* , *".',o *■ ' ’•? i,'/' r '••(-r.'lji } >■> *r t s
12—Lancaster Farming, Saturday, March 18, 1972
Mrs. Judith Gould, plant science ozone chamber to test plant response to
research assistant at the University of air pollution
Delaware, checks the operation of the
What’s New?
Air Pollution Tester
Air pollution damages your
backyard petunias just as much
as it hurts the farmer’s crop.
And now, an inexpensive ozone
chamber will show what air
pollution looks like and which
plants will be hurt most.
The portable chamber was
developed by University of
Delaware plant science
researchers, under the direction
of Dr. Donald J Fieldhouse,
associate professor, to test plant
reaction to ozone m the field.
Ozone is the major cause of air
pollution damage on the East
Coast, according to Mrs Judith
Gould, research assistant, and
Frederick Wiebel, graduate
student.
Car exhaust fumes are the
primary source of ozone.
However, it is formed high in the
atmosphere so pollution from
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large cities like Philadelphia and
Baltimore can affect plants a
hundred miles away.
Exactly how ozone injures
plants is not yet known, the two
researchers admit. “But the
effects are obvious—and they
differ from one kind of plant to
another. Watermelon leaves
show white specks, potatoes show
black spots and beans, red,” Mrs.
Gould says.
Damage even changes from
one variety to the next. We know,
for instance, of one potato variety
which shows no effects while
another, exposed to the same
ozone concentration, develops
white specks and has a lower
yield, she adds.
We take the “box” in the field,
dose a few plants with a con
trolled ozone level, and check
what happens. It’s the easiest
way to screen for resistant
varieites, since we don’t have to
wait for highly polluted air to hit
the field naturally, Wiebel says.
“We’re also checking several
chemical sprays that seem to
protect plants. However, the ones
we’re testing only work for a
short time.”
The “box” is easily put
together and, in all, it costs less
than $lO. However, ozone and
By far, the lowest cost feeder-bunk
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stallation. Expert engineering allows
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tenance because its unique design
virtually eliminates moving parts (no
auger, feeder chain or belt).
Your rations travel along a (12" X
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ft Shakes.
Ifls Stainless Steel,
ft Handles All feeds.
Ills A Combination feeder & Bunk.
And, ft’s Low Cost
It’s A Stainless Steal.
CALEB M. WENGER
ultraviofeflight can be dangerous
to work with, so the researchers
don’t recommend a do-it-yourself
project.
The ozone is formed in an
opaque bottle which holds an
ozone bulb such as those used in
an ordinary clothes dryer. Air is
moved across the ozone bulb with
an aquarium pump, and the
generated ozone flows into a box
large enough to fit over several
plants.
They are working particularly
with potatoes and watermelons,
but ozone may affect almost any
flower, shrub or vegetable.
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shielded under the feeder. There’s
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VAJJ DALE
Box 337, Long Lake, Minnesota
Kenneth E. Wiley, STC vice
(Continued on Fage 13)