Online Phenology Models and Degree-day Calculator
immaturedamagepupaadult
corn earworm [sweet corn]
insect model of Hartstack etal 1976


Output from uspest.org/wea insect degree-day/phenology model program:
	Heat Units and predictions of key events from daily weather data
==============================MODEL INPUTS================================ Model species/general links: corn earworm [sweet corn] Type: insect Model source/other links: Hartstack etal 1976 Calculation method: single sine Lower threshold: 55 degrees Fahrenheit Upper threshold: 92 degrees Fahrenheit Directions for starting/BIOFIX: first silk Starting/BIOFIX date: 8 1 No ending date, set to: default date 12 31 Model validation status: partly validated Region of known use: Pacific Northwest ==============================EVENTS TABLE================================ 1. 73 DD after egglaying (near 1st silk) egg hatch begins 2. 220 DD after egglaying (near 1st silk) larvae reach 3rd instar 3. 329 DD after egglaying (near 1st silk) larvae reach 5th instar 4. 437 DD after egglaying (near 1st silk) larvae exit ears to pupate 5. 760 DD after egglaying (near 1st silk) adults begin to emerge from soil 6. 873 DD after egglaying (near 1st silk) adults begin to lay eggs ==============================MODEL OUTPUT================================ Weather station: 1000 none selected mn day max min precip DD55 CUMDD55 event -- --- ----- ----- ------ ---- ------- -------