District of Columbia USA Weather Data, Plant Disease Risk and Degree-Day Models All Available Networks - other tables for DC include: CWOP/APRS, see our homepage.

Interactive degree-day maps Degree-day & Phenology Model Calculator  Also try the full-featured calculator/DD model (NW states only) Select model:  Degree-Day Calculator enter your own thresholds apple maggot 1st emerg [cherry, apple] Jones 1989 apple maggot % emerg [cherry, apple] Jones 1989 apple scab infec seas [apple] Gadoury et al. 1995 barley P. Miller, MSU bertha armyworm [vegetables] Bailey 1976 black cutworm [vegetables] Luckmann et al. 1976 brown marmorated stink bug [multiple] cabbage looper [vegetables] Toba etal 1973 corn earworm [sweet corn] Hartstack et al. 1976 western cherry fruit fly [cherry-E. of Cascades] Jones et al. western cherry fruit fly [cherry-W. of Cascades] AliNiazee chick pea (Desi not Kabuli) P. Miller, MSU codling moth [apple & pear] Brunner & Hoyt 1987 codling moth revised 06 [apple & pear] Knight 2007 codling moth no biofix WSU Jones et al. 2008 cereal leaf beetle [grasses and grains] Fulton et al. 1975 cabbage Maggot - Dreves 2005 newsletter (pdf) canola (Argentine) P. Miller, MSU canola (Polish) P. Miller, MSU canary P. Miller, MSU downy brome Dan Ball emerald ash borer [ash] McCullough and Siegert (2006) early blight of potato eur. pine shoot moth [nursery crops] Regan 1990 european grapevine moth [grapes] UC Napa Extension (2010) cougarblight (fire blight) [apple & pear] Smith 1998 filbertworm [hazelnut] Aliniazee (1983) flax P. Miller, MSU fruittree leafroller [tree fruits, ornamentals] Judd et al. gypsy moth egg hatch Russo et al. (1993) gypsy moth larvae and pupae Carter et al. (1992) gypsy moth full model simplified from Sheehan hop downy mildew season initiation (Gent et al. 2010) isomate-c+ Pacific Biocontrol Corporation Data Lacanobia fruitworm [apple & pear] Brunner 2003 lentil (intermediate P. Miller, MSU Lygus bug [alfalfa seed] Ben Simko 2000 Metaseiulus occidentalis Tanagoshi et al. 1975 mint flea beetle Berry et al. mint root borer Berry et al. mustard J (Brown and Oriental) P. Miller, MSU mustard (Yellow) P. Miller, MSU Neoseiulus fallacis Dover et al. 1979 oat P. Miller, MSU obliquebanded leafroller [tree fruit] Brunner 1997 obliquebanded leafroller [hazelnut] Gang.; Ali. 1985 orange tortrix (cold winter) [small fruit] Knight 1988 orange tortrix (mild winter) [small fruit] Knight 1988 oriental fruit moth [stone fruit] CA IPM: Rice et al. Pandemis leafroller [tree fruits] Brunner (1991) Pea (yellow-determinate or indeterm) P. Miller MSU Peach twig borer [stone fruits] 2007 USU Extension pear scab infec seas [pear] OSU Hd Rvr/Bob Spotts pecan nut casebearer [pecan] 1988 NMSU Safflower (Saffire) P. Miller, MSU San Jose Scale [tree fruits] Rice et al. (1982) small broomrape (red clover) J. Colquhoun spotted wing Drosophila [fruits] sweet corn [Jubilee] Coop et al. (1993) Sunflower (depends on maturity class) P. Miller MSU sunflower stem weevil [sunflower] Merrill et al. 2010 Sugarbeet Root Maggot Bechinski et al. 1990 strawberry root weevil [mint] Cacka 1982 strawberry rt weev [strawberry] Umble Fisher 2002 variegated cutworm [mint] Coop & Berry 1987 walnut husk fly [walnut] Kasana & AliNiazee 1997 western bean cutworm [corn and beans] Neb. Wheat R P. Miller, MSU winter wheat Karow et al. 1993 Thresholds: lower: °F   upper: °F (or celsius °C:)   Calc. method: simple average growing dds single triangle double triangle single sine double sine heating dds cooling dds potato p-days Start (biofix) date:  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31  End date:  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31   same year following year Forecast zipcode or city, state: Statewide Disease Alert Maps: tomato-potato Smith late blight, Tomcast DSV, fire blight, soybean rust Disease Alert Movies: fireblight: 2010 Data table - to SORT click on headers:

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All data provided "as is" and users assume all risk in its use - see full disclaimer. All NWS derived data is not subject to copyright protection. This site hosted by the Integrated Plant Protection Center at Oregon State University with support from the USDA National Plant Diagnostic Network, various USDA NIFA and RMA grants, and USDA IPM Centers - Western Region. Climate map data provided by OSU PRISM Group, realtime public weather data provided by U. Utah Mesowest and various other networks.
This site on-line since April 5, 1996; last update Jan. 11, 2012
Contact Len Coop, OSU IPPC and Botany & Plant Pathology Dept. at coopl@science.oregonstate.edu or 541-737-5523 if you have any questions about this information.