INHERITED STERILITY AND POSTEMBRYONIC SURVIVAL OF TWO GENERATIONS OF TOBACCO BUDWORMS, HELIOTHIS VIRESCEHS (LEPIDOPTERA: NOCTUIDAE), FROM PARTIALLY STERILE MALES

Abstract

Male Heliothis virescens (F.) were irradiated with 7.5, 15.0, or 22.5 krad of 7-rays and crossed with untreated females. Then fertility of these treated males (PJ and of their descendants was studied for two generations. In addition, the postembryonic survival of the Fx and F2 generations was studied. Fertility (percentage egg hatch) of P1 males was greater than that of Ft males or Fj females. There was more postembryonic survival in the F1 than in the F2 generation. When the Px males received 22.5 krad, few F2 larvae hatched, and none survived. When Pt males received 15.0 krad, the fertility of F1 males and females was less than 5, and 10%, respectively, and less than 20% of the F2 larvae survived; however, sterility factors were nearly eliminated by the third generation. When P1 males received 7.5 or 15.0 krad, the average fertility of F2 males was greater than that of F1 or P1 males but less than that of untreated controls, though fertility of some F2 males was normal. The lower the dose received by P1 males, the greater was the frequency of F2 males with normal fertility.

SURVIVAL AND REPRODUCTIVE CAPACITY OF THE TOBACCO BUDWORM,HELIOTHIS VIRESCENS(LEPIDOPTERA: NOCTUIDAE), IRRADIATED AS DIAPAUSING AND YOUNG NONDIAPAUSING PUPAE

“…Budworms not in diapause irradiated with 7.5 krad as young male pupae appeared more nearly sterile than the insects irradiated with the same dose as adults (Proshold and Bartell 1972b), but progeny from males irradiated as pupae appeared more fertile than progeny from irradiated adults. Much of the sterility of males irradiated as pupae in the present test was caused by lack of egg fertilization, but approximately 78% of the embryonated eggs (late embryonation) hatched when males received 7.5 krad.…”

Inherited Sterility in Insects

“…Sitotroga cerealella (Olivier) Angoumois grain moth Cogburn et al 1966 Lymantriidae Lymantria dispar (L.) gypsy moth Mastro et al 1989Proshold et al 1993Proshold 1995Maksimovic 1972Mastro et al 1989Mastro 1993Strom et al 1996 Teia anartoides Walker painted apple moth Suckling et al 2002Wee et al 2005Suckling et al 2002 Helicoverpa zea (Boddie) corn earworm bollworm tomato fruitworm Carpenter et al 1987cCarpenter and Gross 1989Carpenter 1991Carpenter and Wiseman 1992aHamm and Carpenter 1997North and Snow 1978Carpenter et al 1987a, 1987b, 1989Carpenter and Gross 1993Mannion et al 1994 Heliothis virescens (F.) tobacco budworm Proshold and Bartell 1970, 1972a, 1972bGuerra and Garcia 1976North and Snow 1978 Spodoptera exigua (Hübner) beet armyworm Debolt 1973Carpenter et al 1996 Spodoptera frugiperda (J. E. Smith) fall armyworm Carpenter et al 1983, 1986, 1997Carpenter and Young 1991Arthur et al 1993Hamm and Carpenter 1997Carpenter et al 1985 Carpenter and Wiseman 1992b Plodia interpunctella (Hübner) Indian meal moth Cogburn et al 1966Ashrafi et al 1972Ashrafi and Roppel 1973Brower 1976,...…”

INHERITED PARTIAL STERILITY AND CHROMOSOMAL REARRANGEMENTS IN SUCCEEDING GENERATIONS AFTER IRRADIATION OF ADOXOPHYES ORANA (LEPIDOPTERA, TORTRICIDAE) WITH SUBSTERILIZING DOSES OF X‐RAYS AND FAST NEUTRONS

“…Irradiation of females had no effect on sex ratio. This difference can be explained by assuming that recessive lethals are induced on the X chromosomes of the homogametic males which are expressed in the heterogametic F1 female zygotes (Proshold & Bartell, 1970).…”