View All: Articles

March 15, 2011
In this issue, we present a summary of diseases that occur in campanula. Remember: Product controls are based on research trials and do not reflect an endorsement of any sort. Please click on the PDF below to learn about diseases affecting campanula.
February 22, 2011
Clean cuttings, young plants or plugs — this has been a discussion point for many years in our industry. It also has been a topic of tension between customers and suppliers. In this article, the idea is to try getting some positive thoughts and...
February 22, 2011
Please click on the PDF to the right to learn more about the diseases affecting hedera.
January 27, 2011
Please click on the PDF to the right to learn more about diseases affecting asiatic lily.
December 21, 2010
Please click on the PDF version to the right to read about the diseases highlighted in this issue.
November 30, 2010
While seemingly unpredictable, resistance is manageable once its principles are better grasped and preventative best practices are put in place. For growers, understanding resistance realities improves the health of plants and maximizes pesticide...
November 04, 2010
Please click on the PDF version to read about the diseases highlighted in this issue.
April 12, 2010
As an entomologist, I have been trained to know what a whitefly is, but to my layman friends, a whitefly is a white…fly. Their first thought is of a larger insect like a housefly. When I describe a real whitefly, they recognize it as something they...
September 03, 2009
Chrysanthemum white rust is caused by the fungus Puccinia horiana. Chrysanthemums are the only type of plant infected by this rust fungus, but the disease can spread rapidly in a greenhouse or nursery, resulting in severe product losses. CWR is...
August 07, 2009
Greenhouse producers are continually seeking alternative means of dealing with insect and mite pest populations, instead of relying solely on insecticides or miticides, to avoid resistance. A “potential pest management strategy” is the application...
June 30, 2009
Throughout my more than 30 years as a plant pathologist, I have been asked many times to talk or write about diagnosing diseases. This is always challenging and often rather frustrating. The most recent request was made for the February 2009 SAF...
April 09, 2009
“Do what we can, summer will have its flies.” — Ralph Waldo Emerson For growers, working to keep pests away from crops has always been accepted as part of the game. However, the playing field might be shifting. As experts sound the alarm regarding...
April 09, 2009
In European greenhouses, conventional spraying with output quantities of 500-1,500 liters, or even more, of spraying liquid per 21⁄2 acres is still widely used. But scientific advances, practical experience and increasing awareness of environmental...
April 09, 2009
Don’t feel listless if pests keep attacking: Here are two lists to help you determine why you have a problem and why your current methods aren’t working. Pest Power Most pests that attack and damage plants in greenhouses are likely to be hard to...
January 26, 2009
What are some notable developments in the field of pest management? James Bethke: I think that one of the best things that has happened in the last couple of years is when my colleagues and I put together a great pesticide management program for...
December 11, 2008
Pesticides — in this case, insecticides and miticides — are used primarily to control arthropod pests encountered in greenhouse production systems. These include greenhouse whitefly, sweet potato whitefly B biotype, green peach aphid, two-spotted...
October 16, 2008
Entomopathogenic nematodes (EPN) are used as biological control agents to regulate a variety of insect pests. The two most commonly used and commercially available genera, Steinernema and Heterorhabditis, have a broad insect host range and can kill...
August 11, 2008
Most visitors to eastern Long Island are surprised to see so much agriculture here and how beautiful it is, expecting to see miles of shopping malls and housing developments. While I can’t say it is pastoral in the sense of dairy or corn country, we...
July 14, 2008
My research at Cornell’s Long Island Horticultural Research & Extension Center often focuses on oomycetes, because the diseases they cause are so ubiquitous in greenhouse flower culture. As part of my extension work, I sleuth out the causes for...
June 11, 2008
When it comes to low-volume chemical application in the greenhouse, growers have a variety of options to choose from — from mist blowers to targeted low volume sprayers. Coverage is everything. Even the most effective new pesticide is useless unless...