Monday, July 06, 2015

Home News Reports of geranium bacterial blight in Wisconsin

Reports of geranium bacterial blight in Wisconsin

Pests & Diseases

Symptoms include leaf necrosis and yellow halos

| May 7, 2012

The University of Wisconsin Plant Diagnostic Disease Clinic (PDDC) reports that a Minnesota geranium (Pelargonium) supplier has been infected with Xanthomonas. A grower from central Wisconsin sent seven geranium samples of different varieties received from a Minnesotan supplier and all tested positive for this pathogen. One of the samples looked appeared to be healthy, but upon close inspection one leaf appeared water-soaked along the veins and showed up positive for Xanthomonas.
 
This pathogen is usually associated with contaminated, fresh or dried leaf material. It can survive on leaf surfaces at low populations and be asymptomatic until environmental conditions suddenly change, the populations suddenly increase and symptoms appear. Symptoms include leaf necrosis and yellow halos.
 
Overhead irrigation can promote the spread of the pathogen through water droplets. Anything touching contaminated plant debris should be disinfested with 10 percent bleach, 70 percent alcohol or ammonium-containing products. Any infected plants should be discarded and pots should not be reused.

The PDDC is able to perform a fast test for Wisconsin growers who suspect they may have Xanthomonas and results can quickly be made available.
 
For more information on geranium bacterial blight, click here. For more information on the PDDC, click here.



 

Top news

The Growing Edge: Inside the hiring process

A New York growing operation discusses the challenges of finding qualified job candidates, the hiring process and life as a startup.

Supplementing with microgreens

Quick turnaround time, surging popularity with consumers and an ability to combine with other crops have made microgreens a favorite for growers looking to supplement their production.

Dümmen Orange acquires Florexpo

The acquisition includes the move of top Florexpo talent and management to Dümmen Orange’s new production site in Guatemala.

Cucumbers: What you need to know

What’s their turnaround time? Which disease plagues cucumbers most frequently? Which system should you grow them in?

The perfect pop of color

The new Lollipop Impatiens series boasts 95 percent germination, excellent vigor and branching, and vibrant colors.

x