Iranian Journal of Field Crop Science

Iranian Journal of Field Crop Science

Efficacy of new herbicides triafamone + ethoxysulfuron, flucetosulfuron and pyrazosulfuron-ethyl on paddy fields weed control

Document Type : Research Paper

Authors
Farzin Pouramir 1
Bijan Yaghoubi 2
Hashem Aminpanah 3
1 Rice Research Institute of Iran
2 Rice Institute
3 Agronomy and plant breeding department, Rasht Branch, Islamic Azad University, Rasht, Iran
10.22059/ijfcs.2018.257165.654467
Abstract
Field experiment was conducted at Rice Research Institute of Iran, Rasht in 2017 to study the efficacy of some new herbicides in controlling the weeds of rice fields in comparison to current herbicides. Treatments were included: triafamone+ethoxysulfuron (Council), flucetosulfuron (Zechor), pyrazosulfuron-ethyl 10% WG (Saathi), Pyrazosulfuron-ethyl 75% WG (Piroz) (all in recommended and two times the recommended dosage) and recommended dose of current herbicides, butachlor (Machete)+bensulfuron-methyl (Londax) and pretilachlor (Rifit)+bensulfuron) plus weedy and hand-weeded control. Results showed that new herbicides, up to two times the recommended dosage, did not have any phytotoxicity symptoms on rice while recommended dosages of common herbicides led to 5-15% phytotoxicity. The efficacy of new herbicides (flucetosulfuron and triafamone+ethoxysulfuron) in weed controlling was similar to common herbicides, while the efficacy of both pyrazosulfuron formulations was not acceptable. Overall, the results of this study showed that two new herbicides (flucetosulfuron and triafamone+ethoxysulfuron), due to high efficiency in controlling a wide range of weeds has the capacity to be replaced the current herbicides (butachlor and pretilachlor) that are going to be eliminated due to environmental concerns in future.
Keywords
Chemical control
rice
yield reduction

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Iranian Journal of Field Crop Science
Volume 50, Issue 4
Winter 2020
Pages 127-136

  • Receive Date 09 May 2018
  • Revise Date 19 November 2018
  • Accept Date 01 December 2018
  • Publish Date 21 January 2020