INTRODUCTION
As degree-day models for specific insects and plants are placed on-line, appropriate documentation will be placed in this page. Wherever possible, the original published references have been used to prepare this documentation. In some cases, data are too new to have been published and will be presented here or within linked pages. In other cases, the summary information prepared by the University of California at Davis has been repeated here if appropriate.

Disclaimer: No claims are made as to the correctness or appropriateness of this information for your particular needs. No specific pest control products are intended for endorsement or use. This responsibility rests solely with the people who interpret and implement information from this and other sources. Use all predictive information with caution - errors occur, and predictive models do not replace the need for proper monitoring in the field. If you observe conditions that differ substantially from model predictions, please contact us to determine if the model inputs were incorrect, if the model functioning or weather data are in error, or if the model is inappropriate for your conditions.

OTHER MODEL REFERENCES AT: none available at this time

MODEL SUMMARY VERSION: L. B. Coop, B. A. Croft, and R. J. Drapek. 1993.
Model of Corn Earworm (Lepidoptera: Noctuidae) Development, Damage,
and Crop Loss in Sweet Corn. J. Econ. Entomol. 86(3): 906-916.

LOCATION OF STUDY:  Willamette Valley, Oregon
DEVELOPMENTAL THRESHOLDS
  LOWER:  50.0F  (10.0C)
  UPPER:  86.0   (30.0)
METHOD OF CALCULATION:  Growing Degree-Days
CUTOFF METHOD:          Substitution (similar to horizontal cutoff)
DEGREE-DAY ACCUMULATIONS REQUIRED FOR EACH STAGE OF DEVELOPMENT
  BIOFIX:  Date of Planting (input by user or default date of May 1)
		   
                                         DD (F)     DD (C)
  FIRST EMERGENCE FROM SOIL              104.0       57.8
  5 LEAF STAGE                           308.0      171.1
  7 LEAF STAGE                           445.0      247.2
  9 LEAF STAGE                           617.0      342.8
  11 LEAF STAGE                          772.0      428.9
  5 INCH TASSELS                         883.0      490.6
  10 INCH TASSELS                        960.0      533.3
  5% SILK EMERGENCE                     1005.0      558.3
  50% SILK EMERGENCE                    1062.0      590.0
  95% SILK EMERGENCE                    1145.0      636.1
  50% BROWN SILKS DEVELOP               1288.0      715.6
  95% BROWN SILKS DEVELOP               1412.0      784.4
  FRESH MARKET HARVEST                  1539.0      855.0
  PROCESSING MARKET HARVEST             1597.0      887.2