STUDIES ON THE EFFICACY OF SOME RHIZOME POWDERS IN PROTECTING STORED MUNG BEAN Phaseolus radiatus AGAINST PULSE BEETLE Callosobruchus chinensis (COLEOPTERA: BRUCHIDAE)

Abstract

The study was conducted to determine the efficacy of some
rhizome powders of Zingiber officinale var amarum and
Zingiber officinale var. officinale, Curcuma xanthorrhiza,
Alpinia galanga and Kaempferia galanga against
Callosobruchus chinensis in protecting mung bean Phaseolus
radiatus. The rhizome powders were admixed with the seed at
1% (w/w). The result showed all of rhizomes powder caused
adult mortality 80 to 90% at 5 days after treatment, but powder
of Alpinia galanga rhizome showed the fastest mortality
(43.75% at 1 day after treatment). The rhizome powder of,
Alpinia galanga and Kaempferia galanga provided good
protection for mung bean Phaseolus radiatus by reducing
number of egg laid, F1 adult emergence, seed damaged and seed
weight loss.