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Greenhouse Pest Monitoring with Yellow Sticky Cards

  Date*Natural Enemy IntroducedQuantity
December 14 Nematodes 2 million
January 11 Nematodes 1 million
January 16 Nematodes 2 million
February 13 Nematodes 2 million
March 16 Nematodes 6 million
April 18 Nematodes 6 million
May 7 Mites - Amblyseius cucumeris 500 sachet bags
May 14 Trichogramma wasps 1000
May 16 Nematodes 25 million
July 9 Encarsia formosa - Nile strain 5000

*Biological control of insect pests in a Virginia tomato greenhouse of 3500 square feet. Yellow sticky cards (3" x 5") were used to monitor fungus gnats (6 cards near bag level) and thrips (4 cards near plant canopy). The number of pests is the average captured per card per day.