Title

Endocrine background of how 20-hydroxyecdysone agonist, RH 5849, influences diurnal pattern of pupation in Spodoptera littoralis

Abstract

Under laboratory conditions (L16:D8, 24 °C, r.h. 80%), applying of an ecdysone agonist, RH 5849, (1,2-dibenzoyl-1-tert-butylhydrazine) onto final instar larvae of Spodoptera littoralis (Boisd.), Noctuidae, Lepidoptera, delayed or advanced the time of pupation depending on the time of treatment. This response was dose-dependent. In addition, non-lethal doses of RH 5849, ranging from 0.05 to 10 μg/larva were used. Following treatment of S. littoralis larvae with 5 μg RH 5849 the endogenous ecdysteroid level was increased or decreased depending on the time of application. Based on the results presented, we suggest that potential users of non-steroidal ecdysone agonists should consider the proper circadian timing of application in the field.

Document Type

Article

DOI

https://doi.org/10.1046/j.1570-7458.1998.00329.x

Keywords

Circadian rhythmicity, Ecdysteroids, Pesticides, Pupation, RH-5849, Spodoptera littoralis

Publication Date

1-1-1998

Journal Title

Entomologia Experimentalis et Applicata

Link to Full Text

Share

COinS