REFERENCES CITED 
Allen, Norman, W, S, Kinard, and Martin Jacobson, 
1962, Procedure used to recover a sex attractant 
for the male tobacco hornworm, Jour, Econ, Ent, 
55: 347-51, 
Ficht, G, A,, T., E, Hienton, andJ,M, Fore, 1940, The 
use of electric light traps in the control of the Euro- 
pean corn borer, Agr, Engin, 21: 3, 
Frost, S, W. 1952, Light traps for insect collection, 
survey and control, Pa, State Col, Bul, 550, 32 p, 
Gilmore, J, U, 1938, Observations on the hornworms 
attacking tobacco in Tennessee and Kentucky, Jour, 
Econ, Ent, 31: 706-12, 
and J, Milam, 1933, Tartar emeticas apoison 
for tobacco hornworm moths, a preliminary report, 
Jour, Econ, Ent, 26: 227-33, 
Lawson, F, R,, C, R, Gentry, and J. M, Stanley, 1963, 
Effect of light traps on hornworm populations in large 
areas, U.S, Dept, Agr, ARS 33-91, 18 p, 
Madden, A, H,, and F, S, Chamberlin, 1945, Biology 
of the tobacco hornworm in the southern cigar 
tobacco district, U.S, Dept. Agr. Tech, Bul, 
896, 51 p. 
Metcalf, Z, P, 1909, Insect enemies of tobacco, N,C, 
Dept, Agr. Spec, Bul., 70 p. 
Morgan, A, C,, and S, C, Lyon, 1928, Notes on amyl 
salicylate as an attractant to the tobacco hornworm 
moth, Jour, Econ, Ent, 21: 189-91, 
Noble, L, W., P. A, Glick, and W, J, Eitel, 1956, At- 
tempts to control certain cotton corn, and vegetable- 
corp insects with light traps, U,S, Dept. Agr, ARS 
33-28, 10 p. 
Pfrimmer, T, R., M. J. Lukefahr, and J, P, Hollings- 
worth, 1955, Experiments with light traps for con- 
trol of the pink bollworm, U,S, Dept, Agr, ARS 33-6, 
10 p, 
Purdue University, Departments of Entomology and 
Agricultural Engineering, Directions for the use of 
light traps to control hornworms on tobacco, June 
1961, 2 Pe [Mimeo, ] 
Rabb, R, L., H, H, Neunzig, and H, V., Marshall, Jr. 
1964, Effect of certain cultural practices on the 
abundance of tobacco hornworms, tobacco budworms, 
and corn earworms on tobacco after harvest, Jour, 
Econ, Ent, 57:791-92, 
Scott, L, B., and J, Milam, 1943, Iso-amyl salicylate 
as an attractant for hornworm moths, Jour, Econ, 
Ent, 36: 712-15, 
Stahl, C, F, 1954, Trapping hornworm moths, Jour, 
Econ, Ent, 47: 879-82, 
Stanley, J, M., and C, B, Dominick, 1958, Response of 
tobacco and tomato hornworm moths to blacklight, 
Jour, Econ, Ent, 51: 78-80, 
Stanley, J. M., F. R, Lawson, and C, R, Gentry, 1964, 
Area control of tobacco insects with blacklight 
radiation, Amer, Soc, Agr, Engin, Trans, 7: 125-27, 
Taylor, J. G., and H, O, Deay, 1950, Electric lamps 
and traps in corn borer control, Agr, Engin, 31: 503- 
5 and 532, 
ROLE OF AGRICULTURAL ENGINEERS IN PEST CONTROL 
Walter M, Carleton, Associate Director, Agricultural Engineering Research 
Division, and Ross D, Brazee, Leader, Pioneering Research Laboratory 
on Physics of Fine Particles, Agricultural Research Service, U.S, Department 
of Agriculture, Beltsville, Md., and Wooster, Ohio, respectively 
Research on the engineering phases of pest 
control cannot be effective without well-orga- 
nized cooperation with appropriate scientific 
disciplines and agencies (18), Agricultural and 
other engineers are cooperating with other 
disciplines whenever and wherever the situa- 
tion and resources permit. Therefore, letit be 
clear at the outset that, although this discus- 
sion will be primarily about the engineering 
phases of pest control, we are convinced of the 
need for a balanced team effort among the 
disciplines involved on any specific program, 
From a long-range viewpoint, research 
should be encouraged on the development of 
methods other than chemical for at least the 
more important pests, In this class would fall 
such methods as the uSe of natural biological 
202 
agents and attractants, resistant crop varieties, 
cultural methods, sterility procedures, phys- 
ical measures, sanitation and management of 
storage and processing plants, and insect- 
proof packaging for products subject to insect 
attack in storage, 
Chemical or mechanical weapons, or the 
cultural and sanitary measures that we have 
always used to mitigate insect damage, can 
often supplement the beneficial effects of 
natural insect diseases, parasites, and preda- 
tors to provide adequate economic control, A 
physical method could be used to reduce an 
insect population, so that extremely small 
amounts of an insecticide would be enough to 
"mop up" an infestation (23), It is apparent 
that the development of chemicals selective in 
