Commercially Available Biological Control Agents for Common Greenhouse Insect Pests (December, 2015)
This 6-page fact sheet provides information and photos on commercially available beneficial organisms (parasitoids, predators, and beneficial nematodes) and their target pests. It was developed by Heidi Wollaeger (MSU Extension), Dr. Dave Smitley (MSU), and Dr. Ray Cloyd (Kansas St. Univ.).
Growing Flowering Plants that are Safe for Pollinators in the Yard and Garden (October, 2014)
This Microsoft PowerPoint presentation was developed by Dr. Dave Smitley, entomologist at MSU. It presents information on the neonicotinoid crisis that faces the ornamental plant industries, discusses the decline in bee colonies, and presents recent research-based information on the subject at MSU and other institutions.
Pest Management on Poinsettias (July, 2014)
MSU entomologist Dave Smitley presents information on pest management of poinsettia with notes about products that contain neonicotinoid insecticides.
Protecting Pollinators in the Yard and Garden (April, 2014)
Written by entomologist Dave Smitley, this pdf document provides answers for garden centers to four commonly asked questions about bees and neonicotinoid insecticides.
Greenhouse Insect Management (January, 2014)
Dave Smitley summarizes the key points of controlling greenhouse insect pests. The chemicals that have been found to be effective in research trials are listed for all the major common greenhouse insects: thrips, aphids, whiteflies, mites, broad mites, fungus gnats, and mealybugs/soft scales.
Insect Controls for the Greenhouse Industry (February, 2012)
This poster-sized "wall chart" lists of all insecticides registered for use in Michigan that are labeled to control greenhouse insect pests including aphids, broad mites, fungus gnats, leafminers, mealybugs, scale insects, spider mites, thrips and whiteflies. The main chart includes chemical classes, active ingredients, formulations, EPA registration numbers, REI, signal words, and any safety or phytotoxicity considerations listed on the label. Brand names of products with the same formulations and active ingredients are also listed. Developed by MSU's Terry Davis and David Smitley.
Pesticide Storage and Handling Guidelines for Greenhouses (January, 2011)
This self-assessment tool helps greenhouse growers evaluate how effectively their pesticide storage and handling practices protect groundwater and surface water resources. Developed by Jeanne Himmelein (MSU Extension) and Linda Zibak (Michigan Water Stewardship Program).
Recent Plant Pathology Reports
The research reports below have been written by Mary Hausbeck and summarize her lab's work with pathogens on greenhouse crops. Information is provided on managing Alternaria, Botrytis, Myrothecium, Phytophthora, poinsettia scab, powdery mildew, Rhizoctonia, and Thielaviopsis on greenhouse crops.
In addition, articles and research summaries about common greenhouse pathogens can be found online using the links below:
Impatiens downy mildew
MSU Diagnostic Services
Do you have a plant pest or disease, or suspect a plant virus? Have it diagnosed by submitting a sample to MSU Diagnosic Services. Visit this site to learn about what services are provided, how to submit a sample, and the cost for each service.
Other Floriculture Crop Production Information pages: