Peat moss may fall on cards and appear to be an insect. Look closely with a hand lens to distinguish bits of debris from thrips.
Photo by Leanne Pundt
Thrips on yellow sticky card.
Photo by John Sanderson
Fungus gnat compared to shorefly adult.
Photo by Leanne Pundt
Fungus gnat adult.
Photo by Leanne Pundt
Shorefly adult. Photo by Leanne Pundt
Banded -winged whitefly adult Photo by Leanne Pundt
Banded-winged whitefly adult compared to greenhouse whitefly and fungus gnat adult.
Photo by Leanne Pundt
Moth flies or drain flies on sticky card. These flies are just a nuisance in the greenhouse. They breed in areas with poor drainage. Note the fringed wings. Shorefly adults, also a nuisance on cards. Photo by Leanne Pundt
Using sticky cards in the greenhouse.
Double clothespins are used to raise the card as the crop grows. Photo by Leanne Pundt
Fungus gnats and shoreflies on card. Use a 10-20x handlens to look for distinguishing characteristics. Photo by Leanne Pundt