Some Effects of Gamma-Radiation on the Tobacco Budworm, Heliothis Virescens (Fabricius).

Mortality of 0-to 1-day-old adult H. virescens caused by exposure to gamma radiation.................. 1. Dosage-response curve for percent egg hatch after gamma irradiation of 1-to 2-day-old eggs................ 47 2. Comparison of dosage-response curves from H. virescens larvae of different ages........................ 48 3. Comparison of adult emergence from irradiated 8to 10-day-old male and female H. virescens pupae . . .49 4. Dosage-response curves for percent of eggs hatched follovzing irradiation of 8-to 10-day-old H. virescens pupae..........