›› 1997, Vol. 40 ›› Issue (3): 261-264.

• RESEARCH PAPERS • Previous Articles     Next Articles

THE ROLE OF ECDYSTEROIDS ON DIAPAUSE OF HELICOVERPA ARMIGERA

Wang Fanghai Gong He   

  • Online:1997-08-20 Published:1997-08-20

Abstract: The ecdysteroids in the haemolymph of larvae and pupae from diapause andnon-diapause destined Helicoverpa armigera were measured by radioimmunoassay. It wasfound that the ecdysteroid titer in the prepupal stage of diapause-destined pupa was higherthan that of non-diapause-destined one. There was magnificent difference in titer of ecdysteroids between diapause and non-diapause pupae of H. armigera, the ecdysteroid titer in the diapause pupae was much lower. Pupal diapause in H. armigera could be immediatelyterminated with the injection of 20-hydroxyecdysterone.

Key words: Helicoverpa armigera, ecdysteroids, diapause