Document Type : Research Paper

Authors

1 M.Sc. Student of Weed science, Faculty of Agriculture and Natural Resources, Gonbad Kavous University, Gonbad Kavous, Iran

2 Assistant Professor, Department of Crop Protection, Faculty of Agriculture and Natural Resources, Gonbad Kavous University, Gonbad Kavous , Iran

3 Assistant Professor, Department of Crop Protection, Faculty of Agriculture and Natural Resources, Gonbad Kavous University, Gonbad Kavous, Iran

4 Associate Professor, Department of Crop Protection, Faculty of Agriculture and Natural Resources, Gonbad Kavous University, Gonbad Kavous , Iran

Abstract

Abstract
 
Background and Objectives
Nowadays, herbicides are crucial for modern agricultural systems. Yet, improper application of herbicides will have dangerous consequences. For example, there will be crop damage due to long lasting herbicide residue or herbicide drift on neighbor crops if applied on non-target species. The purpose of this experiment was to determine the sensitivity of wheat and barley to pendimethalin residue by using bioassay.
 
Materials and Methods
In order to evaluate soil residue of pendimethalin, experiments with completely randomized designs were carried out in the greenhouse at Faculty of Agricluture and Natural Resources of Gonbad Kavous University. In this experiments, different doses of pendimethalin (0, 1, 5, 10, 15, 20, 30, 40, 50, 75 and 100 % of recommended dose) were applied on wheat and barley in order to measure the dry weight of root and shoot of crops. The concentration of herbicides was made by dilution of stock solvent. Three/four-parameter log-logistic curves were used for fitness of the data.
 
Results
Results indicated that almost all data followed the three-parameter logarithm logistic curve. Results of separate fitness of data showed that the residue of pendimethalin always caused reduction of dry weight of the evaluated crops. Fifty percent reduction of shoot dry weight of wheat and barley was obtained from 400.5 and 623.05 g.a.i.ha-1 of pendimethalin and the ED50 values of root dry weight of wheat and barley were 65.88 and 269.66 g.a.i.ha-1 of pendimethalin, respectively.
 
Discussion
Generally, the results of simultaneously fitted data shows that wheat is always more sensitive to pendimethalin rather than barley. Based on results, even the very little portion of herbicides can cause damage to crops, thus, considering the sensitive crop in rotation is so important since this residue can stay active even in two-season crops and make crop injuries. The selection between 3 and 4 Logarithm logistic model was based on: 1. Lack of fit test significance 2. Significance of estimated parameters, especially the parameters and the way of distribution of data around the curve (graphical observation).

Keywords

Main Subjects

References
Barzoei, M., Izadi-Darbandi, E., Rashed Mohassel, M. H., Rastgoo, M. and Hassanzadeh Khaiat, M. H. (2012). Evaluation of sensitivity of some crops to trifluralin residue in soil. 5th Iranian Weed Congress, Karaj, Iran.
Barzoei, M., Izadi-Darbandi, E., Rashed Mohassel, M., Rastgoo, M. and Hassanzadeh, M. (2016). Evaluation of some pulses and other crops sensitivity to Metribuzin simulated soil residue. Journal of Plant Protection, 30(2), 177-180. [In Farsi]
Demczuk, A., Sacała, E. and Grzys, E. (2004). Changes in the activity of the acetyl lactate (ALS) under the effect of the herbicide Titus at different varieties of cucumber. Progress in Plant Protection, 44(1), 645-647.
Izadi Darbandi, E. and Akram, L. (2013). Investigate the effect of Pyridate, Bentazon and Imazethapyr herbicides on growth, nodulation and biological nitrogen fixation in chickpea (Cicer arietinum L.). Iranian Journal of Pulses Research, 3(1), 105-118. [In Farsi]
Izadi, E., Rashed Mohasel, M. H. and Zand, E. (2010). Evaluation of crops sensitivity to atrazine soil residual. Iranian Journal of Field Crops Research, 8(6), 995-1001. [In Farsi]
Mosavi, M. R. (2008). Weed control (principles and practices). Tehran: Gohar Press. [In Farsi]
Pestemer, W. and Zwerger, P. (1999). The application of a standardized bioassay to estimate the phytotoxic effects of frequently used herbicides on non-target plants. Human and Environmental Exposure to Xenobiotics, 763-770.
Ritz, C. and Streibig, J. C. (2005). Bioassay analysis using R. Journal of Statistical Software, 12(5), 1-22.
Sadowski, J. and Kucharski, M. (2004). The impact of agro-meteorological factors to download and phytotoxicity remains of the herbicides contained in the soil. Progress in Plant Protection, 44(1), 355-363.
Sadowski, J., Rola, H. and Kucharski, M. (2002). The use of bioassays to assess the level of herbicides residues in soil. Progress in Plant Protection, 42(1), 152-158.
Seefeldt, S. S., Jensen, J. E. and Furst, E. P. (1995). Log-logistic analysis of dose-response relationships. Weed Technology, 9(2), 218-227.
Sekutowski, T. and Sadowski, J. (2009). Phytotoxkittm microbiotest used in detecting herbicide residue in soil. Environment Protection Engineering, 35(1), 105-110.
Zand, E. and Baghestani, M. A. (2002). Weed herbicides resistance. Mashhad: Ferdowsi University of Mashhad Publications.
Zand, E., Mousavi, S. K. and Heidari, A. (2010). Herbicides and their application. Mashhad: Ferdowsi University of Mashhad Publications.
 
 © 2019 by the authors. Licensee SCU, Ahvaz, Iran. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-Non Commercial 4.0 International (CC BY-NC 4.0 license) (http://creativecommons.org/licenses/by-nc/4.0/)