Group Title: Lake Alfred AREC Research report
Title: Packinghouse newsletter
Full Citation
Permanent Link:
 Material Information
Title: Packinghouse newsletter
Series Title: Lake Alfred AREC Research report
Alternate Title: Citrus packinghouse newsletters
Packing house newsletter
Physical Description: v. : ill. ; 28 cm.
Language: English
Creator: Citrus Experiment Station (Lake Alfred, Fla.)
Citrus Experiment Station (Lake Alfred, Fla.)
Agricultural Research and Education Center (Lake Alfred, Fla.)
Citrus Research and Education Center (Lake Alfred, Fla.)
Indian River Research Education Center
Publisher: Citrus Experiment Station
Place of Publication: Lake Alfred Fla
Lake Alfred Fla
Publication Date: October 1970
Copyright Date: 1965
Frequency: irregular
completely irregular
Subject: Citrus fruits -- Harvesting -- Periodicals -- Florida   ( lcsh )
Citrus fruits -- Packing -- Periodicals -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
periodical   ( marcgt )
Additional Physical Form: Also issued on the World Wide Web.
Dates or Sequential Designation: No.1 (Sept. 1, 1965)-
Issuing Body: Issued by the Citrus Experiment Station (no. 1-38); Lake Alfred (Fla.) Agricultural Research and Education Center (no. 39-136); Lake Alfred (Fla.) Citrus Research and Education Center (no. 137-189); and the Ft. Pierce (Fla.) Indian River Research and Education Center (no. 190- ).
General Note: Title from caption.
General Note: Latest issue consulted: No. 202 (Aug. 1, 2005)
 Record Information
Bibliographic ID: UF00095555
Volume ID: VID00023
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 02430250
lccn - 2006229390

Full Text

ewsletter No. 33
Citrus Station Mimeo Report CES 71-11
October 19, 1970
750-WFW-Lake Alfred, Florida 33850

Editor: W. F. Wardowski
Harvesting and Handling Section*
University of Florida
Citrus Experiment Station
S F P. O. Box 1088
Lake Alfred, Florida 33850




kComplimentary to members of the
Florida Fresh Citrus Shippers Association. c
Others wishing to receive this newsletter
may send a dozen stamped, preaddressed C gg I w
envelopes to the above address. O

Newsletter No. 33
Citrus Station Mimeo Report CES 71-11
October 19, 1970
750-WFW-Lake Alfred, Florida 33850

Harvesting and Handling Section



Following considerable discussions on the subject, the following extracted
information regarding the labeling of citrus fruit treated post-harvest with
pesticide has finally been received in writing from the office of the director
of field coordination of the Federal Food & Drug Administration in Washington:

1. (The law). Section 403(1) of the Food, Drug, & Cosmetic Law states
that a food shall be deemed to be misbranded if it is a raw agricultural
commodity which is the produce of the soil, bearing or containing a
pesticide chemical applied after harvest, unless the shipping container
of such commodity bears labeling which declares the presence of such
chemical in or on such commodity and the common or usual name and the
function of such chemical: Provided, however, that no such declaration
shall be required while such commodity, having been removed from the
shipping container, is being held or displayed for sale at retail out
of such container in accordance with the custom of the trade.

2. (The interpretation). When individual bags are packed into master cartons
for shipment, only the master carton must bear the declaration required
by Section 403(1). If on the other hand, the bags are not packed into
other containers, but are shipped individually, each individual bag
becomes a "shipping container" which must bear the required declaration.

This means that for the 5 and 8 lb. bags of citrus which are packed in bag-
masters, the name(s) and function of the fungicide(s) need appear only on the
bagmaster. Loose bags shipped within the state, and all boxes, must continue to
bear the required declaration.
George F. Westbrook
Chief, Bureau of Technical Control


Several people have inquired about the rates of ethylene to use in the new
large pallet box degreening rooms. The following table, which will appear in
the degreening bulletin now being revised, gives this information, both as bubbles/
minute and for various types of flowmeters now in use. The use of this information,
plus continuous ventilation and use of an analyzer to check the concentration of
ethylene, will enable the operator to maintain a level of ethylene in degreening
rooms between 1 and 5 parts per million. Remember--too much ethylene increases
stem-end rot decay and shortens the life of the fruit without increasing the
degreening rate. (An ethylene analyzer and supply of sampling tubes can be
obtained for less than $100. Bill Strickland's office can supply information on
supplier, catalog numbers, etc.)

Newsletter No. 33


High relative humidity is necessary to maintain good fruit quality during
degreening. A 1 to 20 spread between wet and dry bulb thermometers indicates
that you are maintaining the recommended 92% to 96% relative humidity providing
the thermometers are placed where a steady current of room air passes over them.

We advise the use of automatic temperature and humidity controls. For these,
the placing of the sensing units is critical. The thermostat (for temperature)
should be in the discharge air before it reaches the fruit. The humidistat (for
humidity) should be in the return air on its way back to the radiator.

Steam is commonly used to maintain the humidity in degreening rooms, but
it also raises the temperature. In the early part of the degreening season,
outside temperatures are high and the temperature cannot be maintained consis-
tently at 850 F or below. This is the maximum temperature allowed in degreening
rooms by the addition of heat (Florida Citrus Code, Regulation 105-1.13). The
exception to this regulation is that steam may be used to raise relative humidity
in degreening rooms. High humidity must be maintained even though room temperatures
go into the 90's. Low relative humidity will increase stem-end rind breakdown
and stem-end rot decay.

Flow rates for ethylene to establish a degreening atmosphere of
1 to 5 ppm ethylene and minimum CO2.a

Size of roomb Ethylene flow rate as
Field Pallet Bubbles/ cc or ml/ liters/ cu ft/
boxes boxes minc min hour hour
500 50 50 12.5 0.75 0.025
1,000 100 100 25 1.5 0.05
2,000 200 200 50 3.0 0.1
5,000 500 500 125 7.5 0.25
10,000 1,000 1,000 250 15.0 0.5

aTo be combined with continuous ventilation to keep C02 below 0.1% in
the room atmosphere.
bEthylene delivery should be proportional to the size of the room but
not to the load in the room.
Bubbles from 1/4-inch line in a standard FMC trickle unit.

W. Grierson
Citrus Experiment Station
A. A. McCornack
Florida Department of Citrus

October 19, 1970

Newsletter No. 33


One of the highlights of the annual meeting of the American Society for
Horticultural Science at the Carillon Hotel in Miami Beach will be a symposium
to be held after the opening session, Monday, November 2. This is sponsored
by the Committee for Coordination With Industry and entitled, "A Challenge to
Research to Meet the Future Needs of Industry." One of the threats to American
horticulture, as seen by the CWI Committee, is that increasing specialization of
both research workers and horticultural industries is proving a threat to communi-
cations between executives and business managers in horticultural industries who
will be encountering ever-changing problems and the research workers who should
be preparing solutions to the problems before they prove too costly,

The speakers, each of whom is well known for his role in industry or
research, have been drawn from all over the United States and from every branch
of horticulture. The Keynote address will be given by Dr. John Carew, Head
of the Department of Horticulture at Michigan State, and well known for his work
in vegetable research in the United States and in foreign aid projects abroad.
The needs of industry in relation to genetics, plant breeding, and variety
selection will be presented by Mr. E. Wilbur Scott of the Joseph Harris Company,
Inc., seedsman from Rochester, New York. Industries future needs for research
information on culture methods will be presented by a speaker from the other side
of the country, Mr. Fred Heringer, a major fruit and vegetable producer and vice-
president of the California Farm Bureau Federation.

Mr. Leon Miller of Duda and Sons, Oviedo, Florida, and a director of the
National Produce Packaging Association, will discuss the problems to be foreseen
in postharvest handling of vegetables. The equivalent picture will be presented
for fruits by Mr. Ray Floate of the Michigan Fruit Canners, Inc., Benton Harbor,

The increasingly prosperous field of ornamental floriculture will not be
forgotten because the entire program is to be summed up by a noted Floriculturist
and research worker, Dr. Neil W. Stuart of the USDA Plant Industry Station,
Beltsville, Maryland, and a former president of the American Society for
Horticultural Science,

Ample time is being scheduled for discussion; and it is hoped that attendance
will include not only members of the American Society for Horticultural Science,
but also representatives of the vast horticultural industries of Florida, all of
whom have built their present prosperity on the findings of research and whose
support, advice, and participation are going to be most essential for future
horticultural research, not only in Florida, but nationally.
W. Grierson
Citrus Experiment Station


A revised citrus maturity chart that supplements Agricultural Extension Ser-
vice, IFAS, University of Florida, Circular 315, "Quality Tests for Citrus Fruits,"
has been printed and made available by a commercial company. See the Available
Publications list in this Newsletter.

October 19, 1970

Newsletter No. 33


Available from Harvesting & Handling Section, Citrus Experiment Station,
P. 0. Box 1088, Lake Alfred, Florida 33850.

"Citrus Fruit Maturity 1970-71." A chart to supplement Circular 315, "Quality
Tests for Citrus Fruits" (June, 1967). This chart includes recent changes in
maturity standards for Florida citrus.

"Perspectives Nouvelles Offertes Par Les Fongicides D'erives Du Benzimidazole Dans
le Traitment Des Agrumes." by E. Laville. Fruits d'Outre Mer 25(5):337-339.
1970. As "New Prospects for Treating Citrus Fruits Offered by the Benzimidazole-
Derived Fungicides." Translated by W. Grierson.

"Ninth Annual Packinghouse Day Program and Abstracts." Mimeo Report CES 71-4,
September 9, 1970.

"Degreening Citrus Fruits." by W. Wardowski. Citrus & Vegetable Magazine.
October, 1970.

"Twenty-first Annual Citrus Processor's Meeting." Mimeo Report CES 71-7,
October 8, 1970.

October 19, 1970

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