Experiment Station Record, Volume 92, January-June, 1945 Page: 90
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90 EXPERIMENT STATION RECORD [Vol, 92
Pecan nut casebearer control, H. HINRICHS, G. A. BIEBERDORF, and F. B. CROSS.
(Okla. Expt. Sta. et al.). (Amer. Soc. Hort. Sci. Proc., 44 (1944), pp. 123-128,
illus. 2).--In a 2-yr. spray test against the pecan nut casebearer, two applications
containing 4 lb. of lead arsenate, 3 qt. of summer oil, and 1 pt. of nicotine sulfate to
100 gal. of water proved most effective. Sprays must be properly timed for best
results; when delayed a week or more they were not effective. A single spray of
6 lb. of lead arsenate and 3 qt. of summer oil to 100 gal. of water gave promising
results in 1943. Dormant spraying with dormant oils and Dinitro and summer
applications of fixed nicotines have shown possibilities but need further testing.
All the spray mixtures used increased production by decreasing the casebearer
population, but under severe infestation the most extensive and thorough methods
are necessary to gain control of this pest.
Insectos que atacan a los productos alimenticios almacenados [Insects attacking
stored food products], E. G. LINSLEY and E. MICHELBACHER. (Univ. Calif).
(Fitofilo, 2 (1943), No. 5, pp. 18-68, illus. 21).-This compendium on these pests
and their control is a translation of California Station Bulletin 676 (E. S. R., 89,
Studies on Tribolium confusum Duval.--III, Abnormalities produced in
Tribolium confusum Duval by exposure to acetic and hydrochloric acids, L. M.
ROTH (Ann. Ent. Soc. Amer., 37 (1944), No. 2, pp. 235-254, illus. 42).-When
various stages of the confused flour beetle were subjected to the vapors of acetic
acid the results were more or less similar to those obtained with vapors of the
odoriferous substance given off by the adults. In the present study, a detailed
analysis is presented of the types of abnormalities produced. The type of deformity
induced was found to be determined by the developmental stage at time of treatment,
and this type changed with a change in the developmental stage. Glacial
acetic acid and various concentrations of HC1 were also applied directly to different
stages of this insect, the results being essentially the same as those obtained by the
acetic acid vapors. In only one case was an accessory outgrowth induced and
never were any duplications or triplications obtained.
Protection of dried packaged foodstuffs from insect damage, E. G. LINSLEY.
(Univ. Calif.). (Jour. Econ. Ent., 37 (1944), No. 3, pp. 377-379).-No commercially
available glass- or metal-substitute packages are known to be proof against
all insect pests. The best commercial package thus far tested is a heavy fiberboard
carton dipped twice in thermoplastic wax; this could be improved by closer attention
to cutting and assembling the carton to provide tighter fitting seams and more
careful dipping for a smoother, more uniform, bubble-free wax coverage. Repellents
offer promise of increasing the usefulness of the various wax- and papercoated
packages; among the better materials thus far investigated are the dinitrocresol
compounds. Dehydrated foodstuffs, in spite of their low moisture content,
are subject to insect damage and infestation; they require essentially the same protection
afforded air- and sun-dried products.
Recirculation in atmospheric fumigation of commodities with nitriles, E. H.
GLASS. (Ohio State Univ. et al.). (Jour. Econ. Ent., 37 (1944), No. 3, pp. 388391,
illus. 3).-Laboratory and large-chamber fumigations with acrylonitrile-oarbon
tetrachloride and trichloroacetonitrile-acrylonitrile mixtures were made to study the
possible value of recirculation in atmospheric chambers. Several comparable dosagemortality
curves for the confused flour beetle, with and without circulation, demonstrated
that recirculation did not increase the effectiveness of fumigations in a 6-1.
chamber under the experimental conditions. In 1,1 further tests in a 740-cu. ft.
atmospheric chamber, recirculation also failed to increase the effectiveness of the
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U.S. Department of Agriculture. Agricultural Research Administration. Office of Experiment Stations. Experiment Station Record, Volume 92, January-June, 1945, book, 1947; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5064/m1/103/: accessed July 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.