3 1 1
15-21: 1 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 0
22-28: 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1
29-31: 1 3 4 1 2 2 1 2 2
==================== ==================== ====================
August ==================== ==================== ====================
01-04: 4 4 5# 4 2 2 3 2 2 2 3 2
05-11: 4 3 2 2 2 4 4 2 1 1 1 1 3 3 2 1 1 1 1 3 3
12-18: 4 2 2 2 2 1 1 3 2 2 2 2 1 1 3 2 2 2 2 1 1
19-25: 1 4 8#12#14#16#17# 1 4 8#12#14#16#18# 1 4 8#12#14#16#18#
26-31: 17#14#10# 6# 4 2 18#15#11# 7# 5# 3 18#15#11# 7# 5# 3
==================== ==================== ====================
Sept. ==================== ==================== ====================
01: 1 1 1
02-08: 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0
09-15: 0 0 2 4 4 4 5# 0 1 2 3 3 3 4 0 1 2 4 4 4 5#
16-22: 5# - - - - - - 5# 4 3 2 2 2 1 6# 5# 4 2 2 2 1
23-29: - - - - - - - 0 - - - - - - 0 - - - - - -
==================== ==================== ====================
--------------------------------------------------------------------------
Key: # = BLITECAST indicates late blight protection most important these days.
Values based on measured Temperature, Relative Humidity, Wetness, & Rain.
E = Early = BLITECAST indicates that recent weather was favorable for late
blight development but the initial thresholds (CS18; 10BFD) were not
reached yet.
R = Rain+Temperature based threshold (10BFD) = 10 Consecutive Blight
Favorable Days. If inoculum is present, symptoms are expected in
about 7-14 days.
H = Humidity+Temperature based threshold (CS18) = 18 Cumulative Severity
Values for the season. If inoculum is present, symptoms are expected
in about 7-14 days.
* STANDARD SITE: Disease forecast developed from quality on-site
calibrated environmental measurements.
** EXPERIMENTAL SITE: Disease forecast developed from experimental data;
calibration is in progress. Forecast is for experimental use only.
Compare results for Experimental sites with results from nearby
Standard sites before considering information from an Experimental site.
--------------------------------------------------------------------------
developed by Dr. Alan A. MacNab, Professor, Plant Pathology
Penn State College of Agricultural Sciences
211 Buckhout Lab, University Park, PA 16802
Updated: Sep 24, 2007; EMH
--------------------------------------------------------------------------
Where trade names are used, no discrimination is intended
and no endorsement by the Cooperative Extension Service is implied.
Return To Calendar Index