In some greenhouses, western flower thrips are becoming more difficult to control due to high levels of resistance to some insecticides. Be sure to always rotate the modes of action of pesticides.

Biopesticides generally pose fewer risks than their chemical counterparts , making them a viable alternative for conventional and organic programs.

Bachman’s, a wholesale nursery and retail business based in Minnesota, has taken measures to address the steady decline of bees and other pollinators, including eliminating the use of neonicotinoids in some of its own production.

After two and a half years of research and trials, Jiffy has introduced The Preforma Orchid Plug. The propagation system is a six step concept developed by Jiffy to assist orchid growers in growing orchid young plants.

U.S. beekeepers lost more than a fifth of honey bee colonies this past winter — fewer than the winter before. Research shows there are fewer losses among beekeepers who carefully treat their hives to control a lethal parasite called the Varroa mite.

To demonstrate good environmental stewardship, growers need an understanding of the issues presenting risks to bees and of strategies to minimize the risks. Knowing where to find key product information and how to interpret it can help growers make sound choices regarding the application of effective products.

This is the second article of the four article series highlighting the production and use of pine wood chips as aggregates in greenhouse substrates.

Dr. Joe Bischoff, AmericanHort’s director of regulatory and legislative affairs, says it is important that we are informed and prepared to talk about the issue of pesticides, pollinators and the overarching concerns of bee health in a calm and clear manner. This is a topic where emotions can run high, and part of our role should be in explaining the need for balance and scientifically based solutions.

Cornell University researchers look at the impact cultural factors such as substrate amendments and substrate water-holding capacity have on fungus gnat populations.

A journey just over the United States’ border led Cascade Cuts of Bellingham, Wash., to begin using biocontrols. Alison Kutz, owner of Cascade Cuts greenhouses, explains the challenges and opportunities brought about with biocontrol implementation.

In recent weeks, several growers have contacted Michigan State University Specialists about leaf discoloration on geraniums, especially the purpling of lower leaves.

Greenhouse growers will be challenged by weather forecasts for cloudy and rainy conditions favoring Botrytis blight. Remembering cultural practices and correct fungicides will help until we get more sunshine.

The impact of systemic insecticides on bees and other pollinators is not new phenomenon. Kansas State University Entomology Professor Raymond Cloyd says we, as an industry, need to work together to provide unbiased information that is based in sound science.