xt7cc24qm42x https://exploreuk.uky.edu/dips/xt7cc24qm42x/data/mets.xml   Kentucky Agricultural Experiment Station. 1953 journals 006 English Lexington : Agricultural Experiment Station, University of Kentucky Contact the Special Collections Research Center for information regarding rights and use of this collection. Kentucky Agricultural Experiment Station Progress report (Kentucky Agricultural Experiment Station) n.6 text Progress report (Kentucky Agricultural Experiment Station) n.6 1953 2014 true xt7cc24qm42x section xt7cc24qm42x Progress Report 6 J&¤¤6·1'Y. 1953
q CONTROL OF INSECTS IN STORED GRAIN
By J. D. Rodriguez and W. A. Price
Department of Entomology and Botany
CORN
Most Kentucky corn is stored as ear corn in slat cribs; this being the
case, fumigation of cribs is impossible without much added work in order
to make the cribs airtight. As a result, fumigation is not a common practice.
Within; the past two years a material that is non-toxic to warm blooded
animals has been available which the manufacturer claims, when dusted on
corn (snapped, ear, or grain) or on small grains, protection is obtained
against Angoumois grain moth (the chief pest of stored grains in Kentucky),
rice weevil, and other insect pests of stored grain. In order to test this
material ("Pyrenone Grain Protectant'5 a simple test was begun on November
12, 1951 in the Experiment Station Farm; three ten_-bushel cages were
made from wire fencing and the ear corn of one cage was treated, according
to directions, using 1 pound of grain protectant per 10 bushels of corn.
One cage was treated with half of this dosage while the other cage was not
treated. These cages were placed on one end of a crib about 8 x 12 x 25
feet and surrounded with several hundred bushels of the current year crop
» of ear corn.
On July 25,, 1952 an examination of ears in the cages revealed that a
big infestation had developed in all of the corn that remained in the untreated
portion of crib and in the cage containing the untreated corn while the corn
in the cage treated with the one pound level .of Pyrenone grain protectant
remained relatively free of Angoumois grain mothb On October 28, almost
a year after treatment, a thorough check was made of the condition of the
corn and it was found that both the treated and untreated corn were badly
infested with Angoumois grain moth; 70 percent of the kernels showed exit
holes.,
We must conclude that Pyrenone grain protectant does not protect ear
corn under such severe conditions as were present in this test. These were
severe conditions in that there was a huge volume of untreated corn in con-
tact with a small quantity of treated corn which already had a light infestation
of Angoumois grain moth obtained in the field. Too, the crib was not sprayed
4 Kentucky Agricultural Experiment Station
University of Kentucky
Lexington

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with DDT, as the Kentucky Station recommends, before the ear corn was
brought into the crib for storage, It is recognized that the materials aided ·
in holding the infestation inccheck through July, a period of about seven and , c
one ·half months. _
Recommendations on the use of this material cannot be made at this
time, It is hoped, however, that our tests now in progress in the testing
of this grain protectant will provide, when the tests are completed, the data
needed for a general statement on the subject.,
SMALL GRAIN
Since small grains are also infested with the insect common;to corn, ‘
several bushels of wheat and oats were treated with Pyrenone wheat protectant
on July 18, 1952, An examination of treated and untreated bags of these __
grains was made on October Z8, 1952, it was found that the infestation of
Angoumois grain moth had not proceeded beyond the original infestation level
of 1 percent while the untreated bags had 19 percent of the wheat kernels c ’
infested, There was a trace of Angoumois grain moth infestation developing
in the untreated oats but no trace in the treated oats, S