Detecting Surprise Diseases

Detecting Surprise Diseases

Diseases are always on the move, and it’s impossible to predict which diseases will show up in the greenhouse. Growers can, however, learn from the diseases that show up elsewhere. At SAF Pest Management Conference next month, Colleen Warfield of the University of California will share information about unusual disease problems encountered in the last year. And she’ll tell you what to watch for in the year ahead.

What is the significance of your topic to growers?

“For most growing operations, it is fairly predictable that certain plant diseases will occur every year and on a particular crop. And wouldn’t it be nice if those were the only diseases we had to worry about?

“There are two things that the floriculture industry is really good at–introducing new plant materials and sharing plant pathogens. Of course, the sharing of plant pathogens certainly isn’t intended. In fact, an incredible amount of resources go into protecting and selling high quality plant materials.

“But just like the flu shot that may not protect you from all the viral strains that may come your way (think about that plane ride home during the holidays!), it is also unrealistic to believe that you can keep every plant pathogen at bay.”

So how can growers best arm themselves to protect their plants against obscure diseases? 
 
“The best protection you have for preventing disease losses is to arm yourself with information. Looking at what diseases were unusual, problematic, or more prevalent in the previous season is often a good indicator of what is to come. Any time you can recognize a disease problem sooner, the greater chance you’ll have for successful control.”

Can you give us a snapshot preview of what attendees can expect from your presentation?
    
“Most growers, understandably so, are not going to speak up in a public setting and say, ‘I lost 30 percent of my celosia crop last year due to some nasty, leaf spot disease. By the way, does anybody know what that was?’

“Instead, I think most growers would prefer to experience, in the privacy of their own mind, what I call ‘ah ha’ moments. I will be presenting and showing images of a diversity of plant disease problems that were confirmed by diagnostic labs in 2008. A cross-section of plant pathologists from around the country have generously shared some of their diagnoses with me.

“As a result, I think most growers will see at least one disease they encountered last year in their own operation; not necessarily something they submitted for diagnosis, but something they may have been curious about yet never had diagnosed.

“It may be comforting to know that your operation wasn’t the only one battling the problem. Misery loves company, right? It is not unusual for the same disease problem to show up in multiple greenhouses in a given region or even on a national scale. It can also be very beneficial for anyone working in the floriculture industry to know what diseases showed up on a given crop, or which were more prevalent last year. This information is particularly helpful for growers who are contemplating or planning to grow that crop this season.”

What are you most looking forward to about the conference yourself?  

“I can assure you I will be having plenty of my own ‘ah ha’ moments throughout the conference. This conference provides an incredible forum for the exchange of information and ideas between growers, industry reps, educators and researchers who all share a common interest. And the realization that each of these groups is critical for the continued success of our industry inspires a wonderful spirit of cooperation and collaboration. I wouldn’t want to miss it!”

Warfield is scheduled to present on surprise diseases from 1:30-2 p.m. on Saturday, Feb. 21. The conference takes place from Feb. 19-21 in San Jose, Calif.

For more information on Pest Management Conference, presented by Society of American Florists and Greenhouse Grower, visit www.pestconference.org.

Leave a Reply

More From Disease Control...
Botrytis Blight Geranium

May 10, 2017

A Refresher on Botrytis Management in the Greenhouse

When the weather is moist and humid, susceptible greenhouse plants may need to be protected from Botrytis cinerea, a fungus that causes leaf spots, blighting, and stem cankers.

Read More
Downy mildew sporulation on underside of leaf

May 5, 2017

New Bactericide/Fungicide from BioSafe Systems Helps Manage Foliar Diseases

BioSafe Systems has introduced PerCarb, a broad-spectrum bactericide/fungicide for use in greenhouse fruits and vegetables, as well as other crops.

Read More
Pythium

March 27, 2017

Florida Ornamental Growers Took a Hit in 2016 Thanks to Wet Weather

While damage figures from the 2015-2016 winter rains are still being compiled, researchers have found that Phytophthora and Pythium caused severe destruction in many plants.

Read More
Latest Stories
Botrytis Blight Geranium

May 10, 2017

A Refresher on Botrytis Management in the Greenhouse

When the weather is moist and humid, susceptible greenhouse plants may need to be protected from Botrytis cinerea, a fungus that causes leaf spots, blighting, and stem cankers.

Read More
Downy mildew sporulation on underside of leaf

May 5, 2017

New Bactericide/Fungicide from BioSafe Systems Helps Ma…

BioSafe Systems has introduced PerCarb, a broad-spectrum bactericide/fungicide for use in greenhouse fruits and vegetables, as well as other crops.

Read More
Pythium

March 27, 2017

Florida Ornamental Growers Took a Hit in 2016 Thanks to…

While damage figures from the 2015-2016 winter rains are still being compiled, researchers have found that Phytophthora and Pythium caused severe destruction in many plants.

Read More

March 20, 2017

AgBiome’s New Zio Biofungicide Receives EPA Regis…

The new biofungicide is the first product from AgBiome, and will be marketed by SePRO Corp. in the ornamentals market.

Read More

February 26, 2017

AgBiome Will Enter the Ornamentals Market With a New Bi…

AgBiome, a young company with teammates steeped in decades of experience in the crop protection world, sees an opportunity to bring products to market that fill the existing gaps in plant protection. The company has partnered with SePRO to market and distribute Zio, a biological fungicide expecting EPA registration this spring.

Read More
Tomato Spotted Wilt Virus on Osteospormum

February 23, 2017

4 Pathogens to Prepare For in 2017

Early detection of disease and virus symptoms in the greenhouse is critical. One expert says there are a few pathogens in particular that growers should be monitoring.

Read More
Boxwood Blight

February 7, 2017

Boxwood Blight Detection in Illinois Has Growers on Ale…

Symptoms of boxwood blight, which can spread quickly in production facilities, include leaf spots, stem cankers, and defoliation.

Read More
downy-mildew-impatiens-feature

December 24, 2016

How Agronomic Programs Can Help You Successfully Manage…

To prevent problems before they start, make an agronomic program an essential part of your production plan.

Read More

December 19, 2016

Funding Allocated for Several Horticulture Pest Researc…

The USDA Animal and Plant Health Inspection Service has allocated millions in funding to research plant pests such as boxwood blight, downy mildew, and phytophthora.

Read More
Phytophthora On Poinsettia

November 23, 2016

Tips On How To Prevent Aerial Blight Spread In Poinsett…

According to Michigan State University experts, certain species of the pathogen Phytophthora, which is typically thought of as a root rot, can also cause issues above-ground.

Read More
eric smith Biosafe

October 13, 2016

BioSafe’s New Hort Sales Rep Says Water Regulation And …

Eric Smith, BioSafe Systems’ New Horticultural Technical Sales Representative, has several years of experience that he says will help him when working with growers on critical issues facing them.

Read More
Downy mildew lesions on light coleus cultivars feature

October 4, 2016

Crop Protection Manufacturers Detail 2017 Early Order D…

Greenhouse Grower asked crop protection product manufacturers to send us the details for their 2017 Early Order Discount Programs and ongoing rebate programs, to provide you with a compiled knowledge resource of all discount offers at a time when you're making decisions for 2017.

Read More
tomato spotted wilt virus angular-necrosis-of-leaves-and-plant-stunting

September 28, 2016

Tips For Managing Tomato Spotted Wilt Virus In Mums

According to a report from Michigan State University, symptoms of tomato spotted wilt virus on chrysanthemum include yellow blotching and rings, necrotic lesions, and stem collapse.

Read More
Leaf Septoria In Cannabis

August 21, 2016

Three Diseases To Watch For In Cannabis Production

The development of root rot, powdery mildew, and leaf septoria can damage cannabis to the point of complete crop loss.

Read More
Downy mildew lesions on light coleus cultivars feature

August 12, 2016

How You Can Control Downy Mildew In Coleus, Roses, And …

Downy mildew diseases are potentially devastating to ornamental crops and at the very least can cause unsightly damage. Check out the latest research and recommendations for preventing it.

Read More
BASF Orkestra Intrinsic

June 21, 2016

New Mode Of Action From BASF Offers Deeper Disease Cont…

When it comes to disease control, you need all the help you can get. BASF recently hosted growers, Extension personnel, and trade media to present its newest fungicide with two active ingredients, offering dual modes of action.

Read More
Triathlon BA container shot

May 24, 2016

OHP’s Triathlon Biofungicide Now Listed By The Organic …

Triathlon BA is a broad-spectrum preventative biofungicide that provides control of many foliar and soilborne diseases in ornamentals and herbs.

Read More
Pythium On Chrysanthemum

May 20, 2016

How To Prevent Pythium In Fall Garden Mums

Avoid profit loss in fall garden mums due to pythium root rot with good drainage and integrated pest management practices that reduce risk factors.

Read More