Online Phenology Models and Degree-day Calculator
immatureadult
Japanese knotweed psyllid, Aphalara itadori [weed biocontrol]
insect model of OSU IPPC model analysis CABI abstract


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: Japanese knotweed psyllid, Aphalara itadori [weed biocontrol] Type: insect Model source/other links: OSU IPPC model analysis CABI abstract Calculation method: single sine Lower threshold: 43 degrees Fahrenheit Upper threshold: 95 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: under development Region of known use: US ==============================EVENTS TABLE================================ 1. 420 DDs after Jan 1 First appearance of spring adults 2. 551 DDs after Jan 1 OW adult 2% egg-laying 3. 799 DDs after Jan 1 OW adult 20% egg-laying 4. 1596 DDs after Jan 1 OW adult 90% egg-laying 5. 2167 DDs after Jan 1 Gen. 1 adult 2% egg-laying; peak G1 nymphs 6. 2415 DDs after Jan 1 G1 adult 20% egg-laying 7. 3212 DDs after Jan 1 G1 adult 90% egg-laying; max. 3 gens. 8. 3783 DDs after Jan 1 G2 adult 2% egg-laying; peak G2 nymphs 9. 4031 DDs after Jan 1 G2 adult 20% egg-laying 10. 4828 DDs after Jan 1 G2 adult 90% egg-laying; max. 4 gens. 11. 5399 DDs after Jan 1 G3 adult 2% egg-laying; peak G3 nymphs 12. 5647 DDs after Jan 1 G3 adult 20% egg-laying; max. 5 gens. 13. 6444 DDs after Jan 1 G3 adult 90% egg-laying 14. 7015 DDs after Jan 1 G4 adult 2% egg-laying; peak G4 nymphs; max. 6 gens. 15. 7263 DDs after Jan 1 G4 adult 20% egg-laying 16. 8060 DDs after Jan 1 G4 adult 90% egg-laying 17. 8182 DDs after Jan 1 Max. 7 generations ==============================MODEL OUTPUT================================ Weather station: 1000 none selected mn day max min precip DD43 CUMDD43 event -- --- ----- ----- ------ ---- ------- -------