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By Edited by M. Olofsdotter

ISBN-10: 9712201015

ISBN-13: 9789712201011

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Extra info for Allelopathy in rice

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Foliage. Greater reduc- Weed management using allelopathic rice varieties in Egypt 35 tions in C. difformis height (63%) and fresh weight (75%) were observed when Ammannia foliage was incorporated in the plots. These data indicate that the population and growth of E. crus-galli and C. difformis can be reduced by incorporating Ammannia foliage in the top layer of soil before seeding. The growth of rice plants was clearly stimulated in soils containing Ammannia sp. foliage (Table 9). The height of rice plants increased 17%, whereas fresh weight and leaf area index increased 35% and 38%, respectively.

Djfformis was obtained using IET 11754 (77%). IET 1444, Kim Rad F-87, Dular, and CI-Selection 63 caused 50%, 63%, 69%, and 53% suppression, respectively. 1996 experiment (2b). Plant height, dry matter production, and leaf area index at 60 d after planting were recorded (Table 4). Measurements were higher for some varieties (IET 1444) than for others (such as AC 1225 and GZ 1368-5-8). Allelopathic rice varieties offered good tools for suppressing the E. crus-galli population and reducing the time and labor required to eradicate the weed (Table 5).

Smith RJ Jr, Flinchum WT, Seaman DE. 1977. Weed control in US. rice production. S. Department of Agriculture Handbook 457. S. Government Printing Office. 78 p. Smith RJ Jr. 1988. S. rice. Oryza sativa. Weed Technol. 2:232241. Whittaker RH, Feeny PP. 1971. Allelochemicals: chemical interactions between species. Science 171:757-770. Notes Authors’ address: United States Department of Agriculture. O. O. Box 351, Stuttgart, AR 72160. Citation: Olofsdotter M, editor. 1998. Allelopathy in rice. Proceedings of the Workshop on Allelopathy in Rice, 25-27 Nov 1996.

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Allelopathy in rice by Edited by M. Olofsdotter

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