Weed competition is the major biological stress affecting cassava production in smallholder farms in West and Central Africa, where yields are low compared with those in Asia and Latin America. Options for improved weed management are crucial in increasing productivity. Selected pre- and post-emergence herbicides, integrated with appropriate tillage and plant spacing, were tested in 96 sites in four locations in Nigeria, 24 in 2016 and 72 in 2017. Trials were split plots with six pre-emergence herbicides and no post-emergence treatment as main plots. Subplot treatments were four post-emergence herbicides, weeding with a motorized rotary weeder, short- and long-handled hoes, and no post-emergence weed control, i.e., regardless of pre-emergence treatments. Indaziflam-based treatments, irrespective of post-emergence treatment, and flumioxazin + pyroxasulfone applied pre-emergence followed by one weeding with a long-handled hoe provided >80% control of major broadleaf and grass weeds. Compared with herbicide use, farmer control practices (53%) were not efficient in controlling weeds. The highest root yield was produced where (1) s-metolachlor was combined with atrazine, and one weeding with a long-handled hoe or clethodim with lactofen, and (2) indaziflam + isoxaflutole was combined with glyphosate. An increase in root yield from 3.41 to 14.2 t ha-¹ and from 3.0 to 11.99 t ha-¹ was obtained where herbicides were used compared with farmers’ practice and manual hoe weeding. Our results showed that integrating good agronomic practices with safe and effective use of appropriate herbicides can result in root yield >20 t ha^−1. i.e., twice the national average root yield of 8–12 t ha⁻¹, with >50% net profit. The use of appropriate herbicides can reduce the amount of manual labor required and improve livelihoods, specifically for women and children. Smallholder cassava farmers would require continuous training on the safe use and handling of herbicides to improve efficiency and prevent adverse effects on humans and the environment.

杂草竞争是影响西非和中非小农农场木薯生产的主要生物压力，与亚洲和拉丁美洲相比，那里的产量较低。改进杂草管理的选项对于提高生产力至关重要。选定的芽前和芽后除草剂与适当的耕作和株距相结合，在尼日利亚四个地点的 96 个地点进行了测试，2016 年为 24 个，2017 年为 72 个。出苗处理为主地块。次小区处理是四种芽后除草剂，用机动旋转式除草机、短柄锄头和长柄锄头除草，没有芽后杂草控制，即，不管芽前处理。以茚满为基础的治疗，无论芽后处理如何，和氟虫嗪 + 吡咯磺草酮在出苗前施用，然后用长柄锄头除草一次，对主要阔叶杂草和禾本科杂草的控制率超过 80%。与使用除草剂相比，农民控制措施 (53%) 在控制杂草方面效率不高。在以下情况下产生最高的根产量：(1) 异丙甲草胺与莠去津结合使用，用长柄锄头或烯草醚与乳酸菌一起除草，以及 (2) 茚虫草 + 异恶唑草胺与草甘膦结合使用。根产量从 3.41 吨公顷增加到 14.2 吨公顷 在以下情况下产生最高的根产量：(1) 异丙甲草胺与莠去津结合使用，用长柄锄头或烯草醚与乳酸菌一起除草，以及 (2) 茚虫草 + 异恶唑草胺与草甘膦结合使用。根产量从 3.41 吨公顷增加到 14.2 吨公顷 在以下情况下产生最高的根产量：(1) 异丙甲草胺与莠去津结合使用，用长柄锄头或烯草醚与乳酸菌一起除草，以及 (2) 茚虫草 + 异恶唑草胺与草甘膦结合使用。根产量从 3.41 吨公顷增加到 14.2 吨公顷¹和从 3.0 到 11.99 t ha- ¹获得了与农民的做法和手工锄头除草相比使用除草剂的情况。我们的结果表明，将良好的农艺实践与安全有效地使用适当的除草剂相结合可以使根产量 >20 t ha ^-1。即，是全国平均根产量 8-12 t ha ^{-1 的}两倍，净利润 >50%。使用适当的除草剂可以减少所需的体力劳动并改善生计，特别是对妇女和儿童而言。木薯小农需要持续进行除草剂安全使用和处理方面的培训，以提高效率并防止对人类和环境产生不利影响。