Skip to main content Accessibility help

Broadleaf Signalgrass (Brachiaria platyphylla) Duration of Interference in Rice (Oryza sativa)

  • John T. McGregor (a1), Roy J. Smith (a1) and Ronald E. Talbert (a2)


Interference from broadleaf signalgrass at a density of 180 plants/m2 reduced rough rice yields of ‘Bond’ a maximum of 48% at 95 days after rice emergence and reduced yields of ‘Mars' a maximum of 21% from season-long interference. Interference durations of 40 days or longer reduced the panicles/m2, culms/m2, and plant height of rice. Straw dry weight of Bond and Mars was reduced 41 and 26%, respectively, from season-long interference. Increased durations of weed interference did not affect the number of spikelets/panicle, percent filled spikelets, rough kernel weight, or head rice yield of either cultivar. Broadleaf signalgrass produced less dry weight and fewer panicles/m2 when grown with Mars than with Bond.



Hide All
1. Chamblee, R. W., Thompson, L., and Coble, H. D. 1982. Interference of broadleaf signalgrass (Brachiaria platyphylla) in peanuts. (Avachis hypogaea). Weed Sci. 30:4549.
2. De Datta, S. K. 1981. Principles and Practices of Rice Production. John Wiley and Sons, New York. 618 pp.
3. Diarra, A., Smith, R. J. Jr., and Talbert, R. E. 1985. Interference of red rice (Oryza sativa) with rice (O. sativa). Weed Sci. 33:644649.
4. Jennings, P. R. and de Jesus, J. Jr. 1968. Studies on competition in rice. I. Competition in mixtures of varieties. Evolution 22:119124.
5. Kawano, K., Gonzalez, H., and Lucena, M. 1974. Intraspecific competition, competition with weeds, and spacing response to rice. Crop Sci. 14:841845.
6. Minotti, P. L. and Sweet, R. D. 1981. Role of crop competition in limiting losses from weeds. Pages 351367 in Pimentel, D., ed. Handbook of Pest Management in Agriculture. Vol. II. CRC Press, Inc., Boca Raton, FL.
7. Noda, K. 1977. Integrated weed control in rice. Pages 1744 in Fryer, J. D. and Matsunaka, S., eds. Integrated Control of Weeds. Univ. Tokyo Press.
8. Smith, R. J. Jr. 1968. Weed competition in rice. Weed Sci. 18:12521255.
9. Smith, R. J. Jr. 1974. Competition of barnyardgrass with rice cultivars. Weed Sci. 22:423426.
10. Smith, R. J. Jr., Flinchum, W. T., and Seaman, D. E. 1977. Weed control in U.S. rice production. U.S. Dep. Agric. Agric. Handb. 497. 78 pp.
11. Smith, R. J. Jr. 1983. Competition of bearded sprangletop (Leptochloa fascicularis) with rice (Oryza sativa). Weed Sci. 31:120123.
12. Snipes, C. E., Street, J. E., and Walker, R. H. 1987. Interference periods of common cocklebur (Xanthium strumarium) with cotton. Weed Sci. 35:529532.
13. Steel, R.G.D. and Torrie, J. H. 1980. Principles and Procedures of Statistics. McGraw-Hill Book Co., New York. 481 pp.
14. Swain, D. J., Nott, M. J., and Trounce, R. B. 1975. Competition between (Cyperus difformis) and rice: the effect of time of weed removal. Weed Res. 15:149152.


Broadleaf Signalgrass (Brachiaria platyphylla) Duration of Interference in Rice (Oryza sativa)

  • John T. McGregor (a1), Roy J. Smith (a1) and Ronald E. Talbert (a2)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed