One new pest complete
Transcript of One new pest complete
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One new pest & One old way to control pests
Seminar for Volusia County Extension
Carol Cloud Bailey
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A palm in
trouble
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A palm in trouble
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A palm in trouble
• Phoenix canariensis located in Stuart Fl., east of US1 near the St Lucie River.
• It is at least 15 years old.• The irrigation system runs 3 X week, 20
minutes per zone. • The lawn service sprays for weeds when
needed.• The client has not applied fertilizer in over 3
years.
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A palm in trouble
• The decline was noticed in 3rd week of June.
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A palm in trouble• Three weeks
previously, FP&L dug a trench about 12” wide, 12 – 30” deep & about 10 feet from the trunk.
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• The palm dropped most of its fruit over the last few weeks.
• There was a lightening strike in the neighborhood. There are no wounds visible.
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A palm in trouble
• An email to Dr. Monica L. Elliott. Professor, Plant Pathology and Associate Center Director. Ft. Lauderdale Research and Education Center confirmed my supposition.
• There is probably a phytoplasma at work.
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Is it LY or TPPD?
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Does it matter?
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A palm in trouble• The symptoms described are typical for a
palm phytoplasma disease & they are:– fruit drop, flower death, more dead leaves than
normal – and missing spear leaf. However, can’t confirm in
this case.– Phoenix canariensis is susceptible to LY and
TPPD • The treatment for either disease is injection of
the antibiotic oxytetracycline HCl (OTC).• Susceptible palm species: Phoenix, Syagrus
and Sabal.
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One old way to control pest
Soil solarization
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Soil solarization
• Solar heating of moistened soil covered by a clear plastic film
• A nonchemical, hydrothermal used for soil disinfestation
• A look at a trial by Dan O. Chellemi, Ph.D. Plant Pathologist, USDA
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Soil Solarization
• Previous trial application to vegetable crops grown on raised, polyethylene-mulched beds (tomato, pepper, etc.)
• Current application to cut flower fields
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Proceedure
• Prepare beds for next crop• Install drip tape• Cover with UV-stable plastic• Seal edges with soil and glue• Keep soil very moist; irrigation applied
every other night• Leave plastic in place for 6 to 8 weeks
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Soil SolarizationPest control results from previous research
Pest Solarization Methyl bromide Nutsedge Good ExcellentOther weeds Spp. specific ExcellentFusarium Moderate ModerateSclerotium rolfsii Moderate ModeratePhytophthora blight
Poor Poor
Bacterial wilt Poor PoorRoot-knot nematode
Poor Excellent
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Soil Solarization
• Results reported by grower– Cost savings over
fumigation, $3,000 to $4,000 per acre vs $300 to $500 per acre
– Better control of some weeds
– Good community relations
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Thank You