Online Phenology Models and Degree-day Calculator
sunflower stem weevil
insect model of Merrill et al 2010

Output from insect degree-day/phenology model program:
	Heat Units and predictions of key events from daily weather data
==============================MODEL INPUTS================================ Model species/general links: sunflower stem weevil Type: insect Model source/other links: Merrill et al 2010 Calculation method: simp avg/grow Lower threshold: 41 degrees Fahrenheit Upper threshold: 110 degrees Fahrenheit Directions for starting/BIOFIX: calendar date Starting/BIOFIX date: 1 1 No ending date, set to: default date 12 31 Model validation status: partly validated Region of known use: W. Great Plains ==============================EVENTS TABLE================================ 1. 472 DD after biofix 5% adult emerg. from stalks; begin scouting adults 2. 972 DD after biofix 50% adult emerg. from stalks 3. 1183 DD after biofix 75% adult emerg. from stalks 4. 1399 DD after biofix 90% adult emerg. from stalks ==============================MODEL OUTPUT================================ Weather station: 1000 none selected mn day max min precip DD41 CUMDD41 event -- --- ----- ----- ------ ---- ------- -------