TY  - JOUR
T1  - Insecticidal Potential of Indigenous Plant Powders Against Beetle, <i>Callosobruchus maculatus</i>
(F.) (Coleoptera: Chrysomelidae) in Stored Cowpea
AU - Musa, A.K. AU - Uddin, R.O. 
JO  - Research Journal of Agronomy
VL  - 11
IS  - 1
SP  - 1
EP  - 5
PY  - 2017
DA  - 2001/08/19
SN  - 1815-9354
DO  - rjagr.2017.1.5
UR  - https://makhillpublications.co/view-article.php?doi=rjagr.2017.1.5
KW  - Biopesticides
KW  -Callosobruchus maculates
KW  -emergence
KW  -fecundity
KW  -grain damage
AB  - Powders of bitter leaf, cashew leaf, orange peel
and pawpaw leaf were tested at 2.5, 5.0 and 7.5% (w/w)
for their insecticidal actions against bean beetle,
Callosobruchus maculatus (F.) (Coleoptera:
Chrysomelidae) in the laboratory. Results showed that the
ovicidal and adulticidal actions of the plant powders
depended on dosages and exposure time. Mortality of
16.28 and 18.75% were observed in bitter leaf powder
applied at 7.5% (w/w) dosage within 24 and 48 h post
infestation (HPI), respectively. In grains treated with 7.5%
orange peel powder, 12.50 and 16.28% mortality were
observed with in 24 and 48 HPI, respectively. Each of
bitter leaf and orange peel powders was significantly
different (p<0.05) in causing adult mortality at highest
dosage compared with the control. No mortality was
observed in the control within 48 HPI. Oviposition was
inhibited in the highest dosage of the plant powders but
the percentage oviposition in the lower dosages was
three-fold lower than the control. The plant powders also
significantly reduced progeny emergence and grain
damaged by the beetle. No progeny emergence was
observed in grains treated with bitter leaf powder at
27 days post infestation. Cashew and pawpaw leaf
powders caused grain damage of 46.3-54.7 and
44.7-60.7% within three months of storage, respectively.
There was decrease in insecticidal effects of the plant
powders as indicated: bitter leaf>orange peel>ashew
leaf>pawpaw leaf. It is recommended that incorporating
these plant powders in pest management of stored
products will guarantee user safety, confer ease of
application, reduce environmental pollution and suppress
insect infestation under small scale storage.
ER  -