Journal of Entomological Science (2000) 35, 9-21

F.I. Proshold and J.E. Carpenter (2000)
Survival of Archytas marmoratus (Diptera : Tachinidae) in Helicoverpa zea and Spodoptera frugiperda (Lepidoptera : Noctuidae) at low temperatures and short days
Journal of Entomological Science 35 (1), 9-21
Abstract: Archytas marmoratus (Townsend) was reared on corn earworm, Helicoverpa zea (Boddie), or fall armyworm, Spodoptera frugiperda (J. E. Smith). Rearing chambers were programmed for a constant temperature of 15, 16, 19, 20, 22, 24, or 25°C and a photoperiod of 10:14 h (L:D) or 25°C and a photoperiod of 12:12 h (L:D). Development of parasitoids was faster when corn earworm larvae were parasitized than when fall armyworm larvae were parasitized. At 15°C parasitoid survival was poor on both hosts but at 16°C, more parasitoids eclosed on corn earworm than fall armyworm. Diapause induction in this strain of corn earworm was low. All pupae that eclosed after being in diapause produced an adult corn earworm. The data suggested that A. marmoratus is not influenced by diapause induction in its host but continues to develop above the threshold temperature for survival. This would restrict its overwintering as a larva or pupa to regions that have a continuous, nondiapausing host population. Thus, yearly establishment of A. marmoratus in more temperate areas would be required.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Helicoverpa zea
	Spodoptera frugiperda
Archytas marmoratus (parasitoid)	Helicoverpa zea		U.S.A. (SE)
Archytas marmoratus (parasitoid)	Spodoptera frugiperda