Effect of different doses of post-emergence-applied iodosulfuron on weed control and grain yield of malt barley (Hordeum distichum L.), under Mediterranean conditions
More details
Hide details
Institute of Mediterranean Agricultural and Environmental Sciences (ICAAM), University of Évora, Apartado 94, 7006-554, Évora, Portugal
José Calado Barros
Institute of Mediterranean Agricultural and Environmental Sciences (ICAAM), University of Évora, Apartado 94, 7006-554, Évora, Portugal
Submission date: 2015-10-01
Acceptance date: 2016-01-19
Journal of Plant Protection Research 2016;56(1):15–20
A study was carried out over a two year period (2009/2010 and 2012/2013) on an experimental farm in the Alentejo region (Beja), in southern Portugal where rainfed malt barley (Hordeum distichum L.) is sown at the end of autumn or beginning of winter (No- vember–December). The aim of this experiment was to study the efficiency of the herbicide iodosulfuron-methyl-sodium to control post-emergence broadleaved weeds in this cereal crop. The malt barley crop was established using no-till farming. This technology provides the necessary machine bearing capacity of the soil to assure the post-emergence application of herbicides at two different weed development stages. The herbicide iodosulfuron-methyl-sodium was applied at three doses (5.0, 7.5, and 10.0 g a. i. · ha–1) and at two different broadleaved weed development stages (3 to 4 and 6 to 7 pairs of leaves), that also corresponded to two different crop development stages (beginning of tillering and complete tillering). The results indicated that early herbicide application timing provided a significantly higher efficiency for all the applied herbicide doses, but this better weed control was not reflected in a higher crop grain yield. The lack of a higher crop grain yield was probably due to a crop phytotoxicity of the herbicide, when used at an early application timing.
The authors have declared that no conflict of interests exist.
Barros J.F.C., Basch G., Carvalho M. 2007. Effect of reduced doses of a post-emergence herbicide to control grass and broad-leaved weeds in no-till wheat under Mediterranean conditions. Crop Protection 26 (10): 1538–1545.
Barros J.F.C., Basch G., Freixial R., Carvalho M. 2009. Effect of reduced doses of mesosulfuron + iodosulfuron to control weeds in no-till wheat under Mediterranean conditions. Spanish Journal of Agricultural Research 7 (4): 905–912.
Boström U., Fogelfors H. 2002. Response of weeds and crop yield to herbicide dose decision-support guidelines. Weed Science 50 (2): 186–195.
Calado J.M.G., Basch G., Carvalho M. 2008. Aparecimento de plantas espontâneas com e sem perturbação do solo em condições Mediterrânicas. [Appearance of spontaneous plants from disturbed and undisturbed soil under Mediterranean conditions]. Revista de Ciências Agrárias 31 (2): 68–78. (in Portuguese).
Calado J.M.G., Basch G., Carvalho M. 2010. Weed management in no-till winter wheat (Triticum aestivum L.). Crop Protection 29 (1): 1–6.
Chauhan B.S., Singh R.G., Gulshan M. 2012. Ecology and management of weeds under conservation agriculture: A review. Crop Protection 38: 57–65.
Domaradzki K. 2003. Weed control in spring cereals by lower doses of herbicides. Journal of Plant Protection Research 43 (3): 247–254.
Férnandez-Quintanilla C., Barroso J., Recasens J., Sans X., Torner C., Sánchez Del Arco M.J. 1998. Demography of Lolium rigidum in winter barley crops: analysis of recruitment, survival and reproduction. Weed Research 40: 281–291.
Heap I. 2014. Herbicide resistant weeds. p. 281–301. In: “Integrated Pest Management” (P. David, P. Rajinder, eds.). Springer Netherlands, Corvallis OR, USA, 470 pp.
Jin Z.L., Zhang F., Ahmed Z.I., Rasheed M., Naeem M.S., Ye Q.F., Zhou W.J. 2010. Differential morphological and physiological responses of two oilseed Brassica species to a new herbicide ZJ0273 used in rapeseed fields. Pesticide Biochemistry and Physiology 98 (1): 1–8.
Kaczmarek S., Matysiak K., Adamczewski K. 2013. Cereal mixtures – an effective weed management tool. Journal Plant Protection Research 53 (4): 364–374.
Kaczmarek S., Matysiak K. 2015. Application of reduced doses of chlorsulfuron in semi-dwarf and full-height cultivars of winter triticale. Journal Plant Protection Research 55 (1): 8–15.
Kieloch R., Kucharsky M. 2012. Weed species response to two formulations of iodosulfuron methyl sodium and amido-sulfuron mixture applied at various environmental conditions. Polish Journal of Agronomy 8: 15–19.
Kudsk P. 2002. Optimising herbicide performance. p. 323–344. In: “Weed Management Handbook” (R.E.L. Naylor, ed.). 9th ed. Blackwell Publishing, Oxford, UK, 423 pp.
Kudsk P. 2008. Optimizing herbicide dose: a straightforward approach to reduce the risk of side effects of herbicides. The Environmentalist 28 (1): 49–55.
Malecka S., Bremanis G. 2006. Effectivity of reduced doses of herbicides to weed constitution of spring barley. Agronomy Research 4 (Special issue): 287–292.
Manalil S., Busi R., Renton M., Powles S.B. 2011. Rapid evolution of herbicide resistance by low herbicide dosages. Weed Science 59 (2): 210–217.
Medd R.W., Van de Ven R., Pickering D.I., Nordblom T.L. 2001. Determination of environment-specific dose response relationships for clodinafop-propargyl on Avena spp. Weed Research 41 (4): 351–368.
O`Donovan J.T., de St. Remy A., O`Sullivan P.A., Dew D.A., Sharma K.A. 1985. Influence of the relative time of emergence of wild oat (Avena fatua) on yield loss of barley (Hordeum vulgare) and wheat (Triticum aestivum). Weed Science 33 (4): 498–503.
Rahman A., James T.K., Mellsop J., Grbavac N. 2000. Effect of cultivation methods on seed distribution and seedling emergence. New Zealand Plant Protection 53: 28–33.
Streit B., Rieger S.B., Stamp P., Richner W. 2002. The effect of tillage intensity and time of herbicide application on weed communities and populations in maize in central Europe. Agriculture Ecosystems and Environment 92 (2–3): 211–224.
Vargas L., Roman E.S. 2005. Seletividade e eficiência de herbicidas em cereais de Inverno. [Selectivity and efficiency of herbicides in winter cereals]. Revista Brasileira de Herbicidas 3: 1–10. (in Portuguese).
Young F.L., Thorne M.E. 2004. Weed-species dynamics and management in no-till and reduced-till fallow cropping systems for the semi-arid agricultural region of the Pacific Northwest, USA. Crop Protection 23 (11): 1097–1110.
Zadoks J.C., Chang T.T., Konzak C.F. 1974. A decimal code for the growth stages of cereals. Weed Research 14 (6): 415–421.
Zand E., Baghestani M.A., AghaAlikhani M., Soufizadeh S., Khayami M.M., PourAzar R., Sabeti P., Jamali M., Bagherani N., Forouzesh S. 2010. Chemical control of weeds in wheat (Triticum aestivum L.) in Iran. Crop Protection 29 (11): 1223–1231.
Zhang J., Weaver S.E., Hamill A.S. 2000. Risks and reliability of using herbicides at below-labeled doses. Weed Technology 14 (1): 106–115.