Eight-hundred and forty-eight tobacco (Protoparce sexta (Johan.)) and tomato (P. quinquemaculata (Haw.)) hornworm moths were irradiated individually with energy bands, nominally 33 Angstroms wide, centered at 3129, 3341, 3654, 4047, 4358, 4916, 5461, and 5780 A. Tests were made in a light-tight, air conditioned chamber. An analysis of variance was used to determine differences in responses to treatments. A significant difference in response to waveband treatments was found in each moth group. Generally, responses to the four shorter wavelengths were greater than to the four longer. When considering all moths or all trapped moths, best responses were to 3129 and 3341 Angstroms and second best were to 3654 and 4047 Angstroms. Reared moths were more responsive to treatments than trapped moths. Greatest response was obtained from the reared male tobacco hornworm moths. Tomato hornworm moths were less responsive to treatments than tobacco hornworm moths. The female tomato hornworm moths 1rJere numerically, least responsive. Numerically, more responses were elicited from first exposures than from those received later. / Master of Science

In this investigation a laboratory apparatus was designed and constructed suitable for testing various commercially avai1able electric lamps as attractors moths for moths of both tobacco hornworm (Protonaree sexta (Johan.)) and tomato hornworm (Protoparce quinquemaculata (Haw.)) species. / Master of Science

Eight-hundred-three moths were irradiated with 10-second exposures of radiation in bands 100 Angstroms wide at 200 A. intervals. The main range covered was 3150 to 4550 A. Four controlled temperatures between 60 and 80 F. were used. Observations of individual moth responses were combined to determine the most stimulating band, the effect of temperature, and effects of species, sex, time of testing, and moth origin. Within the wavelength range, a band centered at 3150 A. had the most reactions and one at 4350 A. the least. The total group of moths tested over these bands had a plot of reactions versus wavelength with no reversals of slope between maximum and minimum. No definite effects of temperature, sex, time of testing, or moth origin were found. The tomato hornworm moth was definitely the less active species and showed a greater difference between bands of maximum and minimum reactions. An additional test found no effect due to the relative intensity of radiation on different bands, which was not equalized in the main tests. Only teat groups which allowed for several hundred possible moth reactions at each treatment showed consistent trends. / Master of Science