Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
 
Articles by M. Semon
Total Records ( 3 ) for M. Semon
  D. Montcho , K. Futakuchi , C. Agbangla , M. Semon , I. Dieng and M. Sie
  Oryza glaberrima is often classified into two ecological groups: upland and floating types. To assess the phenotypic variability of O. glaberrima across hydrological conditions, 217 accessions and 5 checks (Oryza sativa) were cultivated using toposequence. The trial was conducted at the experimental field of the International Institute of Tropical Agriculture in Ibadan during the wet seasons in 2009 and 2010. An Alpha Lattice design with three replications was used. Phenotypic data including vegetative vigor, plant height and tillers number at maturity, days to 50% heading and crop duration were recorded. The results indicated high variability among all O. glaberrima tested across ecologies for plant height, tiller ability and crop duration. This variability was confirmed by low genetic correlation coefficients, which demonstrated the significance of genotype by environment interaction. Oryza glaberrima accessions tested showed best vegetative vigor from upland to lowland. In 2009, 77.5 and 82.2% of the accessions were tall in hydromorphic and lowland, respectively while they represented 87.5 and 84.8%, respectively in 2010. Tillers number was intermediate from upland to lowland in both years. Result in 2009 indicated that 54.5% in upland, 70.9% in hydromorphic and 45.3% in lowland of O. glaberrima were intermediate tillering. The second season showed 63.2% in upland, 79.1% in hydromorphic and 82.1% in lowland. High percentage of O. glaberrima accessions was observed as late and very late maturing in 2009, 89.9% in upland and 91.4% in lowland. This study support efforts to breed for phenological plasticity in any rice growing environment.
  T.A. Agunbiade , F.E. Nwilene , A. Onasanya , M. Semon , A. Togola , M. Tamo and O.O. Falola
  Upland rice is mostly at risk from soil insect pests, including termites which cause significant yield losses. Studies were conducted at Kasua-Mangani, Kaduna State, Northcentral Nigeria, to evaluate the resistance status of 18 upland NERICA rice varieties to termite attack. The percent plant attacked by termites on the 18 NERICA varieties at 60 and 90 Days after Sowing (DAS) was between 2.47 to 12.45% and 3.82 to 20.89%, respectively. There was no significant difference in the response of NERICA rice varieties to termite attack at 60 and 90 DAS. The resistance status of NERICA rice varieties to termite attack was classified into 4 groups as follows: Moderately Resistant (MR), Moderately Susceptible with recessive resistance (MSr), Moderately Susceptible (MS) and Highly Susceptible (HS) according to cluster analysis. Of the 18 NERICA rice varieties studied, only NERICA 5, 14 and 18 were classified as MR and could be recommended as the most adapted rice varieties in termite prone areas of Northcentral Nigeria.
  F. E. Nwilene , A. Onasanya , A. Togola , O. Oyetunji , M. Semon , M. Tamo , E.O. Bright and S. Ofodile
  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 separatella Ragonot 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.
 
 
 
Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility