YouTube video of UF/IFAS/TREC/FEPDC Dr. Aaron Palmateer's presentation "Avoid spreading disease through your irrigation system part 1: Effect of water on plant health".
Wednesday, March 20, 2013
Tuesday, February 5, 2013
Botryosphaeria Dieback of Eugenia, Ligustrum, Oleander, Pittosporum, Viburnum ’Awabuki’ and Wax Myrtle
Eugenia (Syzgium paniculatum), Ligustrum (Ligustrum japonicum) , Oleander (Nerium oleander), Pittosporum (Pittosporum tobira), Viburnum (Viburnum odoratissimum ’Awabuki’) and wax myrtle
(Morella cerifera) are six ornamental plants common to South Florida landscapes. Dieback of these
plants are sometimes attributed to the fungus Botryosphaeria. Disease symptoms includes yellow, spotted and blighted leaves, dried leaves, defoliations, cankers, tip diebacks, branch diebacks, and often
death of the entire plant. Plants in a hedge row are often randomly affected with no discernable pattern.
Disease symptoms may be present at any time of the year.
View or Download complete publication:
Stephen H. Brown, Horticulture Agent
Lee County Extension, Fort Myers, Florida
(239) 533-7513 brownsh@ufl.edu
Brown’s Webpage
Thursday, January 31, 2013
Webinar: Impatiens Downy Mildew, Dr. Aaron Palmateer
 |
| Downy Mildew on Impatiens walleriana in South Florida |
GPDN Webinar series 2013
Seminar Title: Impatiens Downy Mildew
Speaker: Dr. Aaron Palmateer, University of Florida - IFAS/TREC/FEPDCWebinar Link: http://connect.ksre.ksu.edu/p52039748/
Webinar series main page: http://www.gpdn.org/webinar_2013
Friday, July 6, 2012
Sampling for Laurel Wilt
Jonathan H. Crane, Tropical Fruit Crop Specialist
May 23, 2012 (Download PDF - Click Here)
Sampling declining trees
1. Equipment: pruning hand saw or hatchet, plastic zip-lock bags, permanent marker, gloves, disinfectant (Pine-Sol, 1 oz in 8 oz water), flagging tape and latex paint.
2. Information on the plastic sampling bag:
a. Date
b. Your name
c. Name of grove
d. Location of the tree (row, tree number)
e. Cultivar (variety) of avocado.
f. Write the words “Laurel Wilt sample”
3. Take a sapwood sample. The sapwood is the first 2-4 inches of wood just under the bark. Healthy sapwood is white to off-white in color. Unhealthy sapwood has dark brown to bluish to black streaks in the sapwood.
a. Where on the tree to sample? First look to see where the canopy is showing signs of decline and then look for evidence of beetle holes – try to sample in these areas.
b. Sampling options
• Sample by hatchet. The bark of avocado trees can be thick (1/2 to 1 inch or more). The outer bark is rough and greyish colored and the color of the inner bark is pink. Remove the outer and inner bark until you see either dark-stained (streaked) wood. Once sapwood is exposed take chips of the symptomatic (brown-streaked) sapwood and place in the bag for analysis. We need about . cup or so of this wood.
• Sample by hand-saw. Removing the bark is not necessary. Cut a wedge-shaped (<) piece of wood such that the pointed end extends several inches into the sapwood. We need 1 to 2 pieces.
c. Paint the wound made by the sampling with a thick coat of latex or oil-based paint to discourage additional beetle infestation. Spray paint will not inhibit beetle boring.
d. Sanitize the hatchet or hand-saw after each sample to prevent the spread of the disease. Examples of disinfectants include 1) 25% chlorine bleach (3 parts water and 1 part bleach; 2) 25% pine oil cleaner (3 parts water and 1 part pine oil); 3) 50% rubbing alcohol (70% isopropyl; equal parts alcohol and water); 4) 50% denatured ethanol (equal parts alcohol and water); 5) 5% quaternary ammonium salts. There are ammonium chloride based disinfectants (i.e. Green-Shield® or KleenGrow™) that are good disinfectants for cleaning tools. Do not mix quaternary ammonia products with bleach.
e. Take the labeled sample or samples to the TREC Plant Diagnostic Clinic at 18905 S.W. 280 St., Homestead, FL 33031. Please fill-in the sample form sheet at the clinic. The charge is $40.00.
f. The analysis should be completed within 10 business days of sample delivery.
Tuesday, May 15, 2012
Disease Control & Plant Health Strategies in Ornamentals
PDF - Click Here
PDF - Click Here
Professor Emeritus of Plant Pathology
University of Florida, MREC
Assistant Professor of Plant Pathology
University of Florida, TREC
Perennial Solutions Consulting
AGENDA:
8:00–8:50 a.m. – Registration
8:50–9:00 a.m. – Introduction (BASF)
9:00–9:30 a.m. – What is Plant Health (BASF)
9:30–10:20 a.m. – Plant Health: Trial Results and Significance to Greenhouse and Nursery Operations – Paul Pilon
10:20-10:30 a.m. – Break
10:30-11:30 a.m. – Ornamental Disease Management & Update – Dr. Ann Chase
11:30-12:30 p.m. - Disease Management in Ornamental Nurseries – Dr. Aaron Palmateer
12:30 p.m. – Lunch - sponsored by BASF
4 REGIONAL SEMINARS OFFERED!!!
June 26, 2012 at the UF/IFAS Miami-Dade County extension office, Homestead
June 27, 2012 at the Palm Beach County UF/IFAS extension office, Palm Beach
June 28, 2012 at the Gulf Coast Research and Education Center, Wimamua
June 29, 2012 at the Mid Florida Research and Education Center, Apopka
CLICK BELOW FOR FREE REGISTRATION
Disease Control & Plant Health Seminar
Sponsored By:
Friday, March 30, 2012
Monday, March 5, 2012
Downy Mildew on Impatiens
Check out:
Downy Mildew on Impatiens FactSheet (Stay tuned for new management recommendations)
University of Florida / IFAS Palm Beach County Cooperative Extension Service
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