Potential Optimization of Soil-Applied Herbicides in Rainfed Chickpea (Cicer arietinum L.) through Incorporation via the Sowing System

Document Type : Original Article

Authors

• Hossein Najafi ¹
• Seyed Hossein Nazer Kakhki ²
• Bita Soheili ³

¹ Iranian Research Institute of Plant Protection, Agricultural, Research, Education and Extension, Tehran, Iran

² Plant Protection Research Department, Agricultural and Natural Research and Education Center of Khorasan Razavi Province, Mashshad, Iran

³ Department of Plant Protection Research, Alarogh Agricultural Research Station, Ardabil Agricultural and Natural Resources Research and Education Center, Ardabil, Iran

10.22067/ijpr.2023.76756.1036

Abstract

Introduction
Weeds are one of the most problematic factors in chickpea production systems and chemical control of weeds is limited in Iran because of registered selective herbicides for this crop are not available for farmers. In this situation, optimizing of herbicide application (especially soil-applied herbicides) is one way that can help farmers to combat with weeds. Incorporated By Sowing (IBS) is one of the best way for optimizing of non-selective soil herbicides application in crops. The purpose of this experiment is to investigate the possibility application of non-selective soil-applied herbicides in directed planting of chickpea via IBS.
 
Material and Methods
Application possibility of non-selective herbicides in directed sowing of chickpea was evaluated in Ardabil and Zanjan in 2020. The treatments were arranged in a strip plot experiment with randomized complete block design and 3 replications. The vertical factor was herbicide application (including: trifluralin, metribuzin, pendimethalin, imazethapyr, and their combination with (phenmedipham+desmedipham+ethofumesate), and also oxyfluorfen and weedy and weed free controls. Horizontal factor was incorporated by sowing (IBS) methods (including: incorporate by seed planter and cultivator+seed planter). Seed germination of chickpea, weed density and biomass and chickpea grain yield were evaluated 30 days after herbicide application and in the end of chickpea growth.
 
Results and Discussion
IBS methods did not have a significant impact on weed and chickpea density and biomass. Therefore, the use of a cultivator before seed planting is only recommended when the seedbed is inadequately prepared or if pre-planting weed control has not been effectively executed. In contrast, herbicides had significant effects on weeds population and chickpea in experimental locations. In Ardabil, pendimetalin and pendimetalin + (phenmedipham + desmedipham + ethofumesate) were the only treatments that had low efficacy on weeds (with 48.9 and 51.7 % weed biomass reduction respectively) and other treatments had no significant difference in 30 days after herbicides application. In the end of growing season, the highest weeds biomass reduction (in compared with control) were recorded in trifluralin, metribuzin and imazethapyr in combination with (phenmedipham + desmedipham + ethofumesate) and oxyfluorfen (with 84, 83, 80 and 70 of control (%) respectively). In Zanjan, single application of trifluralin and metribuzin and their combination with (phenmedipham + desmedipham + ethofumesate) and combination of imazethapyr with (phenmedipham + desmedipham + ethofumesate) had the highest weed control with 79, 71, 78.6 and 75.5 % respectively. In contrast with Ardabil, the lowest weed control efficacy was recorded in oxyfluorfen plots (22.4%). Grain yield of chickpea was also high in trifluralin + (phenmedipham + desmedipham + ethofumesate) and was low in imazethapyr in Zanjan and Ardabil.
 
Conclusions
Application of soil herbicides (including: Metribuzin and Trifluralin) in chickpea is possible only if, farmers use them just before sowing and incorporate the herbicides into the seedbed during the sowing process.

Keywords

• Conservation agriculture
• Imazethapyr
• Oxyfluorfen
• Pendimetalin
• Trifluralin

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©2023 The author(s). This is an open access article distributed under Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source.

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