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ONLINE IPM WEATHER DATA and DEGREE-DAYS
CURRENT CONDITIONS
6/15/98
Previous updates available for June 9, June 1 and May 26 update
Continuing with "normal" temperatures
In W. Oregon, since about May 31, temperatures have been almost exactly normal, with little to no measured precipitation, ending the cool wet weather during the last 3 weeks of May. We should now be getting "back on track" with pest developments.
In the Willamette valley, so far, however, cabbage loopers are being trapped in moderately high numbers, but black cutworm numbers are low. Counts of bertha armyworm have been near zero and corn earworm has been zero so far. Send in any reports from other regions and crops of pest developments to me at coopl@bcc.orst.edu. Check the Oregon Climate Service or The Weather Channel for the latest forecasts.
A new feature of this web site is the "file-upload" version of the degree-day model - now you may use your OWN weather data files to run the crop and pest models.
The updated graph shows that in Corvallis, the degree-day accumulations have been normal for the past 15 days, but are still much lower than in 1997.
Individual Pest Model Predictions (selected)
note: forecasts are made using actual 5-day forecasts followed by historical normals
Western cherry fruit fly - BIOFIX March 1
**** revised 6-15-98 ****
Willamette Valley - First emergence was predicted May 31, first eggs on fruit was predicted June 7, first hatch was predicted June 12, and peak egglaying predicted June 20
The Dalles (warmest locations) - First emergence was predicted May 6, first eggs on fruit May 13, first hatch May 19, peak egglaying May 28, 100% emergence June 1, and first pupation predicted on June 5
Hood River (lower valley) - First emergence was predicted on May 28, first eggs June 4, and first hatch June 9, and peak egglaying predicted June 17
Codling moth
**** revised 6-15-98 ****
Medford - BIOFIX Apr 21; 3% egg hatch predicted June 1; 20% egg hatch predicted June 9; 50% egg hatch predicted June 18, and 75% egg hatch predicted June 26
Corvallis/Eugene - BIOFIX Apr 30; 3% egg hatch predicted June 9; 20% egg hatch predicted June 20, and 75% egg hatch predicted June 30
Hood River (lower valley) - BIOFIX Apr 24; 3% egg hatch predicted on May 31; 20% egg hatch predicted June 9, and 75% egg hatch predicted June 29
Obliquebanded leafroller
note: this is the Hazelnut version of the model -
has not tested in pears and does not require a BIOFIX (default of March 1 always used)
**** revised 6-15-98 ****
McMinnville - 5% moth catch in pheromone traps predicted June 7, and first egglaying predicted on June 14, and peak egg laying predicted July 1
Hood River - 5% moth catch in pheromone traps predicted June 7, first egglaying predicted on June 13, and 50% catch in pheromone traps predicted June 23
Corvallis - 5% moth catch in pheromone traps predicted June 12, first egglaying predicted on June 20, and peak egg laying predicted July 6
Orange tortrix
**** revised 6-15-98 ****
Forest Grove - Peak egglaying predicted May 8, peak egg hatch predicted May 30, peak density of large larvae predicted July 7
McMinnville - Peak egglaying predicted May 11, peak egg hatch predicted June 1, peak density of large larvae predicted July 9
Corvallis - Peak egglaying predicted May 17, peak egg hatch predicted June 6, peak density of large larvae predicted July 13
Strawberry root weevil
**** revised 6-15-98 ****
Corvallis - Currently adults emerging, peak adult emergence predicted June 18, peak egglaying predicted July 5
Madras - Currently teneral adults in soil, a few adults may have emerged by now, peak adult emergence predicted June 26, peak egglaying predicted July 11
European pine shoot moth
**** revised 6-15-98 ****
McMinnville - First moth catch in pheromone traps was predicted May 29, 50% catch predicted June 14, and 75% catch predicted June 23
Corvallis - First moth catch in pheromone traps was predicted May 30, 50% catch predicted June 16, and 75% catch predicted June 25
San Jose scale
**** revised 6-15-98 ****
**** subject to revision within a few days, awaiting more accurate BIOFIX dates - currently using a default of March 15 ****
Corvallis - While first crawlers are normally expected the first week in June, current predictions are June 15, and average time of crawler treatment predicted July 7
Disclaimer: No claims are made as to the correctness or appropriateness of this information for your particular needs. No specific pest control products are intended for
endorsement or use. This responsibility rests solely with the people who interpret and implement information from this and other sources. Use all predictive information
with caution - errors occur, and predictive models do not replace the need for proper monitoring in the field. If you observe conditions that differ substantially from
model predictions, please contact us to determine if the model inputs were incorrect, if the model functioning or weather data are in error, or if the model is inappropriate
for your conditions.
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This project funded in part by a grant from the USDA-Western Regional IPM program.
On-line since April 5, 1996
Last updated June 15, 1998
Contact Len Coop at coopl@bcc.orst.edu if you
have any questions about this information.
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