Person: Kanampiu, F.
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Kanampiu
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F.
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Kanampiu, F.
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0000-0002-2480-6813 14 results
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- Identification of new maize inbred lines with resistance to Striga hermonthica (Del.) Benth(Tarbiat Modares University, 2012) Karaya, H.; Kiarie, N.; Mugo, S.N.; Kanampiu, F.; Ariga, E.S.; Nderitu, J.
Publication - Evaluation of fungal isolates as possible biocontrol agents against Striga hermonthica(Tarbiat Modares University, 2014) Kagot, V.; Okoth, S.; Kanampiu, F.; Mageto, E.
Publication - Combining ability of maize (Zea mays) inbred lines resistant to Striga hermonthica (Del.) Benth evaluated under artificial Striga infestation(Academic Journals, 2014) Karaya, H.; Njoroge, K.; Mugo, S.N.; Ariga, E.S.; Kanampiu, F.; Nderitu, J.
Publication - Performance of elite maize genotypes under selected sustainable intensification options in Kenya(Elsevier, 2020) Rusinamhodzi, L.; Makumbi, D.; Njeru, J.M.; Kanampiu, F.
Publication - Pre-harvest management is a critical practice for minimizing aflatoxin contamination of maize(Elsevier, 2019) Mahuku, G.; Nzioki, H.; Mutegi, C.; Kanampiu, F.; Narrod, C.; Makumbi, D.Maize, the main dietary staple in Kenya, is one of the crops most susceptible to contamination by aflatoxin. To understand sources of aflatoxin contamination for home grown maize, we collected 789 maize samples from smallholder farmers’ fields in Eastern and South Western, two regions in Kenya representing high and low aflatoxin risk areas, respectively, and determined aflatoxin B1 (AFB1) using ELISA with specific polyclonal antibodies. AFB1 was detected in 274 of the 416 samples from Eastern Kenya at levels between 0.01 and 9091.8 μg kg−1 (mean 67.8 μg kg−1). In South Western, AFB1 was detected in 233 of the 373 samples at levels between 0.98 and 722.2 μg kg−1 (mean 22.3 μg kg−1). Of the samples containing AFB1, 153 (55.8%) from Eastern and 102 (43.8%) from South Western exceeded the maximum allowable limit of AFB1 (5 μg kg−1) in maize for human consumption in Kenya. The probable daily intake (PDI) of AFB1 in Eastern Kenya ranged from 0.07 to 60612 ng kg−1 bw day−1 (mean 451.8 ng kg−1 bw day−1), while for South Western, PDI ranged from 6.53 to 4814.7 ng kg−1 bw day−1 (mean 148.4 ng kg−1 bw day−1). The average PDI for both regions exceeded the estimated provisional maximum tolerable daily intake of AFB1, which is a health concern for the population in these regions. These results revealed significant levels of preharvest aflatoxin contamination of maize in both regions. Prevention of preharvest infection of maize by toxigenic A. flavus strains should be a critical focal point to prevent aflatoxin contamination and exposure.
Publication - Assessment of management options on striga infestation and maize grain yield in Kenya(Weed Science Society of America, 2018) Kanampiu, F.; Makumbi, D.; Mageto, E.; Omanya, G.; Waruingi, S.; Musyoka, P.; Ransom, J.K.The parasitic purple witchweed [Striga hermonthica (Del.) Benth.] is a serious constraint to maize production in sub-Saharan Africa, especially in poor soils. Various Striga spp. control measures have been developed, but these have not been assessed in an integrated system. This study was conducted to evaluate a set of promising technologies for S. hermonthica management in western Kenya. We evaluated three maize genotypes either intercropped with peanut (Arachis hypogaea L.), soybean [Glycine max (L.) Merr.], or silverleaf desmodium [Desmodium uncinatum (Jacq.) DC] or as a sole crop at two locations under artificial S. hermonthica infestation and at three locations under natural S. hermonthica infestation between 2011 and 2013. Combined ANOVA showed significant (P<0.05) cropping system and cropping system by environment interactions for most traits measured. Grain yield was highest for maize grown in soybean rotation (3,672 kg ha-1) under artificial infestation and in D. uncinatum and peanut cropping systems (3,203 kg ha-1 and 3,193 kg ha-1) under natural infestation. Grain yield was highest for the Striga spp.-resistant hybrid under both methods of infestation. A lower number of emerged S. hermonthica plants per square meter were recorded at 10 and 12 wk after planting on maize grown under D. uncinatum in the artificial S. hermonthica infestation. A combination of herbicide-resistant maize varieties intercropped with legumes was a more effective method for S. hermonthica control than individual-component technologies. Herbicide-resistant and Striga spp.-resistant maize integrated with legumes would help reduce the Striga spp. seedbank in the soil. Farmers should be encouraged to adopt an integrated approach to control Striga spp. for better maize yields.
Publication - Herbicide resistant maize seed production and handling(CIMMYT, 2017) Makumbi, D.; Craufurd, P.; Kanampiu, F.The objective of this manual is to provide supplementary guidelines to seed companies during maintenance of parental inbred lines, seed production, handling and storage of herbicide resistant maize varieties. This manual should be used as a companion to the Maize Hybrid Seed Production Manual by MacRobert et al. (2014), published by the International Maize and Wheat Improvement Center (CIMMYT). The manual is available at http://repository.cimmyt.org/xmlui/handle/10883/4026?localeattribute=en. The main hybrid seed production manual contains detailed information on hybrid composition, seed classes, planning seed production requirements, pre-basic, basic, and certified seed production, field management of hybrid seed production, and seed crop budget. Seed companies are strongly advised to consult the manual for detailed information on managing maize hybrid seed production.
Publication - Crop-livestock interactions in smallholder farming systems and their implications for the adoption of Conservation Agriculture in Kenya(KALRO, 2015) Jaleta, M.; Odendo, M.; Ouma, J.O.; Kassie, M.; Kanampiu, F.This study was conducted as part of the project titled: ‘Enhancing Total Farm Productivity in Smallholder Conservation Agriculture-Based Systems in Eastern Africa’. Its purpose is to inform agronomists and other project partners on the existing crop and livestock production setups in the project intervention sites and to help determine to what extent the interaction between crop and livestock subsystems could potentially facilitate or hinder the adoption of conservation agricultural practices. A number of institutions and individuals contributed in various ways in the production of this baseline information and deserve acknowledgement. The authors would thus like to acknowledge EU-IFAD for funding the project, the Kenyan Agricultural and Livestock Research Organization (KARLO)-Embu and Kakamega Centers for facilitating the overall implementation of the study, which involved household and community surveys on which this report is based. The authors also acknowledge the contributions of respondent farmers in providing the necessary data gathered during the survey process, Ministry of Agriculture staff for logistic support and the enumerators for their commitment in data collection.
Publication - Agronomic performance and genotype X environment interaction of herbicide-resistant maize varieties in eastern Africa(Crop Science Society of America (CSSA), 2015) Makumbi, D.; Diallo, A.O.; Kanampiu, F.; Mugo, S.N.; Karaya, H.Striga hermonthica (Del.) Benth. and Striga asiatica (L.) Kuntze severely affect maize (Zea mays L.) production in sub-Saharan Africa. A single Striga plant produces a large number of seeds that form a bank of viable but dormant seed in the soil until they get a chemical signal from suitable maize host roots. Imidazolinone-resistant (IR) open-pollinated maize varieties (OP Vs) developed for Striga control were tested in diverse environments in four countries of eastern Africa in 2004. The objective of the study was to assess the agronomic performance of IR maize and genotype environment interactions (GE) for grain yield (GY) and the number of emerged Striga plants across 17 environments under Strigainfested and Striga-free conditions. In the combined analysis of variance across Striga-infested and Striga-free locations, mean squares for genotypes and GE were significant for most measured traits. The best IR maize variety (STR-VE-216) outyielded the Striga-tolerant and commercial genotypes by 113 and 89%, respectively, under Striga-infested conditions. IR OP Vs supported significantly fewer emerged Striga plants relative to the check varieties. Under Striga-free conditions, IR OP Vs showed GY advantage over commercial varieties. Under Striga-infested conditions genotypic variance ( 2 G ) was larger than genotype location variance ( ´ 2 G L ) for GY and number of emerged Striga plants at 12 wk after planting. The genetic correlations among locations under Striga-infested conditions were high (0.990), suggesting little GE between most environments used. Cluster analysis of genotypes under Striga-infested locations revealed two major groups that separated the IR OP Vs from the check varieties. The outstanding performance of selected IR OP Vs indicates that their use for Striga control would reduce the Striga seed bank while benefiting farmers with high GY
Publication - Maize yield response to crop rotation, farmyard manure and inorganic fertilizer application in Western Ethiopia(Academic Journals, 2013) Abebe Zerihun; Tolera, A.; Tusa, D.; Kanampiu, F.Continuous cropping with inorganic inputs has limitations in terms of maintaining long-term soil fertility. However, crop rotation integrated with fertilizer application is one of the cheapest alternative methods for sustainable crop production. In recognition of this fact, the experiment was conducted at Bako in western Ethiopia with the objective of identifying the best precursor crops and optimum integration of farm yard manure and inorganic fertilizer in a maize based rotation sequence. Two separate trials with different precursor crops were combined with three rates of organic manure and three rates of inorganic fertilizer NP2O5. The experimental design was 3×3×3 factorial arrangement in randomized complete block design in three replications. Inclusion of precursor crops markedly increased maize yield as compared to mono crops. The highest grain yield was obtained when haricot beans and Niger seed were the precursor crops. Application of 12 t ha-1 FYM after precursor crops resulted in grain yield of 9.3 t ha-1 and a marginal rate of return 225%. However, continuous incorporation of manure after precursor crops did not significantly (P>0.05) increase the yield. Application of 89/-35 kg ha-1 NP2O5 after legume maize rotation gave a grain yield and the highest marginal rate of return (236%). Haricot bean, Niger seed followed by application of either 12 t ha-1FYM or 89-35NP2O5 kg ha-1 is a better option for sustainable maize production than continuous mono cropping. As conclusion, haricot bean, Niger seed and Soybean can be used as precursor crops with use of either 12 t ha-1 of FYM or 89/35 kg ha-1NP2O5.
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