Cornell greenhouse pest management resources:

• Cornell Guide for the Integrated Management of Greenhouse Floral Crops
• Integrated Pest Management for Bedding Plants
• Pest Management Guide for Production and Maintenance of Herbaceous Perennials

• Gallery of Greenhouse Pests and Diseases
• Greenhouse Insect Pest factsheets
• Beneficial Insects in the Greenhouse
• Identifying Insects on Yellow Sticky Cards
• Sampling Plan for Whiteflies on Poinsettias [32K .pdf factsheet]
• Suggestions for Managing Insecticide Resistance in the Greenhouse - A paper by John Sanderson that addresses managing insecticide resistance and includes a 'Mode of Action' table for insecticides and miticides used in the greenhouse.

Diseases:

• Gallery of Greenhouse Pests and Diseases
• Disease factsheets
• Diseases of specific crops
• Impatiens Downy Mildew info:
  • Fact Sheet for Landscapers
  • In Home Gardens
  • Review for greenhouse growers
  • Labeled Fungicides
  • Alternatives Plants to Garden Impatiens
  • Video from Exposure to Collapse
  • Pictures of Symptoms

Links - some of the following links are to resources that could be helpful in learning more about insects or how to control them

• Labels/MSDSs
• Insectaries/Beneficials
• Cornell's Department of Entomology Extension Program