Title: Production times
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 Material Information
Title: Production times
Physical Description: Serial
Language: English
Publication Date: Summer 2009
 Record Information
Bibliographic ID: UF00090492
Volume ID: VID00010
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.

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ProductionTimes UNIVERSIT



E Greenhouse Edition IFASExtension


Summer 2009
Volume 16, Number 2


Production Times is brought
to you by:



Lelan Parker, M.S.
Orange County
Greenhouse/Foliage
Multi-County
(407) 254-9220
FAX (407) 850-5125

This material is provided as one of the
many services relating to the educational
programs offered to you by this agency.
Our statewide network of specialists is
prepared to provide current information
on agriculture, marketing, family and
consumer sciences, 4-H, marine science,
and related fields. We will be happy to
help you with additional information
upon request.

Use of trade names in this newsletter does
not reflect endorsement of the product by
the University of Florida, Institute of Food
and Agricultural Sciences, or the Florida
Cooperative Extension Service.



Visit us at:
http://cfextension.ifas.ufl.edu


Worker Protection Standard
By Lelan D. Parker

The Worker Protection Standard has been in place since 1995. It was
designed to protect agricultural workers and pesticide. Employers must
make sure that workers are notified where pesticide applications are
being implemented or where restricted-entry intervals are in effect. Em-
ployers have the choice of warning workers orally or written. If pesti-
cide labels do not include language that require the use of posted signs
warning workers then an oral warning is all that is needed. However,
some pesticides require that you notify workers orally or with signage
posted at entrances of treated areas. Warnings are in effect for workers
who are or will be within a quarter of a mile of the treated area.

Notifications in Greenhouses
You must post all treated areas in greenhouses, with exceptions of those
below:
Oral warnings need not be given to:
* Any worker in your greenhouse who will not be in the treated area
or walk 14 mile of a treated area, during the pesticide application or
while the restricted-entry interval is in effect.
* Any worker who will not be in your greenhouse during a pesticide
application or while a restricted entry level is in effect.
* Any worker who applied (or supervised) the application and is
aware of all of the information required to be given in the oral
warning.
Treated area posting is not required if:
* No workers in your greenhouse who will not be in the treated area
or walk 14 mile of a treated area, during the pesticide application or
while the restricted-entry interval is in effect.
* No workers will be in the greenhouse during the pesticide applica-
tion or while the restricted-entry interval is in effect there.


(Continued on Page 2)


PEST ALERT! New Exotic Soft Scale Insect on Croton in South Florida (Hemiptera: Coccoidea: Coccidae) The Divi-
sion of Plant Industry collected this new-to-science record at a nursery last year in Monroe County, FL. The host plant
was croton (Codiaeum variegatum (L.) Blume). No natural enemies have been found at this time. For more information
go to: http://www.doacs.state.fl.us/pi/enpp/ento/coccoidea-coccidae.html


"The Foundation for the Gator Nation" an Equal Opportunity Institution.







(Continued from Page 1)


* The only workers for whom you need to post applied (or supervised) the application the pesticide and are
aware of all the information required to be given in the oral warning.

Posted Warning Signs
Use WPS-design signs when you post warnings at entrances in treated areas. If posting fumigant applica-
tions, use fumigant warning signs as shown below:


Timing and visibility of warning signs:
Post signs 24 hours or less before the scheduled application of the pesticide.
* Keep signs posted during application and throughout the restricted-entry interval (if any).
* Remove the signs within 3 days after the end of the restricted-entry interval. If there is no restricted-entry
interval for that application, remove the signs within 3 days after the end of the application.
* Keep workers out during the entire time the signs are posted (except for trained and equipped early-
entry workers entering as permitted under WPS).
* Keep signs visible and legible while they are posted.

Oral warnings must include:
* Location and description of treated area,
* Time during which entry is restricted, and
* Instructions not to enter the treated area until the restricted-entry interval has expired.


For more information go to:
http://edis.ifas.ufl.edu/pdffiles/PI/PI14400.pdf







L Chilling Damage in Spathiphyllum
By Lelan D. Parker

Spathiphyllum is one of the most popular ornamental foliage plants.
However, like most plants with tropical origin it is very sensitive to
chilling temperatures. A chilling temperature is one that is cold
enough to cause injury to a plant but not cold enough to freeze the
plant. Usually chilling temperature ranges from just above 320 F to 590
F. A large cause of losses in foliage plant production, transportation,
and interiorscaping has been due to chilling injury. Chilling injury
also makes plants more susceptible to disease pathogens. The picture
below shows a Spathiphyllum that was vulnerable from cold temperatures which led to the infection
of Anthracnose.

Symptoms of chilling injury in Spathiphyllum usually begin from the leaf tips and edges and pro-
gresses inward with injured leaf areas becoming necrotic, turning black and finally dying. Usually
visual signs appear when plants are exposed to 380F or 450F for 5 days. Generally, mature leaves are
more sensitive to chilling than young leaves. Therefore, chilling injury can be lessened if preventa-
tive measures are taken to reduce the severity of the duration of chilling or both. Depending upon
temperatures, chilling injury can be either visible or invisible. The delay in plant growth is an indi-
cation of invisible injury when Spathiphyllum is exposed to 500F.

For more information go to:
http://edis.ifas.ufl.edu/pdffiles/EP/EP10100.pdf



E Troubleshooting for Unrooted Cuttings

1) Leaves appear yellow in propagation within first week.
A. Postharvest period was too long or too warm.
B. Cuttings were dehydrated after sticking.
2) Leaves or cuttings are mushy upon arrival.
A. Freeze damage.
3) Leaves or cuttings are mushy shortly after sticking.
A. Erwinia may be present.
B. Postharvest period too long or too warm.
4) Leaves are discolored upon arrival or shortly thereafter.
A. Physical damage.
B. Cold damage. Erwinia on Spathiphyllum







SPlant Clinic Problem: Cold Damage


With the recent cold weather a few months ago
many growers are seeing the effects of cold
damage to plants. Two of the crops hardest hit
were spathiphyllum and orchids. Cold damage
symptoms may appear at any time. Leaves may
be scorched because cold severely dehydrates
plant tissue. Symptoms may also appear as
foliage and flowers turning reddish, brown or
black at the leaf base and margins. Moreover,
plants become less resistant to disease pathogens
once affected by cold temperatures. Entire plants
may be killed. Remember to scout your green-
Co ld damaged orchid
house for cold damage symptoms.


For all plant clinic diagnosis go to:
http://cfextension.ifas.ufl.edu/agriculture/plant_clinic/index.shtml




Upcoming Programs

April
29 Horticulture Best Management Practices for Water Conservation & Treatment
Location/Time: Wimauma, FL 10 am 4 pm
Registration: http://Hillsborough.extension.ufl.edu/Ag/AgPubs/Tampa_Program.pdf
30 BMPs in English and Spanish
Location/Time: Orange County Extension, Orlando
Registration: Contact Yamira Donato at 407-254-9214 or visit http://landscape.ifas.ufl.edu
May
13 Greenhouse BMPs
Location/Time: Mercer Botanicals, Zellwood, FL from 10 am -12 pm
Registration: Contact Lelan Parker at 407-254-9200

June
7-9 Florida State Horticultural Society Annual Meeting
Location/Time: Wyndham Riverwalk in Jacksonville, FL
Registration: http://www.fshs.org/meetings.htm




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