The Manufacture of Tomato Products: Including whole tomato pulp or puree, tomato catsup, chili sauce, tomato soup, trimming pulpHier, W. G. (Wayland Gladstone)
Science
The Manufacture of Tomato Products: Including whole tomato pulp or puree, tomato catsup, chili sauce, tomato soup, trimming pulp
Hier, W. G. (Wayland Gladstone)
Tomato products
There are many forms of rot, but the most common are the black rot, soft
rot, and the mold growths in cracked tomatoes, either those which have
cracked deeply around the stem end during their growth, or have been
cracked or mashed in shipment. Just as soon as the skin is broken,
either in a natural or unnatural way, molds start growing on that broken
surface immediately, and develop very rapidly.
There is also the brown spotted tomato, which is not so common, but
which has been very bad in some localities. I remember one field of
tomatoes in southern Ohio several years ago which was absolutely
worthless for canning purposes, due to the fact that practically all of
the tomatoes were covered with brown spots, and under each one of these
spots was a lump of white mold and mold spores. This field was plowed up
before half of the tomatoes were picked, as the pulp plant which had
contracted them refused to receive any more after having cooked several
batches of pulp on which the mold ran very high due to this condition,
which had never been met with before. The brown spots were soft and
concave, and if once the character of the spot was fixed in the memory
one could never fail to quickly detect that type of tomato if it was run
across again.
The disease appeared in both central and southern Indiana the following
year and I sent samples of the tomatoes to the Department of Agriculture
at Washington and to the Indiana state experiment station, but it was
new to them and they had no remedy for it. Whether it has appeared since
I do not know, but it was very bad while it lasted. It is almost
impossible to sort such tomatoes, as the spots are so numerous on the
surface, and every spot would have to be cut out. When the spots are
small, as they frequently are, they are very apt to pass by the sorters
unnoticed, or at any rate considered harmless, but it doesn’t take many
bushels of such tomatoes to send a batch over the limit in mold count.
Extremely soft spots which will yield to very slight pressure with the
finger are usually receptacles for the growth of yeasts and bacteria and
should be cut out. Nine times out of ten such spots are offensive to the
nose when the skin of the tomato is broken. However, one quickly learns
to pick them out by sight.
It is important that the sorting belt be well lighted with 100–watt
lamps overhead provided with large reflectors. On dark days good sorting
is impossible unless the belt is adequately lighted, and, of course, for
sorting in the early morning or late evening adequate light is
absolutely essential.
Cleanliness of Equipment
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