Soil-dissipation kinetics of twelve herbicides used on a rain-fed barley crop in Spain

Díez, Cristina; Barrado, Enrique
June 2010
Analytical & Bioanalytical Chemistry;Jun2010, Vol. 397 Issue 4, p1617
Academic Journal
This study evaluated the dissipation kinetics under actual field conditions of twelve herbicides in a typical xerofluvent soil in Castilla y León (north central Spain) sustaining barley. The type of soil selected was that typically used in the Castilla y León region to cultivate barley under a rain-fed alternating crop–fallow rotation regimen. Treatments were conducted in spring as two replicates and the soil was sampled every day during the first week, once a week for the following few weeks and thereafter once every month. Soil samples were extracted with a suitable mixture of acetone, water and acetic acid (30:7.5:0.3) before their analysis by GC–MS (gas chromatography–mass spectrometry). Dissipation of the herbicides was well described by a biphasic kinetics pattern. The dissipation times DT50 and DT90 were in general lower than those reported in the literature, owing to a high initial dissipation rate because of volatilization and photolysis processes caused by high environmental temperatures. Herbicide degradation was also enhanced by their lack of sorption by this low colloid-content soil. However, the most persistent herbicides, triallate, flamprop, pendimethalin, terbutryn, and isoproturon, remained for 286 to 372 days in the soil, because low water and organic carbon content impaired microbial growth. In contrast, the phenoxy acid herbicides dissipated rapidly, with no detectable residues detected on harvesting the crop.


Related Articles

  • Good progress made in south. Abel, Charles // Farmers Weekly;2/14/2003, Vol. 138 Issue 7, p64 

    Reports on herbicide spraying progress in Hants, England. Condition of winter barley; Options for blackgrass control; Recommendation for dealing with resistant blackgrass.

  • Field Dissipation of Sulfentrazone and Pendimethalin in Colorado. Shaner, Dale L. // Weed Technology;Oct-Dec2012, Vol. 26 Issue 4, p633 

    Pendimethalin and sulfentrazone are applied PRE in sunflower to control many grasses and broadleaf weeds. These herbicides have quite different physicochemical properties. Pendimethalin has a high carbon-referenced sediment partition coefficient (1(17,200 L kg" ), with a low leaching potential,...

  • Bleaching herbicide effects on plastids of dark‐grown plants: lipid composition of etioplasts in amitrole and norflurazon‐treated barley leaves. Di Baccio, D.; Quartacci, M. F.; Vecchia, F. Dalla; La Rocca, N.; Rascio, N.; Navari-Izzo, Flavia // Journal of Experimental Botany;Sep2002, Vol. 53 Issue 376, p1857 

    The effects of the bleaching herbicides amitrole (125 µM) and norflurazon (100 µM) on etioplast lipids were studied in barley plants (Hordeum vulgare L. cv. Express) grown for 7 d either at 20°C or 30°C in darkness. Total lipid, glycolipid and phospholipid contents of control...

  • Fight resistance in barley too.  // Crops;2/12/2005, p34 

    This article presents information related to weed resistance methods adopted to prevent destruction of barley crop. Adopting a mixed approach is possible in barley thanks to several classes of actives with different modes of action. HGCA data illustrating the sensitivity of rhynchosporium...

  • Effect of Additives and Small Grain Herbicides on the Efficacy of AE F130060 03 plus AE F107892 in Barley. King, Steven R.; Hagood, Jr., Edward S. // Weed Technology;April/June2005, Vol. 19 Issue 2, p372 

    Experiments were conducted in the 2000 to 2001 and 2001 to 2002 growing seasons to evaluate the efficacy of AE F130060 03 plus AE F107892 with nonionic surfactant (NIS) or methylated seed oil (MSO) plus urea ammonium nitrate (UAN) applied in November (early postemergence, EP), January (middle...

  • Untitled. Jones, David // Farmers Weekly;11/22/2013, Vol. 159 Issue 46, p5 

    The article reports on the results of a survey by agrichemical and seeds group Syngenta about the spring barley growing plans of farmers in England. Topics discussed include switching to spring barley to control blackgrass, effect to profitability of switching to spring barley, spring barley...

  • α-tocopherol-Does Play a Significant Role on Affecting the Herbicidal Efficacy of Grasp for Controlling Weeds and Increasing Growth in Barley? El-Rokiek, K. G.; El-Shahawy, T. A.; Balbaa, L. K. // International Journal of Agricultural Research;2007, Vol. 2 Issue 4, p312 

    Two greenhouse experiments were conducted in this regard on barley cv. Giza 122 during the period of (2004–2006). a-tocopherol and grasp were used in different concentrations (50, 100, 150 and 250, 500, 1000 mg L-1, respectively), as a post-emergence application either alone or in...

  • IPU withdrawal is a headache for growers of winter barley. Impey, Louise // Farmers Weekly;7/6/2007, Vol. 146 Issue 27, Special Section p24 

    The article reports on the effect of IPU withdrawal on winter barley growers in Great Britain. Lee Bennett of CPB Twyford said that IPU gave growers flexibility with spray and timing and very good control of meadowgrass. According to him, the loss of the product will turn growers to use of...

  • Spring barley prospects rise. Impey, Louise; Abel, Charles // Farmers Weekly;12/3/2004, Vol. 141 Issue 23, p48 

    Presents information on the prospects for the profitability of spring barley in Great Britain in 2005. Comparison of the average gross margin of spring barley with winter wheat; Effect of blackgrass resistance to herbicides on control costs; Factors that affect spring barley sales and malt...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics