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..-..,,9eptember, 1923 





TRUCK-CROP INSECT INVESTIGATIONS — 
J. E. Graf, Entomologist Acting in Charge 
D. C. Parman, Investigations of Insects Affecting the Health of Animals, 
in charge of the Bureau station at Uvalde, Tex., stopped over in Birmingham, 
Ala., September 20 and 21, to make a survey of the ox warble in that section, 
and was an interested visitor of the Mexican Bean Beetle Laboratory. 
L. L. English, junior entomologist, engaged since March, 1921, on re- 
search investigations of the Mexican bean beetle, has resigned to accept a 
graduate assistantship at the Iowa Agricultural College, Ames, Iowa, where he 
will study for his doctor’s degree. Mr. English will make special investiga- 
tions of insecticides, especially stomach poisons, to which work he has devot- 
ed most of his time in the field for the last three seasons. 
E. G. &myth, special field agent in Mexico, is making frequent shipments 
of a tachinid parasite of the immature stages of the Mexican bean beetle to 
the Birmingham laboratory and to the Estancia, N. Mex., laboratory. Several 
hundred parasites have been received at each place. 
Through the cooperation of the Ohio Agricultural Experiment Station, 
A. E. Miller, in charge of the Chillicothe, Ohio, laboratory, has done consid- 
erable scouting in the south-central portion of the State, and has found the 
Mexican bean beetle in Ross, Jackson, and Gallia Counties, in addition to find- 
ing it in some of the other counties previously reported to the Bureau. Mr. 
Miller reports that the insect is quite numerous in certain localities, and in 
some instances has damaged foliage of beans to a considerable extent. 
Luther Brown, formerly assistant entomologist of the Georgia State Board 
of Entomology, and now connected with this Bureau, reports the spread of the 
Mexican bean beetle in Thomas County, Ga. In 1922 the insect covered only about 
16 square miles, while it is now known to cover at least 250 square miles. 
Practical field tests on over a hundred acres of beans at Newport, Tenn., 
have further demonstrated the success of the control of the Mexican bean 
beetle by spraying with magnesium arsenate. Good results have also been ob- 
tained by several truck growers about Chattanooga, Tenn., cooperating with 
the Mexican Bean Beetle Laboratory in the control of the Mexican bean beetle. 
J. &. Dudley, Jr., entomologist, in charge of pea aphis investigations, 
Madison, Wis., attended a preliminary pea aphis conference in Chicago during 
the middle of September, at which were present representatives of the pea 
canners and interested State entomologists. He reviewed his season’s work 
before this committee and made preliminary plans for next season’s work. 
W. D. Mecum, field assistant, who has been connected with the Madison, 
Wis., laboratory for the last five summer seasons, has resigned. 
