Soybean is emerging as an important legume and oil crop in Ethiopia. However, the crop has been facing serious threats from Asian Soybean Rust (ASR), causing significant damage to the crop and not allowing it to realize its potential. This study aimed to determine the interaction of three varieties with various fungicide treatments across two seasons and two locations to manage ASR. The experiment was laid out in a RCBD in a factorial [three soybean varieties (V) and six fungicides (F)] treatment combination at two locations (L) for two years (Y) with three replications. The analysis of variance across seasons revealed highly significant V × F × Y interactions for grain yield, and F × Y interactions for severity (%) and AUDPC; while efficacy was significant (P = 0.05). The V × Y interaction showed highly significant differences for AUDPC. Across locations, there were highly significant differences for V × F × L for grain yield and V × L for AUDPC. It was only AUDPC that showed significant (P = 0.05) for the V × F interaction. There were two rates (0.75 and 1 l ha⁻¹) of the fungicide Opera Max that provided the best protection against ASR across locations, varieties, and seasons. The yield loss on the unsprayed control treatment ranged between 29 and 65%. The evidence generated from this study clearly demonstrates the importance of identifying the right variety, rates and types of fungicides for the control of ASR for higher production and productivity of soybean in Ethiopia.

大豆正在成为埃塞俄比亚重要的豆类和油料作物。然而，该作物一直面临着亚洲大豆锈病的严重威胁(ASR)，对作物造成重大损害，使其无法发挥其潜力。本研究旨在确定三个品种与不同杀菌剂处理在两个季节和两个地点之间的相互作用，以管理 ASR。该实验在 RCBD 中进行，在两个位置 (L) 进行了两年 (Y) 的阶乘 [三个大豆品种 (V) 和六种杀菌剂 (F)] 处理组合，并进行了三次重复。跨季节的方差分析显示，粮食产量的 V × F × Y 相互作用非常显着，严重性 (%) 和 AUDPC 的 F × Y 相互作用；而疗效显着（P = 0.05）。V × Y 交互作用显示出 AUDPC 的高度显着差异。在不同地区，粮食产量的 V × F × L 和 AUDPC 的 V × L 存在显着差异。只有 AUDPC 对 V × F 相互作用表现出显着性（P = 0.05）。有两种费率（0.75 和 1 l ha⁻¹ ) 的杀菌剂 Opera Max，它提供了针对不同地点、品种和季节的 ASR 的最佳保护。未喷洒的对照处理的产量损失在 29% 和 65% 之间。这项研究产生的证据清楚地表明，确定正确的杀菌剂品种、比率和类型对于控制 ASR 以提高埃塞俄比亚大豆的产量和生产力的重要性。