14 Regulatory Bulletin 115 sr
venting the loss of oaks should be on the alert for this trouble. Samples
of twigs from oaks showing symptoms of the disease should be sent to i
the National Oak Wilt Research Committee, P. O. Box 373, Memphis,
Tennessee.
Six twigs or branches about 6 to 8 inches long and 1/2 to 1 inch in p
diameter are best for laboratory examination. The twigs should be alive
or just recently dead but not completely dry. Do not send leaves, dead _
branches or decayed wood. The twigs should be tied in a bundle, wrap-
ped inpaper soas to prevent excessive drying but should not be wrapped eh
in wet moss or cotton. Labels should be attached in such a manner as
to couple the laboratory report with the tree from which the twigs were
taken.
t
One oak tree infected with oak wilt disease was found in Greenup
county, Kentucky, during the summer of 1951. The diseased tree was
destroyed, in approved manner, in order to prevent spread of trouble to _·
healthy trees.
JAPANESE BEETLE —p
Inspection andtrapping activities were continued during the summer
of 1953 in a special effort to find the exact limits of the beetle infested
areas in the counties of Jefferson, Greenup, Kenton and Campbell. The f
Jefferson county infested area was found to involve a few additional city
blocks east of Logan street between Broadway and Winter streets. In
Greenup county the beetles were found over the same area as the previ- A,
ous year with a few more beetles in the vacant lots in the town of Wor-
thington and less in the town of Russell. The Kent0n—Campbell county
area had showed little increase over 1952 and consisted primarily of iso-
lated spots involving a few city blocks each. '
Two DDT foliage sprays were applied to all infested areas in the a-
bove four counties. The sprays were applied at about ten day intervals, y
starting the last week in June and ending the third week in July. In ad- V
dition to the foliage sprays the infested areas in Jefferson, Kenton and
Campbell counties were treated with a surface-soil application of DDT.
It was not found practical to apply soil treatment to the area in Greenup, "
county.
WHITE-FRINGED BEETLE y
Survey type inspections were continued in Kentucky during the sum-
mer of 1953 to determine if white-fringed beetles had become establish- ’*°
ed. No beetles were found. This work was done by inspectors from the
Plant Pest Control Branch, Agricultural Research Service, U. S. D. A.
in cooperation with the State Entomologist. '
The three counties in Tennessee, known to have established infesta-
tions of white—fringed beetles, have received applications of insecticides