xt71rn30423b https://exploreuk.uky.edu/dips/xt71rn30423b/data/mets.xml   Kentucky Agricultural Experiment Station. 1968 journals 174 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.174 text Progress report (Kentucky Agricultural Experiment Station) n.174 1968 2014 true xt71rn30423b section xt71rn30423b RESULTS Qi` THE
I KENTUCKY SORGO PERFORMANCE TEST
1967
By J. F. Shane
. Progress Report 174
February 1968
UNIVERSITY OF KENTUCKY
AGRICULTURAL EXPERIMENT STATION
Department of Agronomy
Lexington

 RESULTS OF THE KENTUCKY SORGO _
PERFORMANCE TEST - 1967
J. F. Shane
The objective of the Kentucky Sorgo Performance `
Test is to provide sorgo sirup producers with an esti- » .
mate of the relative performance of sorgo varieties.
Varieties in the test include those being grown in the
Southeastern Region of the United States and several of
the more promising experimental lines developed by the
U. S, Department of Agriculture at Meridian, Miss. The
1967 test included eight varieties grown in a randomized
block design of five replications.
Stalk samples of all varieties tested in the South-
eastern Region are sent to Meridian, Miss., or to Cairo,
Ga., for milling, juice analysis and sirup processing.
The sugar content of the juice and the amount that can
be extracted are two important characteristics of sorgo
varieties. The percentage of total soluble solids in the
juice, most of which are sugar, is determined by using a _
sugar hydrometer. Juice extraction at Meridian and Cairo
is considerably higher than that obtained by small mills.
Sirup of high quality should reach a finishing
_ temperature of 108OC (226OF) at usual altitudes in Ken-
tucky. A standard finishing temperature of 110OC (230OF) A
is used in processing sirup at Meridian. Difficulty in
producing an acceptable sirup might be encountered if this
temperature cannot be reached. The sirup is taken off
when the foam begins to roll and the temperature is more
or less static. Raising the temperature higher would tend
to scorch the sirup and produce a darker color.
Varieties in the test were heavily infected with mosaic,
a virus disease similar to the maize dwarf mosaic that
has been reported in corn. Williams, Sugar Drip and three
of the experimental lines exhibited considerable stunting,
probably associated with the disease. Symptoms of the
disease were found in all varieties tested. ·
In addition to the varieties in the Kentucky Sorgo
Performance Test, 36 experimental strains were evaluated
for mosaic as well as other agronomic characteristics.
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 One hundred eighty-five plant introductions, selections or
experimental strains were evaluated at Quicksand and
Frankfort for resistance to mosaic.
Entries were classified by plots on the basis of the
percentage of the plants exhibiting mosaic and the severity
of stunting. The entries ranged from 4 to 100 percent
plants infected and in severity of infection from no stunting
to very severe stunting.
Data for the 1967 Sorgo Performance Test are i  4
presented in the table on the preceding page. Differences .
of less than the figure given as the L.S.D. are not
significant.
2M—2-68