Willamette Valley

150-250 day season; warm days, cool nights; length of season may very considerably from year to year

Development of corn earworm, Heliothis zea, on corn in Oregon



  • Refine corn earworm monitoring techniques using pheromone and black light traps.
  • Continue developing a statewide pheromone trapping program.
  • Study earworm flight and infestation trends that can be used to predict damaging infestations.
  • Develop corn earworm and sweet corn development models.
  • Conduct insecticide trials to determine if and when sprays are most effectively used.
  • Incorporate relevant information into a damage prediction model that can be used for management purposes.

Performance of Nitrogen Liquid Fertilizer Solutions in Broccoli Used to Enhance Weed Control


Grower interest in nitrogen fertilizer sprays for weed control has raised questions about the relative effectiveness of various materials and the contribution these materials make toward the nitrogen nutrition of the crop. A research program established in 1988 evaluated weed control and crop response with four plantings of broccoli.

Maturity and yield characteristics of cauliflower: effects of transplant characteristics and culture.



  • To elucidate the effects of transplant culture and characteristics on the maturity and yield of a cauliflower crop.
  • To describe differences among sources of transplants in timing of curd initiation, rates of leaf initiation and unfolding, and rate of curd growth in order to better understand the relationship between the yield and maturity of cauliflower, and its growth and development.
  • To elucidate aspects of transplant handling, and field culture after transplanting that affect maturity and yield of cauliflower.