The demand for rice to meet the dietary need in low-income countries is expected to witness an exponential rise as the population increases. Meeting the rice demand domestically has remained challenging due to significant yield loss caused by several biotic and abiotic factors. Among these factors, one of the most important is the high weed pressure that ravages the upland rice ecology. In Nigeria, several independent weed control techniques, such as physical, chemical and cultural methods, have been recommended and adopted for weed control across varying rice upland ecologies. However, outcomes of these approaches when used independently have not consistently led to an increase in yield. There remains an outstanding deficit between the actual yield and the potential rice yield. This review aimed to identify potential research gaps, and quest effective and sustainable weed management strategies in smallholder upland rice farming systems in Nigeria. A critical analysis of studies suggests the potential of sustainable weed management practices if adopted and adapted smartly in different upland ecologies in Nigeria. Competitiveness of upland rice against weeds can be enhanced through strategic integration of weed competitive cultivars, optimum nitrogen application timings (within weed-free periods), uniform plant spacing, and high seeding rates, with conventional herbicide/manual weed control practices. However, such management practices can only be engaged where inputs are supplied on time and the technical know-how is extended to farmers. The review equally highlights potential research gaps for further studies.

Oyebanji O.ALAGBO;Oluyemisi A.AKINYEMIJU;Bhagirath S.CHAUHAN

Department of Crop Production and Protection,Faculty of Agriculture,Obafemi Awolowo University,Ile-Ife 220005,Nigeria;Department of Crop,Soil and Pest Management,Ondo State University of Science and Technology,Okitipupa 353,Ondo-State,Nigeria;Queensland Alliance for Agriculture and Food Innovation/School of Agriculture and Food Sciences,The University of Queensland,Gatton 4343,Queensland,Australia

水稻科学（英文版）

[1]Oyebanji O.ALAGBO;Oluyemisi A.AKINYEMIJU;Bhagirath S.CHAUHAN-.Weed Management in Rainfed Upland Rice Fields under Varied Agro-Ecologies in Nigeria)[J].水稻科学（英文版）,2022(04):328-339

Rainfed,Ecologies,ravages

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