Plant Protection Center at Oregon State

WHAT'S NEW: MyPest Page - IPM Pest and Plant Disease Models and Forecasting - for Agricultural, Pest Management, and Plant Biosecurity Decision Support in the US


Log of What's New 2004-2009,   Latest What's New   What's New 2000-2003   What's New 1996-1999

The Oregon State University Integrated Plant Protection Center, in cooperation with The National Plant Diagnostic Network (NPDN), USDA NIFA (IPM Centers, NRI/AFRI Plant Biosecurity, E-IPM, W-RIPM, Cooperative Extension Service, others), USDA RMA, APHIS PPQ, numerous grower-supported weather networks, Oregon Climate Service, the OSU PRISM Group, the Western Weather Systems Workgroup, other Universities, NOAA, NWS, NRCS, the US Bureau of Reclamation, and others, has been working to make real-time daily weather data, degree-days, forecasts, pest and plant disease risk models and maps available to serve plant biosecurity, agricultural and pest management needs for the US and SW Canada. These formatted weather data, degree-days, and pest model products are kept current and relevant for decision support for Extension personnel, growers and farm managers, consultants, invasive species surveys, regulatory needs, researchers, and students. Please take 2-5 minutes and fill out our User Survey and give us feedback so we may better meet your particular needs.

LOG OF WHATS NEW 2004-2009
Added western bean cutworm model to degree-day model program to serve the midwest [corn and dry beans], in support of a project w/Iowa State Univ. Use with caution.

Added pecan nut casebearer model to degree-day model program to serve NM and TX, as requested by NM state climatologist Ted Sammis. Use with caution.

Revised degree-day model program to NOT include tabled output for days prior to any BIOFIX/starting date used, to "clean up" model output. If you wish to see these data, rerun the program with an earlier BIOFIX/starting date. The program was also revised so a flag "&uco=1" "use calc only" will skip the main interface and go directly to a calculation. The default (no flag provided) is to display the interface, which allows changing various parameters before running the calculations.

Added new degree-day model for cereal leaf beetle, Oulema melanopus.

Added new multi-region models for Tomato-potato late blight - NE US, Tomcast DSV (Tomato Black Mold) - NE US, and Soybean rust (experimental) - SE US, which can be useful for quickly surveying regions where high infection risk exists for a given time period. These are the same models that you normally must run for individual locations. To verify the model for a given point on the map, click on the location pin and you will be shown the model results for the past several days at that place.

Also, a new server is linked to the custom DD mapmaker program, which should provide better performance. Benchmarks show maps can often be obtained in 1/2 the time vs. our traditional server, which servers as a backup system.

Added new degree-day models for fruittree leafroller, Archips argyrospilus and emerald ash borer.

A new connection to the National Weather Service Digital forecast has been added to plant disease models - now you should see a new 7-day hourly forecast appended to weather data and plant disease models for all US locations accessed in our system. The new feature does slow down display of results due to the time required to gather and convert the data. Also, the methods used to estimate quantitative precipitation and leaf wetness are preliminary and subject to change. Currently, the Fox Weather LLC forecast is used for OR, ID, WA, and CA. As the new system gets further testing, we may add an option to switch to either forecast for the states where they are available. Currently, no forecast is available for Canadian locations.

The Google Maps interface to plant disease models has been enhanced and should now be more useful for navigation - if you zoom out or pan the map around, then more stations are shown on the map, up to a point (first 100 stations starting with the METAR and AGRIMET networks are displayed). Then, as before, place the mouse cursor over a blue pin to show the station code and network. Then to switch to this station code by clicking on it. Or display the entire network table by clicking on the network link. Also zoom into new areas, and more pins will appear. In this way the Google Maps interface can be used as ap primary means of selecting weather stations anywhere in the US, Canada, and parts of the Carribean and Mexico.

Also, note that we are upgrading the hourly data weather forecast to a new system (OR, WA, ID, CA states only). We should be posting forecast performance results in the near future.

A new WSU cherry powdery mildew model was added to the disease_risk program. It is now being tested - please use with caution.

Numerous updates to the website, including revised home page, beginning use of "" as a synonym of "" to highlight the increasing national focus of this website. New features and statistical analyses were added to the virtual data analysis tool.

A new codling moth model from WSU was added that predicts first flight (biofix), at least for Washington State and perhaps nearby regions. This model was developed in part to lessen growers' need to rely on pheromone trap counts for biofix, since they can be unreliable when infestations are low. Thanks to Rich in Idaho for the request. We recommend that you use this model to help check and confirm what pheromone traps reveal about first flight and biofix, and then use one of the other two models for subsequent events.

A new survey system was added, with a few changes and additional questions from the older survey. The change was prompted as a solution to spam being entered into the older survey form fields. Please take just 5 minutes or less to take the survey, so we can better meet your pest management modeling needs.

A new experimental gypsy moth model was developed to allow a simplified single-threshold degree day model for gypsy moth, based in part on the K. Sheehan model. Please use with caution, it has not been validated and is subject to change. It was calibrated to closely match the output of the WI-MN gypsy moth model implementation. Therefore, it is likely that this new model should work adequately in the great lakes region but should be used with more caution in other regions.

Updating tooltip (help balloon) help to more applications at the website. Adding tutorials currently linked from indextable.html, subject to testing, updates, and further additions.

Added tooltip help to risk_models page including a link to updated model documentation. Updated with tooltip help and other minor improvements. This tool is now linked to 56 models plus a generic degree-day calculator.

Updated user interface to several pages; new Map index page to state and network tables. New design for state and network tables with tooltip help. Expect several more changes in the coming days/weeks. Let us know what you think about the improvements, hopefully they address some of the "ease of use" and "learning curve" issues mentioned by helpful users of this system.

Most services have been restored, except for zone file forecasts of max/min data. That should return shortly.

A server outage has occurred several times during the past week - our apologies for any inconvenience. We are restoring functionality as fast as we can.

Documentation of Leaf Wetness Calculations:
Many of the plant disease models in this system use leaf wetness (LW) estimates. The following networks generally have leaf wetness sensors (and so are not estimated, but are measured directly):

Oregon Hood River (Adcon and IFPNET)
Oregon Milton Freewater (Adcon)
Oregon Medford (Adcon)
Oregon Willamette Valley (Adcon and Campbell)
Oregon The Dalles (IFPNET)

For weather networks not having their own LW sensors, we estimate it using a Fox Weather modified version of the Kim et al. (2004) Fuzzy Logic Leaf Wetness (FLLW) Algorithm. The FLLW model uses energy balance principles to assign probabilities to various combinations of temperature, dewpoint, and wind speed that are likely to produce condensation or dew on leaf surfaces. It is relatively robust, can be used in real time, and has worked well thus far in this system.

In addition, because the FLLW algorithm does not account for rainfall-induced leaf wetness, the Fox Weather LLC/IPPC weather/plant disease modeling system includes a precip-drying algorithm (FoxLW). This presumes an exponential-based drying curve and takes into account windspeed, seasonal adjustment, and day/night time.

Details of the FoxLW addition are:

               - For rainfall at 0.05 in/hr, LW = 10 for that hour
               - at 0.02 in/hr: in summer LW = 5, in winter or at night LW = 10.
               - LW should end < 0.5 hour after rain ends during day,
                        and about 1 hour after rain ends at night, for WS = 5mph.

               - if WS=10mph, then LW ends when rain ends.

               - NO LW for rain < 0.02 inch with WS >= 10mph.

               - LW = 3 if rain > 0.01 or < 0.02 with WS <=5mph
               - WS ranges from 5 to 10mph, LW 3 to 0.

The Kim et al. FLLW and FoxLW models are independent and parallel computations for a Leaf Wetness value: We output the HIGHEST LW of the two (they are NOT ADDED together, we just take the MAXIMUM value).

Changes and updates to this system are in development and expected in forthcoming releases.

Added two new models to the DD calculator/models program, gypsy moth egg hatch and gypsy moth larval development.

Added two new models to the DD calculator/models program, peach twig borer and walnut husk fly.

Revised state-level tables of weather data. New features include:

  1. More stations and networks, over 12,000 stations total
  2. More Degree-Day calculation features built in; current year (2008) linked to nearest forecast (NWS Zone) data & historical average (30-year) normal data; specify calculation end-date, degree-day graph displayed, auto calculate when you click the radio button, pest, crop and disease models database linked in for NW states (OR, WA, ID, MT, WY, AK, BC, UT, CA).
  3. Links for most stations to hourly weather data and graphs and selected PLANT DISEASE RISK models, including a generic degree-hour type model
  4. Oregon, S. Washington, W. Idaho forecasted weather data for Plant Disease risk models generated by FOX Weather/OSU IPPC.
  5. Report on recent hourly data quality
  6. Ability to sort the tables by clicking in the column headers, sort by Network or Latitude for example
  7. Smaller tables for major selected Networks available (saves time from loading 600+ station tables)
  8. New 30 yr average data for W. US, linked to calculator

Updating of Grasslinks map interaction interface from version 3.4 to 3.5. Here is an example of the changes.

Grasslinks 3.5 interface zoomed to Kansas City:

Grasslinks 3.4 interface zoomed to Kansas City:

These new features include multiple hierarchical layers, so that only layers appropriate to the zoom level are displayed, use of a rubber-band style zoom box to allow precise zooming, ability to show site labels, etc. This gives Grasslinks the essential functionality that more complex programs like Mapserver and Mapbender offer. All US and regional map pages and the US DD mapping calculator now use the updated interface. Also, the homepage was slightly redesigned, with a few changes in links here and there.

A recent slide show talk was linked which may provide some instructional value to using this site.

Now over 10,400 stations total in the system thanks to NPDN funding. Some recently added pest models such as cabbage maggot, a new codling moth model by Alan Knight (USDA-ARS), and apple maggot. New pages for the new Milton-Freewater network, a page with daily DD totals automatically updated for NW Rubus (caneberries), new tables to stations and data for each state, e. g. S. Dakota.

Historical station data extended to entire US and territories, 3,838 new records making a station total of 5,876. These are from the NCDC Clim84 free online data. Custom and daily DD maps are now using these data, and now you may calculate DDs for any of these 30-year "normals" stations.

Weather networks now include 2,400+ APRSWXNET stations, plus SNOTEL expanded from 334 to 672 stations, and with other adjustments, total stations have expanded from 3,500+ to 6,300+. Improved GRASSLinks map interface so that map queries are much faster when national highway data are used (this layer has no query data so was stalling the system by about 20 seconds). Now these queries to bring up degree-days and calculators from a GRASSLinks map should take around 1 second. For example see the NW USA daily DD maps. An expanded "50-state USA" region choice is now available from the home page map calculator and models shortcut links (1st item in region drop down menus). Although DD maps are not yet available for Alaska or Hawaii, the online weather data and site DDs can now be accessed for these states using this method, plus there is an Alaska stations table, as before.

Rebuilt Gubler-Thomas powdery moldew model for the Medford/Bear Creek weather network, as per request by wine grape growers.

Repaired Oregon only degree-day maps. An error had crept in about the time when legends were improved (1 month ago). These are at: ddmaps.html and ddmaps_n.html. These maps still have some problems - the Oregon base 32 map has a legend that makes the map harder to read. But others such as Medford, Hermiston and Ontario are now of the same accuracy but with higher resolution as compared to using a state or regional map and then zooming in.
Snotel data was switched from determining max min temperatures from the hourly (or less) reports, to using actual reported max mins from NOAA/Missoula. Prior to this time, the NOAA/Missoula actual max mins were in error but these were recently corrected. Therefore, in many cases prior to this date, our Snotel max's tend to be lower than actual, and min's tend to be higher than actual. Hopefully (as the weather is finally warming up) the existing past errors are small, cancel out to some degree, and occur only in non-agricultural areas. As with all weather networks, our site is a secondary data source, so please go to the primary sources or NCDC for climate data sets to use for purposes other than running pest models.

Revised and renamed US Degree-day mapmaker (to program with much better ability to support handheld devices, updated documentation, some new features, and some changes to the GRASSLinks interface. Now the optional legend link will open a new window with a custom legend for the newly created map, regardless of legend type. Formerly, only static legends had been prepared for legend types other than heat ramp, which is the default. The default image type was changed from the newer (and not as well supported) PNG format back to GIF, whereas an option was added to allow selection of either PNG, JPG, or GIF. A new animated GIF of degree-day mapmaker will display during the 10+ second wait required for map construction. The program will now work fairly well in browsers as small as 320 pixels wide, and has even been tested successfully from a Palm Treo 600. This will allow access to degree-days in the field anywhere in the coterminous USA (with some constraints).

Updated home page to reflect national focus of this website and to link in the new daily DD maps national index page; fixed a bug in some of the daily degree-day maps. We have yet to add historical average station files (other than Western US) to the system, so historical average DD maps will be less precise until this task is complete.

Recently repaired Medford and COOP network data feeds. RAWS was down at the source feeds 3/12-3/14, should be OK now.

Revised system for Medford data now back online and ready for testing. Close to 3600 stations total and national daily maps, degree-day calculations and models and DD mapmaking are now undergoing testing. For example, see North Central table or North Central daily maps.

OSU Weed Scientist Jed Colquhoun's new
small broomrape has been added. Data from NOAA were down for the last few days due to a data format and website change. The data are now being restored. Thanks for your patience.

National Weather Service forecasts have been integrated into the homepage and program. You can enter your city, state or zip code for the NOAA/NWS zone forecast, for weather forecast maps, quantitative precipitation forecast maps, and more, configured for the Northwest.

The downy brome model has been updated with the help of Sandy Frost and Dan Ball, OSU Pendleton. It now represents (and links to) a new publication by Ball, Frost, and Gitelman, Weed Science 52:518-524. 2004.

Due to personnel changes at Bear Creek Orchards, the public version of the Medford weather network may be down on occasion. The Medford Agrimet station remains representative of the region so you may want to use that one.

Please take a moment to fill out our new user survey, it will aid us in evaluation of this website. Added a table of sites available in the SW USA, consisting of 241 METAR stations, in the states CA, NV, UT, AZ, CO, NM, W. ND, W. SD, and W. NE. A map access page to DD calculations for both current and historical sites is linked from this page.

We have added around 500 historical (avg 1971-2000) weather stations to the system, from the states AZ, NM, AK, and S. Calif, for a total of 2084 historical sation records. SW US DD maps now utilize these data.

We have added a brief (10-question) user survey, please take a moment to fill this out if you use this site and would like us to continue to improve it. We plan to leave this survey up for only a short while, and may have other surveys in the future, as a way to gather feedback and to profile users of this website.

A new version of the main DD modeling/calculator tool, was deployed today. This new version, 3.50, provides a number of new features and fixes, including:

  1. National Weather Service 7-day forecasts for anywhere in the US (enter zipcode or city, state). Read here for details.
  2. In the output, above the NWS forecasts, the header line includes a link to the local zone forecast and current conditions formatted from National Weather Service reports, also anywhere in the US (not always available, depends on local NWS availability).
  3. The "simple header" feature now works. If you get tired of seeing/printing the logo and photos shown with certain models, click on "simple header" and they will not be displayed, both in the input form and in the output.
  4. The "bookmark/save model settings" feature has been improved. Now ALL settings (except a filename for file upload) are displayed in the web address, if you click the button under the model selection (or reselect the model, as it worked in the past), then you may bookmark (save Favorites) the settings, or make a hard link from a webpage. You could also use your browsers File, Send Link menu option (Netscape browsers) to email yourself or others the new link. This feature can save considerable time for those using the tool frequently.
  5. If you need to, you may now "clear all values" by clicking a button to the right of the "Calc" button.
  6. The instructions page has been expanded and provides more detail on using the calculator.

We moved to a new server during the first week of March, which produced several issues, most of which have been solved. The new server is ca. 2.4 times faster than the last, and will be much more scalable in the future. It is a dual Xeon 3.2 Ghz 2U rack server from HP. We are still trying to restore Medford grower data, and to initiate data from The Dalles and the Willamette Valley.

The NW degree-day mapping calculator now serves the 11 state W. region USA, and the DD Models Map shortcut also reaches the entire west.

Degree-day maps are now available for the 11 state W. region USA, using the new W. US NWS/Metar stations. Average data is still needed for S. CA, AZ, and NM for calculating the NORMAL and DEVIATIONS from NORMAL maps.

Ca. 335 Snotel stations (NRCS) for the 5 state NW have been added and are accessible from the state data tables and from the GIS/map interface to DD calculators. Also, ca. 240 W. US NWS/Metar (airport) stations have been added and most of these are accessible from the maps on the home page. Total station count is around 1400+ at this time. Plans to add grower stations from The Dalles and Willamette Valley (OR) networks are underway ... - Len

  What's New 2000-2003   What's New 1996-1999   Latest What's New

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. All responsibility rests solely with the people who interpret and implement information from this and other sources. Use this information with caution and at your own risk - 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 grants from the USDA-Western Regional IPM program.

On-line since April 5, 1996
Contact Len Coop at if you have any questions about this information.