Online Phenology Models and Degree-day Calculator
weed group
small broomrape (red clover)
weed model of Colquhoun. see Weed Handbook and model summary (pub in press)


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: small broomrape (red clover) Type: weed Model source/other links: Colquhoun. see Weed Handbook and model summary (pub in press) Calculation method: simp avg/grow Lower threshold: 32 degrees Fahrenheit Setting upper threshold to: 130 F (default) Directions for starting/BIOFIX: calendar date Starting/BIOFIX date: 1 1 No ending date, set to: default date 12 31 Model validation status: newly validated Region of known use: Western Oregon ==============================EVENTS TABLE================================ 1. 720 cumulative GDD after Jan 1 initial attachment to red clover 2. 1340 cumulative GDD after Jan 1 *NOTE:check herbicide pregrazing and preharvest intervals prior to any application 3. 1440 cumulative GDD after Jan 1 begin herbicide applic. window * 4. 1800 cumulative GDD after Jan 1 approx. end of herbicide applic. window * 5. 1980 cumulative GDD after Jan 1 small broomrape flower stalk emergence 6. 2160 cumulative GDD after Jan 1 beginning of red clover growth reduction because of parasitism ==============================MODEL OUTPUT================================ Weather station: 1000 none selected mn day max min precip DD32 CUMDD32 event -- --- ----- ----- ------ ---- ------- -------