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Central Florida Landscapes ENEWS
April 2015
In This Issue...
Olive Gall on Loropetalum chinense
On The Lookout: Bagworms on Indian Hawthorn
Urban Pests and Pest Management
Upcoming Events...
UF/IFAS Extension Promise
UF/IFAS Extension provides practical education you can trust, to help people,
businesses and communities solve problems, develop skills and build a better future.
Specialist Update
Thursday, April 9, 2015
8:00am-1:00pm
UF/IFAS Extension Orange County
Get the dirt from our UF Specialists in this final class of our Landscape U series.
CEUs Available! To register, click here!
8:00 - 8:30 am - Registration
8:30 - 9:20 am - Insect Management Update - Dr Catharine Mannion
9:20 - 10:00 am - Nematode Management Update - Dr. Billy Crow
10:00 - 10:20 am - Break
10:20 - 11:10 am - Weed Management Update - Dr. Ramon Leon
11:10 - 12:00 pm - Disease Management Update - Dr. Shad Ali
CEUs - 4 Commercial L&O, Ltd. L&O, Ltd. Landscape
Maintenance, Natural Areas, Private Ag., Right of Way
Olive Gall on Loropetalum chinense
An article on olive gall on Loropetalum originally
appeared in the Enews in July 2013. Since that time, the
disease has become more prevalent in Central Florida.
This bacterial gall disease, Pseudomonas savastanoi,
is characterized by formation of irregular areas of darkcolored callus tissue or 'knots' on the main stem and later
shoots on loropetalum. The most noticeable symptom of
bacterial gall is shoot
dieback, dark colored,
rough surfaced galls or
plant death. Eventually, the galls enlarge until a lateral
branch or main stem is encircled and girdled, which then
results in the appearance of dead shoots or plant death,
respectively. Wounds attributed to pruning and
harvesting cuttings as well as frost or hail are likely entry
points for the causal bacterium P. savastanoi.
There is no chemical control for this disease. In the
landscape, establishment of healthy loropetalum is the
best defense against olive gall. Prior to planting,
loropetalum should be examined thoroughly for limb and
main stem cankers. On diseased plants, removal of
galled lateral branches may help slow disease spread. Cuts should be made several
inches below the gall or canker. Pruning tools should be dipped before each cut in dilute
isopropyl alcohol or similar disinfect to avoid accidently introducing the causal bacterium
into the wound. Best time to prune out galled shoots would be during extended periods of
dry weather in the spring or fall. Making several protective copper fungicide/bactericide
applications after pruning may further slow disease.
You can view a fact sheet from the Alabama Cooperative Extension here.
On The Lookout: Bagworms on Indian Hawthorn
Bagworms can feed on many different
plants, and Thyridopteryx
ephemeraeformis (also called the
evergreen bagworm, common bagworm
or eastern bagworm) can feed on over 50
families of deciduous and evergreen trees
and shrubs. Severe infestations can
damage the aesthetics and health of host
plants, especially juniper and arborvitae
species. More recently, they have been
seen on Indian hawthorn.
Adult bagworms will often go unnoticed in the landscape, especially the female, because
she is enclosed in her bag and inside of her pupal casing throughout her life. Throughout
the U.S., the common bagworm has one generation per year and overwinters in the egg
stage inside the female's pupal case. Common bagworm larvae hatch in late spring and
early summer and may disperse with the wind via silken threads.
Initial feeding damage on evergreen trees causes branch
tips to appear brown and unhealthy. As the larvae become
larger, their feeding damage becomes more apparent.
During the summer, larvae can cause severe defoliation
and even death, especially on evergreen species because
their leaves are not replenished as readily as those of
deciduous trees.
Cultural control: Handpicking bagworms and placing them
in a bucket with soapy water or a sealed bag is an effective
control method when populations are low and individuals
can be reached easily. Handpicking is most effective from
late fall to early spring before adults reproduce and new
bagworm larvae disperse.
Photo by Roi Levin
Chemical control: Insecticide control should be aimed at
young larvae. Penetration with insecticides can be challenging due to the protective bag.
When feeding slows later in the season, control with insecticides may not be effective.
Natural controls: The common bagworm is attacked by at least 11 species of parasitic
wasps.
You can view entire publication here.
Urban Pests and Pest Management
The warm southern states provide an ideal environment for
a wide variety of pests. This 5-page fact sheet introduces
integrated pest management practices that can help reduce
pesticide use in and around the home. It is excerpted from
SP486: Pests in and around the Southern Home, which is
available for $30 from the UF/IFAS Extension Bookstore.
View the fact sheet here.
View all the fact sheets in the book here
Purchase the book here.
Upcoming Events
Visit our website for registration forms and class information
http://orange.ifas.ufl.edu/cflandscapes
or register online at the links provided below
2015 Central Florida Pesticide Training Schedule is available - click here to view!
First Thursday of every month at 8:30am - Online Commercial Pesticide Applicator
License Testing at UF/IFAS Extension Orange County. 8:30am-12:30pm. Pre-registration
required. Must bring a valid picture ID and voucher.
Obtain a voucher and register at: https://pesticideexam.ifas.ufl.edu
April 8 - Weed Management for Greenhouse, Nursery & Landscape Businesses
at Mid-Florida Research & Education Center, Apopka / 8:30am-1:00pm / 3 CEUs
available in Private Ag & Ornamental/Turf!
Registration
April 9 - Landscape U - Specialist Update at UF/IFAS Extension Orange County,
Orlando / 8:00am-1:00pm / CEUs Available!
Registration and full agenda
April 9 & 10 - The 3rd Annual Native Plant Show by the Florida Assn. of Native
Nurseries at Osceola Heritage Park Exhibition Building, Kissimmee / 8:00am / CEUs
Available!
Registration
April 16 - Review & Exams for Ornamental/Turf and Private Ag Applicator at
UF/IFAS Extension Orange County, Orlando / 8:00am-4:00pm / CEUs available!
Registration
May 6 - CEU Day & Worker Protection Standard Train the Trainer at Mid-Florida
Research & Education Center, Apopka / 8:00am-3:00pm / CEUs available!
Registration
May 14 - Review & Exams for Limited Certification Pesticide Applicator Licenses at
Osceola County Extension, Kissimmee / 8:00am-4:00pm / CEUs Available!
Registration
UF/IFAS Extension Orange County Classes & Events
Do you want to find out what else UF/IFAS Extension Orange County has to offer? Click
the logo below to see class schedules and up-to-date information on horticulture,
agriculture, family & consumer sciences and 4-H. Visit us to find Solutions for Your Life!
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relevant info about all things Landscape - the new, the old, and the unusual, as well
as answers to your gardening questions! Join the conversation with our Residential
Horticulture Agents and other garden enthusiasts!
Until Next Time,
Celeste
Celeste White
Commercial Landscape Management
UF/IFAS Extension Orange County
6021 S. Conway Rd
Orlando, FL 32812
Phn: 407-254-9210
Fax: 407-850-5125
http://orange.ifas.ufl.edu/cflandscapes
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