Genotypic response of sorghum cultivars to nitrogen fertilization in the control of Striga hermonthica

., F.A. Showemimo; Kimbeng, C. A.; Alabi, S. O.

doi:10.1016/s0261-2194(02)00024-8

Cited by 29 publications

(14 citation statements)

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“…Treatment combinations involving the resistant variety had among the lowest NES regardless of the other factors suggesting that host plant resistance can play a key role in Striga control provided that the trait is incorporated into the appropriate genetic background. This is in agreement with results of earlier researchers (Showemimo et al, 2002; Tesso et al, 2006). However, tillage appears to have significantly affected Striga infestation in susceptible cultivars with increased NES for tied‐ridge compared to flat bed planting.…”

Section: Discussionsupporting

confidence: 94%

Integrating Multiple Control Options Enhances Striga Management and Sorghum Yield on Heavily Infested Soils

Tesso

Ejeta

2011

Agronomy Journal

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Parasitic weed Striga (Striga hermonthica and Striga asiatica) poses the greatest threat to sorghum [Sorghum bicolor (L.) Moench] production in sub-Saharan Africa. Several control options have been attempted but none was most eff ective when deployed individually. In this study combination of three diff erent Striga control options namely resistant variety, tied-ridge tillage, N fertilizer and their controls (susceptible variety, fl at bed plating, and no N fertilizer) were evaluated at two Striga infested locations (Sirinka and Kobo) in Ethiopia in 2002 and 2003. Plots consisted of six 5-m long rows and the experiment was replicated four times. Grain yield, biomass, and 1000-kernel weight were determined. Striga emergence and vigor were recorded four times beginning 15 d aft er the fi rst Striga plant emerged. Grain yield was 121% higher with the package involving the resistant variety, tied-ridging, and N application compared with the package consisting of the controls. Th e use of the treatment combination involving resistant variety, tied-ridges, and N fertilizer resulted in yield increases of 11, 42, and 43%, respectively. Striga emergence and vigor were 4 and 63% for the resistant variety and 85 and 100% for the N fertilizer, respectively, compared with the controls. Number of emerged Striga was 152% higher in tie-ridged plots but Striga vigor was not aff ected. Resistant varieties should serve as central component in all integrated approaches for management of Striga in sorghum. * Statistically signifi cant at P ≤ 0.05. ** Statistically signifi cant at P ≤0.01.† Means in a column followed by the same letter are not signifi cantly different. ‡ Striga vigor: 1-weakest; 5-most vigorous. § ns, not signifi cant.

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Section: Discussionsupporting

confidence: 94%

Integrating Multiple Control Options Enhances Striga Management and Sorghum Yield on Heavily Infested Soils

Tesso

Ejeta

2011

Agronomy Journal

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“…Suppression of Striga emergence by nitrogen is consistent with several reports (Abusin, 2014;Adam, 2007;Ahonsi et al, 2002;Dawoud et al, 2007;Babiker, 2002;Hassan et al, 2009;Hamad Elneel, 2011;Showemimo et al, 2002) and may be attributed to a decrease in stimulant production (Cechin and Press, 1993;Hassan et al, 2009) and/or to direct toxicity to the parasite at early developmental stages (Parker and Riches, 1993). Nitrogen alone at 43.8 and 87.6 kg ha −1 reduced SDW by 78.1-98.6 per cent, plant height by 21.9-42.7 per cent, and increased sorghum growth as reflected by the increments in number of leaves and by 48.3-27.7 per cent and chlorophyll content by 44.3-57.9 per cent (Tables II-IV and VI).…”

Section: Discussionsupporting

confidence: 87%

Influence of triclopyr and nitrogen on management of Striga hermonthica on sorghum

Amhed

Abusin

Abdelgani

et al. 2015

World Journal of Science, Technology and Sustainable Development

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Purpose -The purpose of this paper is to study the effects of the herbicide triclopyr, nitrogen and their combinations on Striga incidence and sorghum growth. Design/methodology/approach -A greenhouse study was undertaken in season 2013. Sorghum cv Wad Ahmed, urea and triclopyr were employed. Treatments were arranged in a randomized complete design with four replicates. Findings -Nitrogen alone suppressed the parasite completely early in the season. Triclopyr at 0.3 and 0.4 kg a.e. ha −1 reduced Striga emergence by 92.9 and 58.3 per cent early and late in the season, respectively. Triclopyr at 0.3 kg a.e. ha −1 applied subsequent to nitrogen at 43.8 kg ha −1 effected poor control of the parasite. Unrestricted Striga parasitism reduced sorghum height and chlorophyll content by 50.38 and 16.62 per cent, respectively. Triclopyr, nitrogen and their combination improved sorghum growth considerably. Originality/value -The results suggest that the herbicide when applied subsequent to nitrogen afforded the most consistent performance and resulted in the highest suppression of the parasite.

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“…, 2002). A direct or indirect relationship between the presence of mineral nutrients and S. hermonthica infection has been suggested in previous studies (Cechin & Press, 1993; Gacheru & Rao, 2001; Showemimo et al. , 2002; Pageau et al.…”

Section: Discussionmentioning

confidence: 60%

Effect of diammonium phosphate application on strigolactone production and Striga hermonthica infection in three sorghum cultivars

Jamil

Mourik

Charnikhova³

et al. 2012

Weed Research

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Striga hermonthica infection poses a major constraint to sorghum production in sub-Saharan Africa, and low soil fertility aggravates the S. hermonthica problem. Under mineral nutrient deficiency, the sorghum host secretes large quantities of strigolactones, signalling molecules, into the rhizosphere. These induce S. hermonthica seed germination and subsequent infection of the host roots. In a combination of field and glasshouse experiments, we analysed the effect of microdose applied diammonium hydrogen phosphate (DAP) fertiliser on production of strigolactones, S. hermonthica infection and yield of three different African sorghum genotypes (CGM-19 ⁄ 1-1, Lina-3, DouaG). The sorghum cultivars all produced the strigolactones sorgomol and 5-deoxystrigol, albeit in different quantity and ratio. Without fertiliser, high S. hermonthica infection and emergence occurred under both glasshouse and field conditions. DAP application reduced secretion of sorgomol and 5deoxystrigol and reduced S. hermonthica germination (66-70%), emergence (49-73%) and dry biomass (90-96%) under glasshouse conditions. Under field conditions, DAP microdosing reduced S. hermonthica emergence by 40-84% and increased sorghum grain yield by 47-142%. Thus DAP application reduced secretion of strigolactones into the rhizosphere and S. hermonthica parasitism both under controlled and field conditions. Microdosing of DAP may prove to be an efficient and cost effective option to reduce S. hermonthica damage in sorghum in sub-Saharan Africa, particularly in combination with other control options, such as intercropping, use of organic fertiliser and hand pulling of S. hermonthica at flowering to achieve integrated S. hermonthica management.

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Genotypic response of sorghum cultivars to nitrogen fertilization in the control of Striga hermonthica

Cited by 29 publications

References 1 publication

Integrating Multiple Control Options Enhances Striga Management and Sorghum Yield on Heavily Infested Soils

Integrating Multiple Control Options Enhances Striga Management and Sorghum Yield on Heavily Infested Soils

Influence of triclopyr and nitrogen on management of Striga hermonthica on sorghum

Effect of diammonium phosphate application on strigolactone production and Striga hermonthica infection in three sorghum cultivars

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