| dc.contributor.author | Kim, S.K. |
| dc.contributor.author | Adetimirin, V.O. |
| dc.date.accessioned | 2019-12-04T11:37:03Z |
| dc.date.available | 2019-12-04T11:37:03Z |
| dc.date.issued | 1997 |
| dc.identifier.citation | Kim, S.K. & Adetimirin, V.O. (1997). Responses of tolerant and susceptible maize varieties to timimg and rate of nitrogen under Striga hermonthica infestation. Agronomy Journal, 89, 38-44. |
| dc.identifier.issn | 0002-1962 |
| dc.identifier.uri | https://hdl.handle.net/20.500.12478/6418 |
| dc.description.abstract | urple witchweed [Striga hermonthica (Del.) Benth.], here called just striga, parasitizes cereal crops in the savanna zone of sub-Saharan Africa. The objectives of this study were to investigate the expressions of a tolerant and a susceptible cultivar of maize (Zea mays L.) to striga as affected by timing (0, 2, 4, and 6 wk after maize planting) and rates (60 and 120 kg N ha−1) of N application under striga infestation. The experiment was designed as a split-split plot with four replications. Timing of N application and N rates significantly affected striga emergence, host-plant damage scores, agronomic traits, and grain yield. Nitrogen rate x application time interaction was highly significant for striga emergence. Time of N application was more important than N rate in suppressing striga emergence and host-plant damage. Nitrogen application at 2 wk after planting and 120 kg N ha−1 gave the best result in terms of maize performance and reduction of striga emergence. Host-plant damage symptoms were more useful in differentiating response of host genotypes to striga than striga emergence values. The tolerant cultivar (hybrid 8322-13) produced 188% higher grain yield than the susceptible cultivar (hybrid 8338-1) across all treatments. Grain yield of the tolerant cultivar at 60 kg N ha−1 was 88% higher than that of the susceptible cultivar at 120 kg N ha−1. The tolerant cultivar produced an average 157% more ears at 60 kg N ha−1 and 51% more ears at 120 kg N ha−1 than the susceptible cultivar. Among all the factors studied, the most important component for striga management was genetic tolerance, the ability of a host plant to withstand the parasite. |
| dc.language.iso | en |
| dc.subject | Maize |
| dc.subject | Timing |
| dc.subject | Nitrogen |
| dc.subject | Striga Hermonthica |
| dc.title | Responses of tolerant and susceptible maize varieties to timimg and rate of nitrogen under Striga hermonthica infestation |
| dc.type | Journal Article |
| cg.contributor.affiliation | International Institute of Tropical Agriculture |
| cg.contributor.affiliation | University of Ibadan |
| cg.isijournal | ISI Journal |
| cg.authorship.types | CGIAR and developing country institute |
| cg.iitasubject | Nutrition |
| cg.iitasubject | Maize |
| cg.accessibilitystatus | Limited Access |
| cg.reviewstatus | Peer Review |
| local.dspaceid | 108163 |
