ET-140 February 1939
United States Department of Agriculture
Bureau of Entomology and Plant Quarantine
AN IMPROVED METHOD OF LABELING JELLY-GLASS REARING CONTAINERS
By A. H. Madden,
Division of Truck Crop and Garden Insect Investigations
The writer has devised a method of labeling jelly-glass
rearing containers that is superior to the usual method of writing
on such containers with a wax pencil. Jelly glasses are used in an
inverted position extensively to confine tobacco hornworms when
reared over screens which allow frass to drop through. This method,
which can be employed satisfactorily only when the glasses are used
in an inverted position, is described below.
Strips, 9.1 inches long and -l inches wide, are cut from
press-board. A narrow slot, 1- inches long, is cut in the center
of each strip, and the ends of the strips are fastened together with
two metal staples so that they form rings of the proper size to
fit tightly around the middle of the jelly glasses (half-pint size).
Triangular-shaped tabs or labels of the proper size to fit the slots
in the rings are cut from stiff paper, the ends of the tabs being
rounded to permit rapid insertion into the slots. The desired data
are written or printed on the paper with waterproof India ink, the
tabs are placed in the slots, and the rings are pressed down firmly
over the glasses. The parts of the label and a labeled glass are
shown in figure 1.
The tabs and rings can be prepared in advance of the rearing
season, and as the rings are durable they will last for several
years. The tabs are discarded after being used once, but a fresh
supply may be prepared quickly. Some of the advantages of this
method are the following: (1) Since the tabs and rings are prepared
in advance, labeling can be done very quickly during the busy sea-
son. (2) There is little likelihood of the legend becoming il-
legible. (3) Labels may be changed quickly when necessary.
Figure 1.-A, paper tab; B, pressboard ring; C, Jelly glass with
label in place.
UNIVERSITY OF FLORIDA
3 1262 09239 4872