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: June 1968
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: VID00006
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

Newsletter No. 15

Citrus Station Mimeo Report CES 68-31
June 13, 1968




Harvesting and Handling Section
University of Florida
Citrus Experiment Station
P.O. Box 1088
Lake Alfred, Florida, 33850
(Complimentary to members of the Florida Fresh Citrus Shippers Association.
Others wishing to receive this newsletter, 'end a dozen stamped preaddressed
envelopes to the above address.).


No. 15 (*-*)
Citrus Station Mimeo Report CES 68-31
June 13, 1968

Harvesting and Handling Section



As far as we know, there will be no changes in the Florida Citrus Com-
mission Regulation 105-1.43, which requires fungicidal treatment of all fresh
citrus fruit shipped by registered packinghouses.

All diphenyl pads tested complied with the regulation, as did all samples
of fruit treated with fungicidal water wax solutions. However, when other
Dowicide A treatments were used, a number of low residue figures were encountered
during the early part of the season. Practically all houses complied with the
regulation by the middle of the 'Valencia' season.

Failure to meet the minimum fungicide requirement during the past season
when using fungicide formulations containing Dowicide A (sodium o-phenylphenate)
was observed to be usually due to either improper application of the fungicide
or to insufficient exposure time. It is important that the fruit be thoroughly
wet with this fungicide, whether applied as a water solution, foam, or with
soap in a sudser. It is recommended that the fruit be wet with Dowicide A for
at least 1-1/2 minutes. A 2-minute exposure time is better. (Exposure time
is the time between the application of the fungicide to the fruit and the time
it is rinsed off.) The manufacturer's recommendations should be followed, but
in any case, exposure time should be not over 5 minutes, in order to avoid pos-
sible injury to fruit. Use wipe-out equipment where necessary, particularly
on washers where some fruit may idle on the brushes for an extended time before

A thorough rinse is necessary after treatment with Dowicide A (except in
waxes) but do not rinse excessively. When Dowicide A-treated fruit is to be
given a color-add application, it is particularly important that the fruit
be rinsed thoroughly.

Double fungicidal treatments are unnecessary in most packinghouses. Usually
the first application, when properly applied, gives good decay control, and
the residue is well within the tolerance. When a wax is applied containing
Dowicide A or Dowicide I to fruit already treated with Dowicide A, the residue
may exceed the tolerance. Small sized oranges, tangerines, and other mandarin-
type citrus are more likely to exceed the tolerance than other citrus fruit
when given a double treatment.

Labeling.--Before ordering new shipping containers is a good time to take
a look at the labeling, including the fungicide labeling. The Federal Food and
Drug Administration requires that the chemical name of the fungicide, and why
it is used, be stamped on the container (see Packinghouse Newsletter No. 6A,
Harvesting and Handling Section, Citrus Experiment Station).

J. D. Dennis, Chemist
Division of Fruit & Vegetable
Winter Haven, Florida

Newsletter No. 15


The fungicidal value of Dowicide A-hexamine applied at room temperature
(700 to 780 F), 900 F and 1000 F has been compared using seven varieties
of citrus fruit this season. The same Dow-hex solution was used for the
three temperature comparisons. Fruit given a 2-minute flood treatment at
room temperature had the lowest decay and lowest Dowicide A residue. Com-
parable fruit gvWp. the same fungicidal treatment but at 1000 F had the
highest average-iecay and highest Dowicide A residue. Fruit treated at 90
F was intermediate between these two treating temperatures, both in decay
control and residue.

These results point out that residue from the Dowicide A-hexamine
treatment found in citrus fruit can be used to determine that the fruit
has been treated with Dowicide A, but the residue figure has no direct
relationship to the decay control that can be expected.

Application temperature.--Dowicide A-hexamine is more effective when
applied between 70 and 78' than at 90 F or 1000 F. When possible, apply
this fungicide in the 70 to 780 F temperature range.

Fungicides general.--For additional information on concentration
and methods of application, see Packinghouse Newsletters 1, 6 or 6A, 10,
and 13 or contact me at the Citrus Experiment Station, Lake Alfred.

F. W. Hayward Andrew A. McCornack
Harvesting and Handling Section Harvesting and Handling
(University of Florida) Section
(Florida Citrus Commission)


We have had inquiries from both manufacturers and shippers as to
what wood preservatives can be used for pallet boxes used in the grove.
This matter is subject to the Federal Food, Drug and Cosmetic Act because
such pallet boxes are "...wooden articles that are used...for...trans-
porting or holding raw agricultural products..." (F.R., Feb. 25, 1965,
Para. 121.2556). An effective wood preservative permitted for use with-
out limitation as to residues in the wood is copper-8-quinolinolate. To
check whether a wood preservative offered under a trade name contains an
effective formulation of copper-8-quinolinolate, request assurance that it
meets "Interim Federal Specification TT-W-00572a (AGR-FS) January 23, 1968,
Para. 1.2 Classification D." (This specification is from the Forest
Products Laboratory, Forest Service, U.S.D.A., Madison, Wisconsin.)


"Nobody Likes a Green Orange" by John E. Rice from Armstrong Trap Magazine
Vol. 37, No. 1, 1968. (This is a trade magazine story about the de-
greening room facilities at Lake Wales. We have a limited number of

June 13, 1968

Newsletter No. 15 -3- June 13, 1968

"Florida Scientist Advises: Communicate to Sell Citrus. Editorial from
The Packer, Vol. LXXIV, No. 49, page 2D, December 30, 1967.

"Consumer Packaging of Citrus Fruits," W. Grierson, International Citrus
Symposium, University of California, Riverside, March 1968. (Lithographed
copies are available from the author. This is a review of consumer pack-
ing research on citrus fruit including the work at Lake Alfred up to
January 1968.)

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