Subject Areas : Journal of Crop Ecophysiology

Saeed Reza Yaghoobi ^{1 *} , Arash Roozbahani ²

1 - Faculty of agricultural science, technical and vocational university, TVU
2 - Professor assistant, Department of Agronomy and Plant Breeding, Islamic Azad University, Roudehen branch, Roudehen, Iran

Received: 2023-02-22 Accepted : 2023-04-29 Published : 2024-09-22

Keywords: field crop, integrated weed management, yield, herbicide,

Abstract :

In order to evaluation of tank mixing Imazethapyr and Pendimethalin along with cultivation on natural weed population in Red Bean, an experiment was carried out during two years in RCBD as split plots arrangement with three replications. The main plots in both experiments included cultivation and non-cultivation. The sub plots in the 1st year experiment were the application of Imazethapyr as pre-emergence 50 and 100 and post-emergence 30, 50 and 100 g a.i. ha-1. The sub plots in the 2nd year experiment included Imazethapyr 100 plus Pendimethalin 990 g a.i. ha-1, Imazethapyr 50 plus Pendimethalin 495 g a.i. ha-1, and Pendimethalin 495 and 990 and Imazethapyr 50 and 100 g a.i. ha-1 each one alone. Actually, weed infestation considered as control in all experiments. In the 1st year, the application of Imazethapyr as pre and post-emergence reduced the density and biomass of Field bindweed, Redroot pigweed and Lamb's quarters five times more than control, but the application of imazethapyr 100 g a.i. ha-1 as pre-emergence along with cultivation was the most effective treatment and obtained 2730.5 kg ha-1 red bean grain yield. In the 2nd year of experiment, application of Imazethapyr 50 plus pendimethalin 495 g a.i. ha-1 along with cultivation, induced proper weed control and 3470 kg ha-1 red bean grain yield. Although application of Imazethapyr 100 plus pendimethalin 990 g a.i. ha-1 along with cultivation was very effective in weed control, but it reduced the red bean grain yield to 2914 kg ha-1. According to the results, pre-emergence application of Imazethapyr 50 plus pendimethalin 495 g a.i. ha-1 along with cultivation, was effective in weed control and red beans grain yield increased more than three times than control.

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