Evaluation of the Efficiency of Clipfort (Clopyralid, SG 72%) Herbicide in Rapeseed Fields of Fars Province

Document Type : Research Article

Authors

• E. Mamnoie ¹
• N. Bagherani Torshiz ²
• A.R. Askari Kelestani ³

¹ Assistant Professor of Plant Protection Research Department, Fars Agricultural and Natural Resources Research and Education Center, AREEO, Darab, Iran

² Assistant Professor of Khorasan Razavi Agricultural and Natural Resources Research and Education Center, AREEO, Mashhad, Iran.

³ Assistant Professor of Fars Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Darab, Iran

10.22067/jpp.2022.73872.1065

Abstract

Introduction
 Brassica napus L. is one of the most important crops in the world and Iran which accounts for about 20% of the world total oil production. The area under cultivation of this crop is 13,000 hectares in Fars province. Weed interference is also one of the most important limiting factors which decrease crop yields. Weed can decrease crop yield by competing for resources such as water, light and nutrients and production of allelopathic compounds. Weed competition reduced average onion yield by 50% compared with the weed-free control. The most important broad leaf weeds of rapeseed in Fars province are including Carthamus oxyacanthus M.B., Capsella bursa-pastoris, Centaurea solstitialis L., Polygonum aviculare L., Mavla neglecta wallr, Descurainia Sophia (L.) Webb&Berth, Veronica persica L., Sinapis arvensis L. Application of herbicides is the most prevalent method of weed control in Rapeseed fields. Herbicides are recommended for control of broad leaf weeds in rapeseed included of trifluralin, clopyralid and butizanstar. Clipfort is a new herbicide of broadleaf weeds product from Barzegar Barjesteh containing 720 g kg^-1 Clopyralid, formulated as a soluble granule (SG). This experiment was conducted to evaluate the efficacy of Clipfort herbicide with some preplant, preemergence and postemergence registered herbicides on weed control and rapeseed yield.
Materials and Methods
 In order to study the effect of herbicides to control broad leaf weeds of rapeseed fields, an experiment was conducted during 2020- 2021 at Fars Agricultural and Natural Resources Research and Education Center, Darab, Iran. Plots were located on a clay loam soil with pH 7.9. This experiment was carried out in randomized complete block design with 9 treatments and 3 replications. The treatments included post emergence application of Clipfort (Clopyralid, SG 72%) at dose rates of 150, 167,184, 201 g/ha or 108, 120, 132 and 144 a.i. ha^-1, post emergence application of Lontrel (Clopyralid, SL 30%) at dose rate of 800 mm/ha or 240 a.i. ha^-1, post emergence application of Watch (Clopyralid, SL 30%) at dose rate of 800 mL ha^-1 or 240 a.i. ha^-1, preemergence application of butisanstar (quinmerac+ metazachlor, SC 41.6%) at dose rate of 205 mL ha^-1 or 1040 a.i. ha^-1, preplant soil application Treflan (trifluralin , EC 48%) at dose rate of 2000 mm/ha, or 960 a.i. ha^-1 and ) and weed free. The narrow leaf weeds were control by Gallant-super (haloxyfop-r-methyl ester 10.8% EC) at dose rate of 1000 mL ha^-1 in the 3–4 leaf weeds. The herbicides were applied using a Matabi sprayer equipped with an 8002 flat fan nozzle tip delivering 300 L ha^-1 at 200 kP bar spray pressure. Weed numbers and dry weights were determined in random 0.50-m² quadrates per plot. The grain yield and biological yield were recorded for a 2 m² and 0.30 m² from each plot, respectively. Traits were recorded including density, biomass of weed and control percentage of weed, and grain yield and biological yield. Statistical analyses of data were done with SAS var 9 software and comparison of mean was tested using the LSD test at 5% level.
Results and Discussion
 Broad-leaf weeds infestations included Hirschfeldia incana L., Decurania sophia L., Carthamus oxyacanthus L., Centaurea pallescens L., Veronica persica L., Malva neglecta L. The highest and lowest relative density was V. persica and H. incana 52 and 7 percent respectively. The highest and lowest relative weight was C. oxyacanthus and V. persica 31 and 11 percent respectively. The statistical analysis of the data on the weed density and biomass revealed that herbicides were applied significantly decreased the weed density and biomass. Visual observation confirmed that these weeds were effectively controlled using the Clipfort herbicide. Results showed that applications of Clipfort herbicide at dose rates of 201 g ha^-1 provided excellent control of the mention weeds. Thise treatment decreased weed density of H. incana (90 %), D. sophia (98 %), C. oxyacanthus (98 %), C. pallescens (100%), V. persica (66 %), M. neglecta (80 %) and total weed (88%) compared to weed infested control. Also, this treatment decreased weed biomass of H. incana (95%), D. sophia (98%), C. oxyacanthus (99%), C. pallescens (100%), V. persica (68%), M. neglecta (82%) and total weed (91%) compared to weed infested control. However, butizan-star herbicide had the highest control of V. persica. This herbicide decreased density and weed biomass of V. persica by 94 and 97 percent comported to infested control. The grain yield and biological yield were 2.2 and 7.6-ton ha^-1 respectively when applied Clipfort herbicide at dose rates of 201 g ha^-1. This treatment also increased grain yield and biological yield by 36 and 30 percent, respectively.
Conclusion
 Results showed that the best results achieved from applications of Clipfort herbicide at dose rates of 201 g ha^-1. This treatment decreased density and biomass weeds, and increased rapeseed yield. Therefore, the application of Clipfort herbicide (201 g ha^-1) is recommended for canola fields.

Keywords

• Broadleaf
• Control efficacy
• Density
• Dry weight
• Weed

20.1001.1.29808170.1401.36.3.5.6

Main Subjects

• Weed

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جلد 36- 4 1401

References

1. Badowski, M., & Kuchaski, M. (2008). Biological evaluation of new herbicide BAS 76900H in winter oilseed repe crop. Oil Seed Crops 29: 113-120.
2. Drobny, H.G., & Schlang, N. (2012). Salasa (Ethametsulfuron- methyl 75% WG): A novel selective herbicide for oilseed rape in Europe. 25^th German working meeting on issues of weed biology control, 13-15. March 2012, Braunschweig (Abstract English). https://doi.org/10.5073/jka.2012.434.068.
3. Forouzandeh, S.A., Elahifard, E., Heidarpour, N., & Siyahpoush, A.A.R. (2017). Effect of tillage systems and herbicide application in weed control of canola (Brassica napus). Journal of Crop Ecophysiology 11(1): 163- 177.
4. Gargouri, K.L., Ghanmi, A., & Khammassi, E.M. (2019). Effect of sowing dates and of herbicides on weeds and yield of two varieties of canola. Annales de l’INRA 92: 97-111. (In Persian with English abstract)
5. Ghezeli, F., & Shimi, P. (2010). Effect of two kinds of Clopyralid (lontrel 300) overdose and Butisanstar (quinmerack+metazachlor) and their comparison on Canola growth attribute. In: Proceedings of the 19^th Iranian Plant Protection Congress 31 July - 3 August, 2010, Tehran, Iran. (In Persian with English abstract)
6. MAJ. 2019. Crop production. Agriculture of Statistic Database. Agriculture Products. Ministry of Jihad-e-Agric. 1: 137 Pp. Available online at http//www.agri-jahad.ir. (In Persian)
7. Moradi, K., Mohammadvand, E., & Asghari, J. (2020). The efficacy of some herbicides and cultivation on weed control and rapeseed (Brassica napus L.) yield. Journal of Plant Protection 34(2): P. 243-258. https://doi.org/10.22067/jpp.v34i2.84924.
8. Nouralizadeh, O.M., Nakhzari, M.A., Gholamalipour, E., Mollashahi, M., & Rameah, V. (2020). Effect of row spacing and herbicide application on weed control, photosynthetic pigments, grain and oil yield of rapeseed (Brassica napus). Journal of Crop Ecophysiology 4(3): 447-464. (In Persian with English abstract) https://doi.org/10.30495/jcep.2020.679072.
9. Pourazar, R. )2010(. Possibility this herbicide with other current herbicides in Khuzestan Province. Proceedings of the 19^th Iranian Plant Protection Congress, 31 July- 3 August, 2010, Tehran, Iran. (In Persian with English abstract)
10. Salimi, H., Ahmadi, M., Barjasteh, A.R., Hatami, S., Delghandi, M., Fereidoonpoor, M., Ghanbari, B.D., Narimani, V., Yunesabadi, M., Nazer, K.H., & Sajedi, S. )2004(. Identification, density and phenology of dominant canola weeds in ten provinces. Proceedings of the16^th Iranian Crop Protection Congress, 28 August– 1 September 2004, University of Tabriz, Tabriz, Iran. (In Persian with English abstract)
11. Samadni, B., & Karaminejad, )2015(. Effect of integration of planting date with stale seedbed, mechanical and chemical weed control on rapeseed yield in Varamin and Karaj. Weed Research Journal 7(2): 23-34. (In Persian with English abstract)
12. Shimi, P., Saeidi, H., Abtali, Y., Poorazar, R., & Maleki, I. (2008a). Testing butisanstar in canola. Final on farm research report. Iranian Research Institute of Plant Protection, Plant Protection Organization and Ministry of Agriculure Agronomic Affairs. (In Persian with English abstract)
13. Shimi, P., Darvish, N., & Mighani, F. (2014a). Investigating efficiency of new Butisanstar (metazachlor+ qinmerac) herbicide to weeds control in canola. Quarterly Journal of Crop Production Research (Environmental Stresses in Plant Science) 6(1): 31-38. (In Persian with English abstract)
14. Shimi, P., Haghighi, A., Abtali, Y., Pourazar, R., Jamali, M.R., & Nooralizadeh, M. (2014b). Investigating combination of herbicides in canola for better control of weeds, with special reference to brassica weeds. Iranian Journal of Weed Science 10: 21-31. (In Persian with English abstract)
15. Shimi, P., Jafarzadeh, N., & Jahedi, A. (2008b). Investigating efficacy of isoxaben to control wild mustard (Sinapis arvensis) and other broad leaf weeds in cold region oilseed rape fields. Iranian Journal of Weed Science 4(2): 1-8. (In Persian with English abstract)
16. Shimi, P., Poorazar, R., Ghezeli, F., & Sasanfar, H. (2014c). Efficiency of two commercial forms of clopyralid at different doses in controlling canola weeds. Iranian Journal of Weed Science 10: 145-153. (In Persian with English abstract)
17. Shimi, P., Saeidi, H., Meighani, F., & Llabbafi, M.R. (2013). Investigating efficiency of new herbicides to control cruciferous weeds in canola fields. Quarterly Journal of Crop Production Research (Environmental Stresses in Plant Science) 5(4): 311-324. (In Persian with English abstract)
18. Somani,I. (1992). Dictionary of weed science. Agronomy Publishing Academy (India), 256 pp.
19. Wang, L., Liu, Q., Dong, X., Liu, Y., & Lu, J. (2019). Herbicide and nitrogen rate effects on weed suppression, N uptake, use efficiency and yield in winter oilseed rape (Brassica napus). Global Ecology and Conservation 17: 1-10. https://doi.org/10.1016/j.gecco.2019.e00529.
20. Yanev, M. (2020). Weed control in oilseed rape (Brassica napus). Scientific Papers. Series A. Agronomy 63(1): 622-631. URL: https://agronomyjournal.usamv.ro/pdf/2020/issue_1/Art87.pdf.
21. Zand, E., Baghestani, M.A., Nezamabadi, N., Shimi, , & Mousavi, S.K. (2019). A guide for herbicides in Iran. University Press Center, 216pp. (In Persian)
22. Zohrabi, A., Naderidarbaghshahi, M., & Jalalizand, A. (2012). Chemical weed control of autumnal rapeseed in Isfahan (Iran). International Journal of AgriScience 2(8): 696-701. (In Persian with English abstract)