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ONLINE IPM WEATHER DATA and DEGREE-DAYS
CURRENT CONDITIONS
6/9/98
Completely revised from June 1 and May 26 update
Getting back to "normal"
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, we have not seen a real upswing in pheromone trap catches, with cabbage loopers and black cutworm numbers on the decline rather than increase. 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 are the close-up maps of cumulative degree-days for the North and Central part of Oregon, including the Willamette Valley to the West over to Central Oregon as far as Sherman County and Bend/Redmond. Labels were added to most all weather stations now reported at this website.
The updated graph shows that in Corvallis, the degree-day accumulations have been normal for the past 8 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 6-9-98 ****
Willamette Valley - First emergence was predicted May 31, first eggs on fruit was predicted June 7, and first hatch predicted on June 12
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 predicted on May 28, first eggs June 4, and first hatch June 9
Codling moth
**** revised 6-9-98 ****
Medford - BIOFIX Apr 21; 3% egg hatch predicted June 1; 20% egg hatch predicted June 9; 50% egg hatch predicted June 17
Corvallis/Eugene - BIOFIX Apr 30; 3% egg hatch predicted June 9; 20% egg hatch predicted June 20
Hood River (lower valley) - BIOFIX Apr 24; 3% egg hatch predicted on May 31; 20% egg hatch predicted June 9
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 6-9-98 ****
McMinnville - 5% moth catch in pheromone traps predicted June 7, and first egglaying predicted on June 15
Hood River - 5% moth catch in pheromone traps predicted June 7, and first egglaying predicted on June 14
Corvallis - 5% moth catch in pheromone traps predicted June 12, and first egglaying predicted on June 20
Orange tortrix
**** revised 6-9-98 ****
Forest Grove - Peak egglaying predicted May 8; peak egg hatch predicted May 30
McMinnville - Peak egglaying predicted May 11; peak egg hatch predicted June 1
Corvallis - Peak egglaying predicted May 17; peak egg hatch predicted June 6
Strawberry root weevil
**** revised 6-9-98 ****
Corvallis - Currently adults beginning to emerge; Peak adult emergence predicted June 18
Madras - Currently pupae and teneral adults in soil; Peak adult emergence predicted June 25
European pine shoot moth
**** revised 6-9-98 ****
McMinnville - First moth catch in pheromone traps predicted May 29; 50% catch predicted June 15
Corvallis - First moth catch in pheromone traps predicted May 30; 50% catch predicted June 16
San Jose scale
**** 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 set June 15 as the date for first crawler emergence
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 9, 1998
Contact Len Coop at coopl@bcc.orst.edu if you
have any questions about this information.
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