Zur Biologie des indischen Sojabohnen-Schädlings Plusia acuta Walker (Lep., Noctuidae)

Abstract

Plusia acuta, hitherto reported as a minor pest of soybeans, now has become its a regular and serious pest in Madhya Pradesh, India. During kharif season of 1979 it infested severely about 10 hectares of soybeans in Jabalpur, Madhya Pradesh, India. Research was, thus, carried out to work out its biology in the laboratory in 1979.

Single female moth laid 97.6 eggs in its life span on both the surface of leaves and some times on tender petiole and petiolets. The incubation, larval, prepupal and pupal periods lasted for about 4, 14, 1 and 7 days, respectively. Total life cycle completed in 24.8 days. Male and female moths lived for 5.6 and 4.8 days, respectively. The percentage emergence of adults was 73.8 in the laboratory. 26.3 percent larvae were found parasitized in fields.

Zusammenfassung

Es wird über — größtenteils im Labor durchgeführte —Untersuchungen zur Biologie der in Indien an Sojabohne schädlichen EulePlusia acuta Walker berichtet. Eizahl und Eiablageort, Stadien- und Gesamtentwicklung, Veruppungsform, Puppengewicht, Schlupfquote, Lebenszeit und Geschlechterverhältnis der Falter im Labor sowie Parasitierungsquote und Parasiternarten einer Freilandpopulation werden mitgeteilt.