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Ajala S.O.,National Cereals Research Institute
Journal of Food, Agriculture and Environment | Year: 2010

This study was conducted with the objective of predicting and comparing expected gains for two selection indices and to aid identification of a better index to improve maize populations for a target environment, in this case, small-farm conditions. Data from S2 lines from each of three populations evaluated at three locations in 1988 were subjected to (a) an index that uses economic weights and (b) rank summation index (RSI) that is both weight and parameter free. Responses to single trait selections were much higher than using an index. RSI was considered a better index because it was operationally more efficient and simpler. Selection through RSI will in addition to improving the aggregate trait in the desired direction, improve grain yield and will not increase height much.

Gana A.K.,National Cereals Research Institute
International Sugar Journal | Year: 2014

In field trials in 2008-09 at sugarcanethe National Cereals Research Institute (NCRI), Badeggi, Nigeria, impact of mulching with cover crops or intercropping sugarcane was assessed to elicitsugarcane alternative cultural ways of reducing the weeding frequency in cane fields managed by resource poor growers. Cane plots covered or mulched with sugarcane trash had a significantly lower weed cover score than other treatments. This resulted in better sugarcane growth and higher cane yield (t/ha) than the sugarcane intercropped with cover crops namely melon (local variety), macuna and cowpeas(Ife brown). The control, neither intercropped nor mulched, hadthe poorest weed control and lowest sugarcane yield.

Nwilene F.E.,Africa Rice Center | Onasanya A.,Africa Rice Center | Togola A.,Africa Rice Center | Oyetunji O.,Africa Rice Center | And 4 more authors.
Journal of Entomology | Year: 2011

Rice and maize intercrop is a common feature of traditional upland rice cultivation in Nigeria. Stemborer larvae cause significant yield loss in rice. The study aimed at identifying stemborer resistant status of upland NERICA rice varieties and evaluating the effectiveness of maize as a trap crop to protect upland NERICA rice varieties against stemborers. The resistance status of 7 NERICA rice and 2 other rice varieties to stemborer was evaluated in 2006 and 2007 under natural infestation maize and cassava intercropping systems in the humid forest zone of Nigeria. In 2006 study, NERICA1, NERICA2 and NERICA5 together with the resistant check LAC23 were classified as stemborer resistant (SBR) and NERICA3, NERICA4, NERICA6 and NERICA7 together with susceptible check OS6 were classified as stemborer susceptible (SBS). The SBR varieties (NERICA1 and NERICA2) from the 2006 study intercropped with maize and cassava in 2007 revealed the effectiveness of maize as a trap crop and cassava as a refuge for generalist predators against stemborer damage on upland rice. Maize appeared an effective trap crop for rice stemborers because there was a marked and significant reduction in the stemborer attack on rice in the NERICA rice/maize intercrops (GrB cluster) as compared to the NERICA rice monocrops (GrA cluster) and NERICA rice/cassava intercrops (GrA cluster). Maliarpha separatellaRagonot was the predominant stemborer species on rice followed by Sesamia calamistis Hampson. It was concluded that NERICA1 and NERICA2 could be recommended to farmers in stemborer prone areas and that maize was a suitable trap crop for managing rice stemborers. © 2011 Academic Journals Inc.

Mamza W.S.,National Cereals Research Institute | Zarafi A.B.,Ahmadu Bello University | Alabi O.,Ahmadu Bello University
Archives of Phytopathology and Plant Protection | Year: 2010

Six fungicides at three rates (1.5x, 1.0x and 0.5x mg a.i/ml) were evaluated on radial growth and and regrowth of mycelia of Fusarium pallidoroseum isolated from castor (Ricinus communis) in vitro. It was observed that the fungicides (Benomyl, Benomyl + Thiram, Mancozeb, Metalaxyl-m + Thiomethoxan + Difenconazol, Tricyclazole and Carbendazim + Mancozeb) at all the concentrations tested inhibited mycelial growth and regrowth of the fungus. Benomyl, Benomyl + Thiram and Tricyclazole completely inhibited mycelia growth of fungus at 1.5x, 1.0x and 0.5x mg a.i/ml. Metalaxyl- m + Thiomethoxan + Difenconazole, Carbendazim + Mancozeb partially inhibited radial growth and re-growth of mycelia only at 1.5x mg a.i/ml, not at 1.0x and 0.5x mg a.i/ml. The inhibitory effect of all the fungicides on mycelia growth and re-growth was greatest at 1.x5 mg a.i/ml. © 2010 Taylor & Francis.

Ismaila U.,National Cereals Research Institute | Gana A.S.,Minna Federal University Of Technology | Dogara D.,Agricultural Development Project Minna
African Journal of Agricultural Research | Year: 2010

Nigeria agriculture is characterized by small holdings, low capitalization and low yield per unit of land. Cereal crops are the major dietary energy supplier all over the world and particularly in Nigeria. In most part of Africa, cereals supplies about 80% of the energy requirements. Major cereals produced in Nigeria include rice, sorghum, maize, sugar cane and pear millet. They are the mostly grown in the savannah agro ecological zone of the country. Factors militating their level of productivity include climatic factors (rainfall, temperature and solar radiation), edaphic factors, migration, government policies, use of local varieties, predominance of weeds, pest and diseases and the scourge of HIV/AID. Solving Nigeria cereal problems is an indirect and powerful approach to alleviate poverty and improve the standard of living for Nigeria farmers. There is the need to have a systematic collaborative research to find solution to the problems posed. The government should be consistent in its agriculture policies such as provision of credit facilities, ban on importation of cereal crops and subsidizing agricultural inputs. © 2010 Academic Journals.

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