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The effect of Sitophilus zeamais (Mots) (Coleoptera: Curculionidae) on the quality and viability of stored maize in Nigeria

Published online by Cambridge University Press:  19 September 2011

S. N. Okiwelu ,
O. O. Adu  and
V. N. Okonkwo
S. N. Okiwelu
Affiliation:
Department of Zoology, University of Port Harcourt, P.M.B. 5323, Port Harcourt, Nigeria
O. O. Adu
Affiliation:
Nigerian Stored Products Research Institute, P.M.B. 5063, Port Harcourt, Nigeria
V. N. Okonkwo
Affiliation:
Department of Zoology, University of Port Harcourt, P.M.B. 5323, Port Harcourt, Nigeria
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Abstract

The effect of 10, 20, 30, 40, and 50 adult Sitophilus zeamais on the quality of 1 kg lots of white maize maintained at 25−30°C and 65−85% r.h. was observed. Per cent moisture, oil, Free Fatty Acid (FFA) content and germination were determined at 2-week intervals for 10 weeks.

Moisture content of infested maize ranged from 11.51 to 12.92%. There was a significant correlation between moisture content and degree of infestation (r = 0.88; P < 0.05; Y = 11.908 + 0.006 x). The range of oil content of infested maize was 4.83−5.75%. There was a significant correlation between oil content and degree of infestation (r = −0.097; P < 0.05; Y = 5.08 −0.0076 x). The free fatty acid (FFA) of infested maize was 5.82−6.86%. The heterogeneity at various infestation levels was significant (F = 81.38; d.f. = 5; P < 0.001). There was an increase in FFA, with increasing infestations, although the correlation was not significant.

The germination of maize, 10 days after planting, at various infestation levels was 43.0−97.5%. There was a decrease in germination, as level of infestation increased. The heterogeneity in germination at various infestation levels was significant (F = 19.21; d.f. = 5; P < 0.001). Possible reasons for the results obtained, are presented.

Résumé

L'effet de 10, 20, 30, 40, et 50 adultes de Sitophilus zeamais sur la qualité de 1 kg de maîs blac a été observé. Le pourcentage d'humidité, la teneurs en lipides, acides gras libres et le pourcentage de germination ont été déterminés à intervalles de deux semaines pendant 10 semaines.

Le pourcentage d'humidité de maîs infesté variait de 11,5 à 13,1. Il y avait une corrélation significative entre le pourcentage d'humidité et le degré d'infestation (r = 0,88; p < 0,05; Y = 11,908 + 0,006 x). La variation de teneur en huile du maîs infesté était de 4,4−5,5%. Il y avait une corrélation significative entre la teneur en huile et le degré d'infestation (r = 0,065; p < 0,05; Y = 5,08 − 0,0076 x). Le pourcentage en acides gras libres dans le maîs infesté était de 5,8−6,9%. L'hétérogénéité à divers niveau d'infestation était significative (F = 81,38; d.d.l. = 5; p < 0,001). Il y avait une augmentation dans le pourcentage d'acides gras libres lorsque l'infestation augments, bien que la corrélation ne soit pas significative.

Le pourcentage de germination du maïs dix jours après semis à divers niveau d'infestation était de 43−98%. Il y avait une diminution dans le pourcentage de germination lorsque le taux d'infestation augmente. L'hétérogénéité dans le pourcentage de germination à divers niveau d'infestation était significative (F = 19,21; d.d.l. = 5; p < 0,001). La signification de ces résultats est discutée.

Keywords

Sitophilus zeamaismoisture contentdegree of infestationheterogeneity in germinationSitophilus zeamisteneur en humiditédegré d'infestationhétérogénéité dans la germination.
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 8 , Issue 3 , June 1987 , pp. 379 - 384
Copyright
Copyright © ICIPE 1987

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References

Abbot, W. S. (1925) A method of computing the effectiveness of an insecticide. J. econ. Ent. 18, 265–267.CrossRefGoogle Scholar
Adams, J. M. (1977) The evaluation of losses in maize stored on a selection of small farms in Zambia, with particular reference to methodology. Trop. Stored Prod. Inf. 33, 19–24.Google Scholar
Adesuyi, S. A. and Shode, D. A. (1977) Assessment of losses in two varieties of maize (2–26 and NSI) stored in cribs in the humid tropics. Nig. J. Plant. Prot. 3, 98–100.Google Scholar
Agboola, S. D. (1980) The role of Nigerian Stored Products Research Institute in Nigeria's march towards self sufficiency in food. Nig. Stored Prod. Res. lnst. Occ. Ser. 1, 1–16.Google Scholar
Anonymous (1970) Official methods of analyses. Association of Official Analytical Chemists (AOAC). 11th edition. Washington D.C.Google Scholar
Bell, R. J. and Walters, F. L. (1982) Environmental factors influencing the development and rate of increase of Prostephanus truncatus Horn (Coleoptera: Bastrichidae) on Stored maize. J. Stored Prod. Res. 18, 131–142.CrossRefGoogle Scholar
Bronswijk van, J. E. M. H. and Sinha, R. N. (1971) Interrelations among physical biological, and chemical varieties in stored-grain ecosystems; a descriptive and multi-variate study. Ann. ent. Soc. Am. 64, 789–803.CrossRefGoogle Scholar
Cornes, M. A. (1973) A check list of the insects associated with stored products in Nigeria. Annual Rep. Nigerian Stored Products Research Institute 1973.Google Scholar
Cowley, R. J., Howard, D. C. and Smith, R. H. (1980) The effect of grain stability on damage caused by Prostephanus truncatus (Horn) and three other beetle pests of stored maize. J. Stored Prod. Res. 16, 75–78.CrossRefGoogle Scholar
Demianyk, C. J. and Sinha, R. N. (1981) Effect of pyralid moth infestation on fat acidity, seed germination and microflora of stored wheat. J. econ. Ent. 74, 526–531.CrossRefGoogle Scholar
Giles, P-H. (1965) A record of stored product insects associated with Northern Nigerian Food Stuffs. Institute for Agricultural Research-Ahmadu Bello University, Samaru-Zaria. Samaru Misc. Pub. No. 1.Google Scholar
Golob, P. (1981) A practical assessment of food losses sustained during storage by small holder farms in the Share State Valley Agricultural Development Project area of Malawi. 1978/79. Trop. Prod. lnst. Report G154.Google Scholar
Golob, P. and Hodges, R. (1982) Study of an outbreak of Prostephanus truncatus (Horn) in Tanzania. Trop. Prod, lnst. Report G164.Google Scholar
Hayward, L. A. W. (1955) Losses associated with groundnuts infested with Trogoderma granarium Everts. J. Sci. Food Agric. 6, 337–340.CrossRefGoogle Scholar
Hodges, R. J., Dunstan, W. R., Magazini, I. and Golob, R. (1983) An outbreak of Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae) in East Africa. Prot. Ecol. 5, 183–194.Google Scholar
Imura, O. and Sinha, R. N. (1984) Effect of infestation by Sitotroga cerealella (Lepidoptera: Gelechiidae) and Sitophilus oryzae (Coleoptera: Curculionidae) on the deterioration of bagged wheat. Environ. Ent. 13, 1471–1477.CrossRefGoogle Scholar
Irabagon, T. A. (1959) Rice Weevil damage to stored corn. J. econ. Ent. 52, 1130–1136.CrossRefGoogle Scholar
Ivbijaro, M. F., Osisanya, E. O. and Akinlade, E. E. (1979) The deterioration of commercial maize (Zea mays) by insects of fungi. J. Bioleterioration. 74–76.Google Scholar
Khare, B. P., Singh, K. N., Chaudhary, R. N., Sengar, C. S., Agrawal, R. K. and Rai, P. N. (1974) Insect infestation and quality deterioration of grain—1, Germination, odour and Palatability in wheat. Indian J. Int. 36, 194–199.Google Scholar
Lustig, K., White, N. D. G. and Sinha, R. N. (1977) Effect of Tribolium castaneum infestation on fat acidity, seed germination and microflora of stored wheat. Environ. Ent. 6, 827–832.CrossRefGoogle Scholar
MacMasters, M. M. (1969) Structure and composition of cereal grain with special reference to purity of food. In Grain Sanitation (Edited by Majumder, S. K. and Venugopal, J. S.). pp. 1–12. Academy of Pest Control Sciences, Mysore.Google Scholar
Nwankwo, F. I. and Nwogu, E. O. (1975) A survey of the qualities of yellow and white maize sold in Port Harcourt markets. Ann. Rep. Nigerian Stored Products Research Institute, pp. 83–86.Google Scholar
Singh, K., Agarwal, N. S. and Girish, G. K. (1975) Studies on the damage of Sitophilus oryzae Linn. (Coleoptera: Curculionidae) and its effewct on the germination of seeds of various high yielding varieties of wheat and maize. Indian J. Ent, 146–149.Google Scholar
Sinha, R. N. (1984) Effects of weevil (Coleoptera: Curculionidae) infestation on abiotic and biotic quality of stored wheat. J. Econ. Ent. 77, 1483–1488.CrossRefGoogle Scholar
Taylor, T. A. (1977) On the flight activity of Sitophilus zeamais (Mots) (Coleoptera: Curculionidae) and some other grain-infesting beetles in the field and store. J. Stored Prod. Res. 6, 295–306.CrossRefGoogle Scholar
Venkat Rao, S., Nuggehali, R. N., Pingale, S. V., Swaminathan, M. and Subramanyam, V. (1958) Effect of insect infestation on stored grain. III Studies on kaffir corn (Sorghum vulgare). J. Sci. Food. Agric. 9, 837–838.CrossRefGoogle Scholar
White, N. D. G., Henderson, L. P. and Sinha, R. N. (1979) Effects of infestations by three stored-product mites on fat acidity, seed germination and microflora of seed wheat. J. econ. Ent. 72, 763–766.CrossRefGoogle Scholar
Zeleny, L. (1954) Chemical, physical and nutritive changes during storage. In Storage of cereal grains and their products (Edited by Anderson, J. A. and Alcock, A. W.) pp. 46–76. A Assoc. Cereal Chem. St. Paul. Minn.Google Scholar