Online Phenology Models and Degree-day Calculator
redroot pigweed
weed model of CROPTIME weed model

Output from weed degree-day/phenology model program:
	Heat Units and predictions of key events from daily weather data
==============================MODEL INPUTS================================ Model species/general links: redroot pigweed Type: weed Model source/other links: CROPTIME weed model Calculation method: corn growing Lower threshold: 46 degrees Fahrenheit Upper threshold: 89 degrees Fahrenheit Directions for starting/BIOFIX: first emergence of cotyledon Starting/BIOFIX date: 6 10 No ending date, set to: default date 12 31 Model validation status: research model - not yet validated Region of known use: W. OR ==============================EVENTS TABLE================================ 1. 1 DDs after cotyledon: Cotyledon present 2. 121 DDs after cotyledon: 2 leaves present 3. 189 DDs after cotyledon: 4-5 leaves present 4. 277 DDs after cotyledon: 6-7 leaves present 5. 537 DDs after cotyledon: First flowering 6. 1004 DDs after cotyledon: Lower 95% CI first viable seed 7. 1078 DDs after cotyledon: Average first viable seed 8. 1152 DDs after cotyledon: Upper 95% CI first viable seed ==============================MODEL OUTPUT================================ Weather station: 1000 none selected mn day max min precip DD46 CUMDD46 event -- --- ----- ----- ------ ---- ------- -------