Evaluation of the Efficiency Of Some Herbicides For Controlling the Weeds Outgrowth in Onion Field (Allium Cepa L.)

Ammar Jassim Al-Khaz’Ali*(1), and Khudair A. Salman (1) and Ahmed Sh. Ahmed (1)

(1). Office of Agricultural Research, Ministry of Agriculture, Baghdad, Iraq.

(*Corresponding author: Ammar Jassim Al-Khaz’Ali. E-Mail: a_ammarjassim@yahoo.co.uk)

Received: 5/09/2021           Accepted: 20/02/2022

Abstract: 

This study was conducted to evaluate the influences of various herbicides for weed control in onions, at Abu- Ghraib research station, Iraq. during the winter growing season of 2018/2019. The experiment was applied using a Randomized Complete Block Design (RCBD) in three replications.  Each replication comprised four herbicides treatment were (Oxyfluorfen (24 g. h-1), Flumzifop – P- Butyl (120 g. h-1), Haloxyfop-R-Methylester (108 g. h-1), and Pendimethalin (660 g. h-1), In addition to weed free plot and a weedy check. Result showed that Oxyfluorfen had the lowest weed density 1.7 plant. m-2 at control ratio of 84.5% followed by Pendimethalin 2.0 plant. m-2 at control ratio of 81.7%, as compared to the weedy check 11.0 plant. m-2. Similarly, the maximum average weight of onion bulbs 98.55 g, and yield 20347.67 kg. ha-1 were recorded in the weed free plots followed by Pendimethalin 81.88 g and 18014.33 kg. ha-1 as compared to weedy check 45.17 g and 7896.00 kg. ha-1. From this study we conclude that all the herbicides that used have reduced the number of weeds and their dry weights by  depending on the nature of the chemical composition of the herbicide in comparison with control treatment and thus increasing the total onion yield.

Keywords: herbicides, weed free, weed management, onion.

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