Current status of biological control of paddy weeds in Vietnam |
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Authors: | TRAN DANG KHANH,&dagger ,TRAN DANG XUAN,DUONG VAN CHIN,ILL MIN CHUNG,&dagger ,ELZAAWELY ABDELNASER ABDELGHANY, SHINKICHI TAWATA |
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Affiliation: | Department of Crop Science, Konkuk University, Seoul, Republic of Korea,;Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, Okinawa, Japan and;Cuulong Delta Rice Research Institute, Omon, Cantho, Vietnam |
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Abstract: | Rice is a staple food in Vietnam and accounts for > 7.7 × 106 cultivated ha, which provide 35.5 × 106 t of rice, of which 4.2 × 106 t were exported in 2004. The enlargement of the cropping area and the enhancement of rice yield have rapidly increased the amount of agrochemicals, including herbicides, in crop production in Vietnam. From 1990–2003, the percentage of herbicides in total pesticides has increased ≈ 10-fold to 30.2%. In addition, the improper use of herbicides caused environmental hazards, unsafe agricultural products, and human health problems. Biological management integrated with traditional weed control techniques might help to reduce the dependence on synthetic herbicides and build eco-friendly, sustainable agricultural production in Vietnam. This paper reviews the efforts in establishing a strategy for biological management of weeds that was conducted in recent years by Vietnamese weed scientists. This has included cropping system management, water and soil management, integrated pest management, and utilization of plant allelopathy as major components of the strategy. Many plants with strong allelopathic potential can be a source for biological weed suppression and soil fertility improvement. The utilization of allelopathic properties in rice might also help to provide new rice cultivars with weed-suppressing characteristics. |
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Keywords: | allelopathy herbicide pesticide rice weed management weeds |
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