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VOL. 8, ISSUE 9 (2023)
Screening and synergistic action of medicinal plant powders against cowpea weevils Callosobruchus maculatus as adulticidal and fecundity and fertility inhibitor
Authors
Veena P Swami, Nootan Singh
Abstract
In India agriculture is the main stay in rural population representing
80% of the country and depends on it for their livelihood. In all over the
world formers incur losses of stored products due to insect and pests damage. Chickpea
is cultivated throughout the world and is placed third in the importance list
of the food legumes but suffer heavy qualitative and quantitative losses from the
attack of cowpea weevils, Callosobruchus species. In the present paper,
the evaluations were aimed to generating natural product treatments suitable
for post-harvest grain protection in the control of the cowpea weevils, Callosobruchus
maculatus attacking pulses in storage condition. Seven medicinal plant
powders viz. Chrysanthemum
cinerariiaefolium (CC), Cymbopogon nardus (CN), Cymbopogon
flexuosus (CF), Eucalyptus hybrid (EH), Eucalyptus citriodora
(EC), Pelargonium graveolens (PG), Rabdosia melisoides (RM) and
their combinations were evaluated for adulticidal activity as contact and
fumigant toxicities and fecundity and fertility inhibition against C.
maculatus to find out value added suitable grain protectants. CF powder was
highly toxic with LC50 values of 18.0 g/100 g and 12.3 g/litre in
contact and fumigant toxicity assays, respectively. CN, CF and PG gave complete
inhibition of egg laying at maximum concentration of 5g/100 g food. Combination
of EC + EH in equal ratio also provided 100% inhibition of egg laying. Powders
of CN, CF, PG and combinations of EC + EH, EC + RM, EH + RM in 1:1 ratio and EC
+ RM + PG in 1:1:1 ratio provide complete fertility inhibition in terms of F1
progeny production at the concentration of 2.5 g/100 g food and above. The
findings indicate the use of these plant materials as stored grain protectant
with added advantage of their medicinal value.
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Pages:48-53
How to cite this article:
Veena P Swami, Nootan Singh "Screening and synergistic action of medicinal plant powders against cowpea weevils <i>Callosobruchus</i> <i>maculatus</i> as adulticidal and fecundity and fertility inhibitor". International Journal of Entomology Research, Vol 8, Issue 9, 2023, Pages 48-53
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