Competitive ability of sweet sorghum (Sorghum bicolor (L.) Moench) cultivars against hairy beggarticks (Bidens pilosa L.)


  • Leandro Galon Universidade Federal da Fronteira Sul
  • Carlos Orestes Santin UFFS
  • André Luiz Radünz Universidade Federal da Fronteira Sul
  • André Andres Embrapa Clima Temperado
  • Germani Concenço Embrapa Clima Temperado
  • Alexandre Ferreira Da Silva Embrapa Milho e Sorgo
  • Felipe Nonemacher Universidade Federal da Fronteira Sul
  • Gismael Francisco Perin Universidade Federal da Fronteira Sul
  • Ignácio Aspiazú Unimontes



additive series, substitute series, plant interaction, plant proportion, plant competition


Among the weeds that interfere with the growth and development of sweet sorghum, beggar ticks stands out, because it has a high competitive capacity for the available resources. This study aims to compare the competitive ability of sweet sorghum (Sorghum bicolor (L.) Moench) against hairy beggarticks (Bidens pilosa L.), as a function of cultivar and plant proportion. Experiments were conducted in a greenhouse in a completely randomized design with four replications and six treatments. Treatments were arranged in replacement series in the proportions of 100:0, 75:25, 50:50, 25:75, and 0:100% (sorghum:weed) equivalent to 20:0, 15:5, 10:10, 5:15 and 0:20 plants per pot with 8 dm3 capacity of sweet sorghum (cultivars ‘BRS 506’, ‘BRS 509’ or ‘BRS 511’) against hairy beggarticks. Fifty days after emergence, plant leaf area (LA), aboveground dry mass (DM), photosynthesis (A), and transpiration rates (E) were measured. Competitive ability was analyzed by using the graphical analysis method and building diagrams based on total and relative productivity. Competitiveness, clustering coefficient, and aggressiveness were also determined. Sorghum cultivars, in general, showed losses independently of the proportion of hairy beggarticks. Statistical analysis showed small differences in competitive ability among sorghum cultivars; ‘BRS 509’ was also demonstrated to be slightly more competitive than ‘BRS 506’ and ‘BRS 511’ against hairy beggarticks. This, however, is unlikely to provide a competitive advantage for ‘BRS 509’ in production fields, and hairy beggarticks should be efficiently controlled early in the crop cycle to avoid productivity losses, independently of the sorghum cultivar.


Download data is not yet available.

Author Biography

André Andres, Embrapa Clima Temperado




Agostinetto, D.; Fontana, L. C.; Vargas, L.; Markus, C.; Oliveira, E. (2013). Relative competitive ability of crabgrass in coexistence with flooded rice and soybean. Pesq. agropec. bras. 48(10): 1315-1322. doi: 10.1590/S0100-204X2013001000002

Aminpanah, H.; Javadi, M. (2011). Competitive ability of two rice cultivars (Oryza sativa L.) with barnyardgrass (Echinochloa crusgalli (L.) p. beauv.) in a replacement series study. Advances in Environmental Biology. 5 (9): 2669-2675.

Bastiani, M. O.; Lamego, F.P.; Agostinetto, D.; Langaro, A. C.; Silva, D. C. (2016). Relative competitiveness of soybean cultivars with barnyardgrass. Bragantia. 75(4): 435-445. doi: 10.1590/1678-4499.412

Bianchi, M. A.; Fleck, N. G.; Lamego, F. P. (2006). Proportion among soybean and competitor plants and the relations of mutual interference. Ciênc. Rural. 36 (5):1380-1387. doi: 10.1590/S0103-84782006000500006

Braz, G. B. P.; Machado, F. G.; Carmo, E. L.; Rocha, A. G. C.; Simon, G. A.; Ferreira, C. J. B. (2019). Agronomic performance and weed suppression in sorghum on dense sowing. Rev. Ciênc. Agrovet. 18 (2): 170-177. doi: 10.5965/223811711812019170

Cabral, P.H.R.; Jakelaitis, A.; Cardoso, I.S.; Araújo, V.T.; Pedrini, E.C.F. (2013). Weed interference on off-season sorghum crop. Pesqui. Agropecu. Trop. 43 (3): 308-314. doi: 10.1590/S1983-40632013000300008

Cousens, R. (1991). Aspects of the design and interpretation of competition (interference) experiments. Weed Technol. 5 (3): 664-673. doi: 10.1017/S0890037X00027524

Cousens, R.; O’Neill, M. (1993). Density dependence of replacement series experiments. Oikos. 6 (2): 347-352. doi: 10.2307/3544824

Cury, J. P.; Santos, J. B.; Silva, E. B.; Braga, R. R.; Carvalho, F. P.; Valadão, S. D.; Byrro, E. C. M. (2013). Nutritional efficiency of bean cultivars under competition with weeds. Planta Daninha. 31 (1): 79-88. doi: 10.1590/S0100-83582013000100009

EMBRAPA – Empresa Brasileira de Pesquisa Agropecuária. (2013). Sistema brasileiro de classificação de solos. 3a ed. Brasília: Embrapa Solos. 154p.

Fleck, N.G.; Agostinetto, D.; Galon, L.; Schaedler, C.E. (2008). Relative competitivity among flooded rice cultivars and a red rice biotype. Planta Daninha. 26 (1):101-111. doi: 10.1590/S0100-83582008000100011

Forte, C.T.; Basso, F.J.M.; Galon, L.; Agazzi, L.R.; Nonemacher, F.; Concenço, G. (2017). Competitive ability of transgenic soybean cultivars coexisting with weeds. Agrária. 12 (2):185-193. doi: 10.5039/agraria.v12i2a5444

Galon, L.; Santin, C.O.; Andres, A.; Basso, F.J.M.; Nonemacher, F.; Agazzi, L. R.; Silva, A. F.; Holz, C. M.; Fernandes, F. F. (2018). Competitive interaction between sweet sorghum with weeds. Planta Daninha. 36. e018173689. doi: 10.1590/s0100-83582018360100053

Galon, L.; Fernandes, F.F.; Andres, A.; Silva, A.F.; Forte, C.T. (2016). Selectivity and efficiency of herbicides in weed control on sweet sorghum. Pesqui. Agropecu. Trop. 46 (2):123-131. doi: 10.1590/1983-40632016v4639431

Galon, L.; Tironi, S.P.; Rocha, P.R.; Concenço, G.; Silva, A.F.; Vargas, L.; Ferreira, F.A. (2011). Competitive ability of barley cultivars against ryegrass. Planta Daninha. 29 (4): 771-781. doi: 10.1590/S0100-83582011000400007

Giancotti, P.R.F.; Nepomuceno, M.P.; Oliveira, T.S.; Costa, C.; Alves, P.L. (2019). Interspecific competition between sweet sorghum and weeds. Planta Daninha. 37. e019209325. doi: 10.1590/s0100-83582019370100094

Hoffman, M.L.; Buhler, D.D. (2002). Utilizing Sorghum as a functional model of crop weed competition. I. Establishing a competitive hierarchy. Weed Sci. 50 (4):466-472. doi: 10.1614/0043-1745(2002)050[0466:USAAFM]2.0.CO;2

Manabe, P.M.S.; Matos, C.C.; Ferreira, E.A.; Silva, A.A.; Sediyama, T.; Manabe, A.; Silva, A.F.; Rocha, P.R.R.; Galon, L. (2014). Physiological characteristics of beans in competition with weed. Biosci. J. 30 (6):1721-1728.

May, A. (2013). Cultivo de sorgo sacarino em áreas de reforma de canaviais. Circular Técnica, 186. Sete Lagoas, MG.

Page, E.R.; Tollenaar, M.; Lee, E.A.; Lukens, L.; Swanton, C.J. (2010). Shade avoidance: Na integral componente of cropweed competition. Weed Res. 50 (4):281-288. doi: 10.1111/j.1365-3180.2010.00781.x

Quintero-Pertúz, I.; Carbonó-Delahoz, E.; Jarma-Orozco, A. (2020). WEEDS Associated with banana crops in Magdalena department, Colombia. Planta Daninha. 38. doi: 10.1590/S0100-83582020380100015

Rigoli, R.P.; Agostinetto, D.; Schaedler, C.E.; Dal Magro, T.; Tironi, S. (2008). Relative Competitive ability of wheat (Triticum aestivum) intercropped with italian ryegrass (Lolium multiflorum) or wild radish (Raphanus raphanistrum). Planta Daninha. 26 (1):93-100. doi: 10.1590/S0100-83582008000100010

Rodrigues, A.; Costa, N.; Cardoso, L.; Campos, C.; Martins, D. (2010). Weed interference periods in Sorghum crop. Planta Daninha. 28 (1):23-31. doi: 10.1590/S0100-83582010000100003

ROLAS - Rede oficial de laboratórios de análise de solo e de tecido vegetal. (2016). Fertilization and liming manual for the states of Rio Grande do Sul and Santa Catarina. 10th ed. Porto Alegre: Sociedade Brasileira de Ciência do Solo. 376p.

Roush, M.L.; Radosevich, S. R.; Wagner, R. G.; Maxwell, B. D.; Petersen, T. D. (1989). Comparison of methods for measuring effects of density and proportion in plant competition experiments. Weed Sci. 37 (2): 268-275. doi: 10.1017/S0043174500071897

Rubin, R.S.; Langaro, A.C.; Mariani, F.; Agostinetto, D.; Berto, R.M. (2014). Relative competitive ability of irrigated rice with red rice susceptible or resistant to the herbicide imazapyr+ imazapic. Arq. Inst. Biol. 81(2): 173-179. doi: 10.1590/1808-1657001242012

Santos, J.; Cury, J. (2011). Black jack: a special weed in tropical soils. Planta Daninha. 29 (número especial): 1159-1171. doi: 10.1590/S0100-83582011000500024

Silva, A. F.; D’Antonino, L.; Ferreira, F. A.; Ferreira, L. R. (2014a). Manejo de plantas daninhas. In: Borém, A.; Pimentel, L.; Parella, R. editores. Sorgo: do plantio à colheita. pp. 188-206. Viçosa, MG: Universidade Federal de Viçosa.

Silva, C.; Silva, A.F.; Vale, W.G.; Galon, L.; Petter, F.A.; May, A.; Karam, D. (2014b). Weed interference in the sweet sorghum crop. Bragantia. 73 (4):438-445. doi: 10.1590/1678-4499.0119

Vilá, M.; Williamson, M.; Lonsdale, M. (2004). Competition experiments on alien weeds with crops: ¿Lessons for measuring plant invasion impact?. Biological Invasions. 6(1): 59-69. doi: 10.1023/B:BINV.0000010122.77024.8a

Wandscheer, A.; Rizzardi, M.; Reichert, M.; Gaviraghi, F. (2014). Competitive ability of maize in relation to sudangrass. Revista Brasileira de Milho e Sorgo. 13(2):129-141. doi: 10.18512/1980-6477/rbms.v13n2p129-141.




How to Cite

Galon, L., Santin, C. O., Radünz, A. L., Andres, A., Concenço, G., Da Silva, A. F., Nonemacher, F., Perin, G. F., & Aspiazú, I. (2022). Competitive ability of sweet sorghum (Sorghum bicolor (L.) Moench) cultivars against hairy beggarticks (Bidens pilosa L.). Revista De Ciencias Agrícolas, 39(1), 70–84.