Horticulture
Department
PACIFIC NORTHWEST NURSERY IPM
Insects
hidden treasure
Photo: Anonymous
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PACIFIC NORTHWEST NURSERY IPM Insects
hidden treasure |
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alder
flea beetle |
Thrips Thrips are insects in the order Thysanoptera. Western flower thrips, Frankliniella occidentalis, is one of several thrips that can be damaging to ornamental crops. During the summer months when nearby crops are harvested, large migrations of thrips into productions areas can occur. These populations of thrips can be large enough to cause extensive damage to susceptible plants, including terminal losses and stunting. We've had reported damage from Amelanchier, cherries, crabapple, hawthorn, Norway, red, and Japanese maples, mountain ash, purple leaf plum, and viburnum The University of Minnesota hosts a nice intro and key to identification of common thrips and also has another nice web publication for greenhouses: Western Flower Thrips in Commercial Greenhouses North Carolina State University's Insect Notes: Western Flower Thrips The Integrated Plant Protection Center, Oregon State University: Western Flower Thrips has information and phenology useful for Oregon growers. UC IPM Online Pests in the Landscapes and Gardens: Thrips has some very nice information on monitoring and management. From UC Riverside - Western Flower Thrips in Greenhouses: A Review of its Biological Control and Other Methods. An absolutely fantastic guide for those interested in biological control. The Online Guide to Plant Disease has great information
on managing two key viruses vectored by thrips: Impatiens
Necrotic Spot: New Name, Same Threat;
Impatiens -- Impatiens Necrotic Spot; Greenhouse
Plants, Ornamental -- Impatiens Necrotic Spot An examination of the literature and current research
efforts concerning thrips and virus management can be found at this Management
Strategies for Thrips and Tospoviruses The New Zealand Plant Protection Society has a useful website discussing Thrips insecticide resistance management and prevention strategy. Many of the strategies might be of use in our systems. Cal Ag's article on IPM Works in California Greenhouse Cut Roses discusses thrips management. A PDF with images can be downloaded from the site. Florida Department of Agriculture and Consumer Services pest alert: Chilli thrips Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) A new pest thrips for Florida Great images, information and links can be found at University of Florida chilli thrips website |
Terminal distortion and blackening on sugar
maple from thrips feeding
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| Website editor: Robin Rosetta |
