NIGERIAN JOURNAL OF SCIENCE AND ENVIRONMENT
Journal of the Faculties of Science and Agriculture, Delta State University, Abraka, Nigeria
ISSN: 1119-9008
DOI: 10.5987/UJ-NJSE
Email: njse@universityjournals.org
EVALUATION OF NATIVE SOAP (BLACK SOAP) FOR THE CONTROL OF MAJOR INSECT PESTS AND YIELD OF COWPEA (VIGNA UNGUICULATA (L.) WALP) IN ABRAKA, DELTA STATE
DOI: 10.5987/UJ-NJSE.16.045.1 | Article Number: 05A47A9 | Vol.11 (1) - September 2012
Author: Egho E.O
Keywords: Cowpea, insect pests, Abraka, southern Nigeria., native soap
The experiments were carried out during the early and late planting seasons on a public land adjacent to Campus 2, Delta State University, Abraka, Nigeria. The study evaluated native soap at 1, 2 and 3 percent concentrations for insecticidal property in the control of cowpea insect pests, namely cowpea aphid, Aphis craccivora Koch, legume bud thrips Megalurothrips sjostedti Tryb, legume pod borer, Maruca vitrata Fab. and pod sucking bugs. It also assessed influence of control on cowpea yield. The result showed that native soap at 3% concentrations significantly reduced (P<0.05) A. craccivora in the early season. M. sjostedti damage, thrip population, Maruca damage and pod sucking bug were generally low in this season. In the late season, colonies of A. craccivora were reduced at 1 and 2% concentrations. Similarly, all the tested concentrations checked flower thrips. Maruca damage was slightly suppressed at 1 and 2% native soap concentrations. The control plots had the highest population of sucking bugs suggesting that native soap had effect on bugs. Yields were 1,355.90kg ha-1, 1105.20kg ha-1 and 919.80kg ha-1 for 3%, 2% and 1% soap concentration respectively in the early season. Late season grain yield were 570.80kg ha-1, 510.10kg ha-1 and 358.90kg ha-1 for 3%, 1% and 2% respectively. Based on the high yields, particularly in the early season, the study suggests that native soap can be an effective insecticide against cowpea insect pests, and could form component of the integrated pest management. It was however, observed in the field that native soap caused delay and reduction in copious cowpea flowering. Eliminating this factor could be necessary to increase the efficacy of soap in the management of cowpea insect pests.
Afun, J.V.K., Jackai, L.E.N. and Hodgson,
C.J. (1991). Calendar and monitored
insecticide application for the control of
cowpea pests. Crop Protection 10: 363-
370.
Akinyemiju, O. A. and Olaifa, J. I. (1991).
Relative importance of weed and insect
pest control in cowpea production. Nigerian
Journal of Weed Science 4: 43-45
Alabi, O.Y., Odebiyi, J.A. and Jackai,
L.E.N. (2003). Field evaluation of cowpea
cultivars (Vigna unguiculata (L)
Walp.) for resistance to flower bud
thrips (Megalurothrips sjostedti Trybom)
Thysanoptera: Thripidae) International
Journal of Pest Management. 49
(4): 287-291
Booker, R.H. (1965). Pests of cowpeas and
their control in Northern Nigeria. Bulletin
of Entomological Research. 55: 663-
672.
Degri, M. M. and Hadi, H. M. (2000). Field
evaluation and economies of some insecticides
against the major insect pests
of cowpea (Vigna unguiculata (WALP)
in Bauchi, Nigeria. ESN Occasional
Publication 32:113-118.
Dina, S. O. (1982). Interactions between rate,
spray interval and number of applications
of the synthetic pyrethroid Decis in
Cowpea (Vigna unguiculata) pest control.
Journal of Agricultural Science 99:
471-478
Duke, J.A. (1981). Vigna unguiculata (L)
Walp. Spp unguiculata In: legumes of
world economic importance. Plenum
Press, New York, p. 303-305.
Ejiga, N.O. (1979). The efficiency of the indigenous
food grain marketing systems
in Nigeria, Savannah 8 (2): 70-83
FOS (1995). Annual abstract of statistics,
Federal Office of Statistics, Lagos, Nigeria.
IITA (1984). Annual Report for 1982. International
Institute of Tropical Agriculture,
Ibadan, Nigeria
IITA (1985). Annual report for 1984, International
Institute of Tropical Agriculture,
Ibadan, Nigeria.
IITA (2002). Improving and intensifying cereal-
legume systems in the moist and
dry savannas of the West and Central
Africa. Annual Report 2002. IITA,
Ibadan pp 23.
Iliyasu, A.S. (2004). Evaluation of efficacies
of some foliar applied botanicals on the
control of aphids, Aphis craccivora
Koch (Homoptera: Aphididae) on cowpea.
M.Sc. Thesis, Ahmadu Bello University,
Zaria (ABU), Nigeria.
Jackai, L.E.N. (1985). Cowpea Entomology
Research at IITA and its impact on food
production in the tropics. Nigeria Journal
of Entomology 6: 87-97
Jackai, L.E.N. (1983). Efficacy of insecticide
applications at different times of day
against the legume pod borer, Maruca
vitrata (Fab) (Lepidoptera: pyralidae) on
cowpea in Nigeria. Protection Ecology
5: 245-251.
Jackai, L.E.N. and Daoust, R.A. (1986). Insect
pests of cowpeas. Annual Review of
Entomology 31: 95 119.
Jackai, L.E.N. and Singh, S.R. (1986). New
foliar insecticides for the control of cowpea
pests. Proceedings of British Crop
Protection Conference-Pests diseases.
761-768
Jackai, L.E.N. and Singh, S.R. (1988).
Screening Techniques for Host Plant
Resistance to Insect Pests of cowpea.
Tropical Grain Legume Bulletin 35: 2-
18.
Litsinger, J.A., Quirino, C.B., Lumaban,
M.D. and Bandong, J.P. (1977). Grain
Legume Pest Complex of Three Phillipine
Rice-Based Cropping System. Cropping
Program, IRRI. Los Banos. Philippines,
39.
Matteson, P.C. (1982). The effect of intercropping
with cereals and minimal cypermethrin
application on insect pests of
cowpea and their natural enemies in Nigeria.
Tropical Pest Management 28:
372-380.
Okigbo, B.N. (1978). Grain legumes in the
agriculture of the tropics. In Pests of
Grain legumes Ecology and control
(Singh, S.R., Van Emden, H.E. and Taylor,
T.A. Eds.) Academic Press, New
York. p454
Omongo, C. A., Adipala, E., Ogenga
Latigo, M. W. and Kyamanywa, S.
(1997). Insecticide application to reduce
pest infestation and damage on cowpea
in Uganda. African Plant Protection 4
(2): 91-100
Rachie, K.O. (1985). Introduction. In: Cowpea
research, production and utilization
(Singh, S.R. and Rachie, K.O. eds).
Wiley, New York. P. Xxi- xxviii.
Remison, S.U. (1978e). Cowpea agronomy
works at National Cereals Research Institute.
Paper presented at the 1st National
meeting. On development of package.
Recommendations for legume crops
at N.C.R.I, Ibadan, 7-8 February.
Singh, S.R. and Allen, D.J. (1980). Pests,
diseases, resistance and protection in
cowpea. In Advances in legume Science.
(Summerfield, R.J. and Bunting,
A.H., eds.). Her Majesty's Stationery
office, London, 419-443.
Suh, J.B., Jackai, L.E.N. and Hammond,
W.N.O. (1986). Observations on pod
sucking bug populations on cowpea at
Mokwa, Nigeria. Tropical Grain legume
Bulletin 33: 17-19.