Evaluation of varying concentrations of neem seed extracts in the control of cowpea scab (Sphaceloma SP.)
Paper Details
Evaluation of varying concentrations of neem seed extracts in the control of cowpea scab (Sphaceloma SP.)
Abstract
Cowpea scab caused by Sphaceloma sp. is the most destructive fungal disease of cowpea in northern guinea savannah ecological zone of Nigeria and indiscriminate use of synthetic fungicides in the control of the disease is posing serious threats to the environment and development of resistance strains. Field experiment was therefore, conducted in Bauchi-Nigeria to evaluate different concentrations of neem seed extracts as safe, cheap and environmentally friendly strategy in the management of cowpea scab. The treatments involved three neem seed formulations namely: Aqueous Neem Seed Extract (ANSE); Neem seed Oil (NSO); and Emulsifiable Neem Seed Oil (ENSO) each evaluated at three different concentrations (10, 15, 20% ANSE; 2, 3, 4l/ha NSO and 1:05, 1:10, 1:15v/v ENSO) along with standard fungicide mancozeb (2.5kg/ha) as check and unsprayed plots serving as control. The neem extracts were applied at weekly intervals and cowpea variety IT88D-867-11 which was highly susceptible to scab was used. Disease incidence and severity were assessed at weekly intervals. The results shows that neem seed extracts reduced the incidence by 8-26%and severity by 5-49%more than the unsprayed plants. Application of 1:05, 1:10v/v ENSO; 15, 20% ANSE was as effective as mancozeb in reducing severity of scab on cowpea stems, peduncles and pods. Cowpea yield loss reduction ranges from 19 – 75% on neem treated plants than the control. Application of 1:05, 1:10 ENSO and 15, 20% ANSE is therefore recommended in the management of cowpea scab infection and can be use as components of cowpea production package.
Allen DJ, Emechebe AM, Ndimande B. 1981. Identification of resistance in cowpea to disease of the savanna. Tropical Agriculture 58, 25-27.
Bationo A, Ntare BR, Tarawali SA, Tabo R. 2002. Soil fertility management and cowpea production on the semi-arid tropics. p 299-316. In: Fatokun, C.A., Tarawali S.A., Singh B.B., Kormawa P.M. and Tamo M. (eds.). Challenges and opportunities for enhancing sustainable cowpea production. Proceedings of the world cowpea conference III held at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, 4-8 September, 2000. IITA Ibadan, Nigeria. p 433.
Dawakiji AY, Gurama AU, Adebitan SA, Haruna SG, Tijjani A. 2016. Screen house evaluation of different concentrations and application methods of neem seed extracts on bacterial wilt of pepper (Ralstonia solanacearum E.F. Smith). Biological and Environmental Sciences Journal for the Tropics 13(2), 60-65.
Emechebe AM. 1980. Scab disease of cowpea (Vignaunguiculata) caused by Sphaceloma a species of the fungus. Annals of Applied Biology 96, 11-16.
Emechebe AM, Lagoke STO. 2002. Recent advances in research on cowpea diseases, 94-123. In: Fatokun, C.A., Tarawali S.A., Singh B.B., Kormawa P.M. and Tamo M. (eds.). Challenges and opportunities for enhancing sustainable cowpea production. Proceedings of the world cowpea conference III held at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, 4-8 September, 2000. IITA Ibadan, Nigeria, p 433.
Food and Agricultural Organization (FAO). 1993. Pests and diseases of cowpea. Plant protection bulletin 41(2), 73-85.
FAOSTAT. 2015. Food and Agricultural Organization Statistics Pocketbook. Rome
Locke JC. 1990. Activity of extracted neem oil against fungal plant pathogens. p 132-136. In: Locke J.C. and Lawson R.H. (eds.). Neem’s potential in pest management programmes. Proceedings of the USDA neem workshop.
Mortimore MJ, Singh BB, Harris F, Blade SF. 1997. Cowpea in tradinal cropping systems. p 99-113. In: Singh B.B., Mohan Raj D.R., Dashiell K.E. and Jackai L.E.N. (eds.). Advances in Cowpea Research. Co-publication if IITA and Japan International Research for Agricultural Science (JIRCAS). IITA Ibadan, Nigeria.
Mungo CM, Emechebe AM, Cardwell KF. 1995. Assessment of crop loss in cowpea (Vignaunguiculata (L.)Walp.)caused by Sphaceloma sp., causal agent of scab disease. Crop Protection 14(3), 199-203.
Mungo CM, Emechebe AM, Florini DA. 1998. Isolation of Sphaceloma sp. From cowpea plant parts using eight media. Crop Protection 17(4), 341-343.
Olufolaji OO, Singh BB. 2002. Advances in cowpea cropping system research.Pp 267-277. In: Fatokun, C.A., Tarawali S.A., Singh B.B., Kormawa P.M. and Tamo M. (eds.). Challenges and opportunities for enhancing sustainable cowpea production. Proceedings of the world cowpea conference III held at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, 4-8 September, 2000. IITA Ibadan, Nigeria, p 433.
Saxena RC. 1990. Neem as a source of natural insecticides – an update. p 1-24. In: Chari, M.S. and Ramaprasad G. (eds.). Botanical Pesticides in Integrated Pest Management. Proceedings of National Symposium on Botical Pesticides in Integrated Pest Management, Rajahmundry, India. p 477.
Tijjani A, Adebitan SA, Gurama AU, Aliyu M, Haruna SG, Mohammad GU, Mu’ab I. 2014. In vitro and In vivo efficacy of some plant extracts for the control of tomato fruit rot caused by Aspergillus flavus. International Journal of Scientific and Research Publication 4(4), 1-5. www.ijsrp.org
Stoll G. 1998. Natural crop protection in the tropics. Josef Margraf publishers, Germany, p 188.
Gurama Umar Abubakar (2018), Evaluation of varying concentrations of neem seed extracts in the control of cowpea scab (Sphaceloma SP.); IJB, V13, N6, December, P146-154
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