Nitrogen in combination with Desmodium intortum effectively suppress Striga asiatica in a sorghum-Desmodium intercropping system

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dc.contributor.author Reinhardt, Carl Frederick (Charlie)
dc.contributor.author Tesfamichael, Niguse
dc.date.accessioned 2012-04-24T07:54:17Z
dc.date.available 2012-04-24T07:54:17Z
dc.date.issued 2011
dc.description.abstract It is well known that the parasitic weed Striga asiatica (L.) Kuntze can be suppressed by Striga-tolerant sorghum (Sorghum bicolor L. Moench) cultivars, Desmodium intortum (Mill.) Urb. (greanleaf desmodium), and by fertilization with nitrogen. The study objective was the assessment of Striga control provided by integration of Desmodium density, timing of sorghum-Desmodium intercrop establishment, and nitrogen fertilization. Growth responses and yield of three sorghum cultivars were measured in three pot experiments. A soil naturally infested with Striga was used, and that part of the soil which served as uninfested control was chemically sterilised. Striga numbers and growth were affected significantly by sorghum cultivars, sorghum-Desmodium intercrop ratios, timing of the sorghum-Desmodium association, as well as by their interactions. Desmodium caused 100% suppression of Striga emergence when Desmodium was established in the 1:3 sorghum-Desmodium ratio at seeding of sorghum. Total control of Striga was also achieved with the 1:1 sorghum-Desmodium ratio when Desmodium was transplanted 30 days before sorghum seeding. However, these two treatments also caused significant reductions in sorghum yield. In contrast, 100% Striga control and a dramatic increase in sorghum yield were achieved with 100 kg N ha −1 in the 1:1 sorghum-Desmodium intercrop. Compatibility of sorghum and Desmodium was evident at the 1:1 sorghum-Desmodium intercrop established at sorghum seeding. Overall, the Ethiopian cultivars Meko and Abshir showed better agronomic performance and higher tolerance to Striga than the South African cultivar PAN 8564. It is recommended that the N× Desmodium× sorghum interaction be investigated under field conditions. en
dc.description.librarian nf2012 en
dc.description.sponsorship The Ethiopian Institute of Agricultural Research (EIAR), Addis Ababa, Ethiopia; Tigray Agricultural Research Institute (TARI), Mekelle, Tigray, Ethiopia. en_US
dc.description.uri http://www.jarts.info en_US
dc.identifier.citation Reinhardt, CF & Tesfamichael, N 2011, 'Nitrogen in combination with Desmodium intortum effectively suppress Striga asiatica in a sorghum-Desmodium intercropping system', Journal of Agriculture and Rural Development in the Tropics and Subtropics, vol. 112, no. 1, pp. 19-28. en
dc.identifier.issn 1612-9830
dc.identifier.uri http://hdl.handle.net/2263/18611
dc.language.iso en en_US
dc.publisher Kassel University Press en_US
dc.rights Kassel University Press en_US
dc.subject Striga asiatica en
dc.subject.lcsh Allelopathy en
dc.subject.lcsh Plant parasites -- Biological control en
dc.subject.lcsh Sorghum -- Diseases and pests -- Biological control en
dc.subject.lcsh Desmodium -- Diseases and pests -- Biological control en
dc.subject.lcsh Asiatic witchweed -- Biological control en
dc.subject.lcsh Intercropping en
dc.subject.lcsh Nitrogen fertilizers en
dc.title Nitrogen in combination with Desmodium intortum effectively suppress Striga asiatica in a sorghum-Desmodium intercropping system en
dc.type Article en


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