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Output from uspest.org/wea weed degree-day/phenology model program:
Heat Units and predictions of key events from daily weather data
==============================MODEL INPUTS================================
Model species/general links: lambsquarter, CROPTIME models
Type: weed
Model source/other links: CROPTIME weed model, Croptime project
Calculation method: single sine
Lower threshold: 42 degrees Fahrenheit
Upper threshold: 95 degrees Fahrenheit
Directions for starting/BIOFIX: first emergence of cotyledon
Starting/BIOFIX date: 6 10
Ending date: 7 0
Model validation status: research model - not yet validated
Region of known use: W. OR
==============================EVENTS TABLE================================
1. 1 DDs after cotyledon: Cotyledon present
2. 75 DDs after cotyledon: 2 leaves present
3. 173 DDs after cotyledon: 4 leaves present
4. 273 DDs after cotyledon: 6 leaves present
5. 596 DDs after cotyledon: First infloresc.
6. 1360 DDs after cotyledon: Lower 95% CI first viable seed
7. 1462 DDs after cotyledon: Average first viable seed
8. 1564 DDs after cotyledon: Upper 95% CI first viable seed
==============================MODEL OUTPUT================================
Weather station: 2017 E4431 APRSWXNET EW4431 Mesa AZ Lat33.4472 Long:-111.8081 Elev:1260
mn day max min precip DD42 CUMDD42 event
-- --- ----- ----- ------ ---- ------- -------
6 10 102.00 69.00 0.00 42.10 42.1 * START * Cotyledon present
6 11 99.00 71.00 0.00 42.35 84.4 2 leaves present
6 12 93.00 65.00 0.00 37.00 121.4
6 13 97.00 58.00 0.00 35.31 156.8
6 14 104.00 61.00 0.00 38.71 195.5 4 leaves present
6 15 109.00 68.00 0.00 42.89 238.4
6 16 109.00 70.00 0.00 43.79 282.2 6 leaves present
6 17 110.00 68.00 0.00 43.04 325.2
6 18 112.00 73.00 0.00 45.49 370.7
6 19 117.00 76.00 0.00 47.21 417.9
6 20 119.00 79.00 0.00 48.51 466.4
6 21 116.00 85.00 0.00 50.50 516.9
6 22 112.00 81.00 0.00 48.79 565.7
6 23 111.00 80.00 0.00 48.31 614.0 First infloresc.
6 24 115.00 77.00 0.00 47.44 661.5
6 25 115.00 86.00 0.00 50.80 712.3
6 26 110.00 82.00 0.00 49.03 761.3
6 27 109.00 81.00 0.00 48.54 809.8
6 28 109.00 75.00 0.00 46.00 855.8
6 29 108.00 75.00 0.00 45.88 901.7
6 30 110.00 77.00 0.00 46.98 948.7
Forecast using: 1910 E4431 PRISM_rev1_4km 2007-2016 AVERAGES Lat33.4472 Long-111.8081 DD50
lambsquarter CROPTIME weed modelLocation: 2017 E4431 EW4431 Mesa AZ 1910 E4431 PRISM_rev1_4km 2007-2016 AVERAGES Date | DDs | Event |
6-10-17 | 42 | Cotyledon present |
6-11-17 | 84 | 2 leaves present |
6-14-17 | 195 | 4 leaves present |
6-16-17 | 282 | 6 leaves present |
6-23-17 | 614 | First infloresc. |
3-16-17 | 1389 | Lower 95% CI first viable seed |
3-18-17 | 1463 | Average first viable seed |
3-21-17 | 1577 | Upper 95% CI first viable seed |