Skip to main content Accessibility help

Rice and red rice interference. II. Rice response to population densities of three red rice (Oryza sativa) ecotypes

  • Leopoldo E. Estorninos, David R. Gealy (a1), Edward E. Gbur (a2), Ronald E. Talbert (a3) and Marilyn R. McClelland (a3)...


Red rice, which grows taller and produces more tillers than domestic rice and shatters most of its seeds early, is a major weed in many rice-growing areas of the world. Field experiments were conducted at Stuttgart, AR in 1997 and 1998 to evaluate the growth response of the Kaybonnet (KBNT) rice cultivar to various population densities of three red rice ecotypes. The ecotypes tested were Louisiana3 (LA3), Stuttgart strawhull (Stgstraw), and Katy red rice (KatyRR). Compared with KBNT alone, LA3, the tallest of the three red rice ecotypes, reduced tiller density of KBNT 51%, aboveground biomass at 91 d after emergence (DAE) 35%, and yield 80%. Stgstraw, a medium-height red rice, reduced KBNT tiller density 49%, aboveground biomass 26%, and yield 61%. KatyRR, the shortest red rice, reduced KBNT tiller density 30%, aboveground biomass 16%, and yield 21%. Tiller density of rice was reduced by 20 to 48% when red rice density increased from 25 to 51 plants m−2. Rice biomass at 91 DAE was reduced by 9 and 44% when red rice densities were 16 and 51 plants m−2. Rice yield was reduced by 60 and 70% at red rice densities of 25 and 51 plants m−2, respectively. These results demonstrate that low populations of red rice can greatly reduce rice growth and yield and that short-statured red rice types may affect rice growth less than taller ecotypes.


Corresponding author

Corresponding author. Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72704;


Hide All
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.
Do Lago, A. A. 1982. Characterization of Red Rice (Oryza sativa L.) Phenotypes in Mississippi. Ph.D. dissertation. Mississippi State University, Starkville, MS. 143 p.
Eleftherohorinos, I., Dhima, K. V., and Vasilakoglou, I. B. 2002. Interference of red rice in rice grown in Greece. Weed Sci 50:167172.
Estorninos, L. E. Jr., Gealy, D. R., and Talbert, R. E. 2002. Growth response of rice (Oryza sativa) and red rice (O. sativa) in a replacement series study. Weed Technol 16:401406.
Estorninos, L. E. Jr., Gealy, D. R., Talbert, R. E., and Gbur, E. E. 2005. Rice and red rice interference. I. Response of red rice (Oryza sativa) to sowing rates of tropical japonica and indica rice cultivars. Weed Sci 53:676682.
Fischer, A. J. and Ramirez, A. 1993. Red rice (Oryza sativa L.): competition studies for management decisions. Int. J. Pest Manage 39:133138.
Gealy, D. R., Dilday, R. H., Baldwin, F. L., and Black, H. L. 1999. Imazethapyr (‘Pursuit’) effect on red rice (Oryza sativa L.) biotypes. Pages 7988 in Norman, R. J. and Johnston, T. H. eds. B. R. Wells Arkansas Rice Research Studies-1998. Fayetteville, AR: University of Arkansas Agricultural Experiment Station. Research Series 468. Also available online at
Gealy, D. R., Saldain, N. E., and Talbert, R. E. 2000. Emergence of red rice (Oryza sativa) ecotypes under dry-seeded rice (Oryza sativa) culture. Weed Technol 14:406412.
Gealy, D. R., Tai, T. H., and Sneller, C. H. 2002. Identification of red rice, rice, and hybrid populations using microsatellite markers. Weed Sci 50:333339.
Gealy, D. R., Wailes, E. J., Estorninos, L. E. Jr., and Chavez, R. C. 2003. Rice (Oryza sativa) cultivar differences in suppression of barnyardgrass (Echinochloa crus-galli) and economics of reduced propanil rates. Weed Sci 51:601609.
Gibson, K. D., Fischer, A. J., Foin, T. C., and Hill, J. E. 2003. Crop traits related to weed suppression in water-seeded rice (Oryza sativa L). Weed Sci 51:8793.
Gravois, K. A., Moldenhauer, K. A., and Lee, F. N. et al. 1995. Registration of ‘Kaybonnet’ rice. Crop Sci 35:587588.
Guy, C. B., Beaty, J. D., Helms, R. S., Baldwin, F. L., and Dillon, T. L. 1992. Red rice control programs in soybeans. Proc. South. Weed Sci. Soc 45:65.
Jennings, P. R. and De Jesus, J. 1968. Studies on the competition in rice. I. Competition in mixture of varieties. Evolution 22:119124.
Kwon, S. L., Smith, R. J. Jr., and Talbert, R. E. 1991. Interference of red rice (Oryza sativa) densities in rice (O. sativa). Weed Sci 39:169174.
Kwon, S. L., Smith, R. J. Jr., and Talbert, R. E. 1992. Comparative growth and development of red rice (Oryza sativa L.) and rice (O. sativa). Weed Sci 40:5762.
Ni, H., Moody, K., Robles, R. P., Paller, E. C. Jr., and Lales, J. S. 2000. Oryza sativa plant traits conferring competitive ability against weeds. Weed Sci 48:200204.
Noldin, J. A., Chandler, J. M., and McCauley, G. N. 1999. Red rice (Oryza sativa) biology. I. Characterization of red rice ecotypes. Weed Technol 13:1218.
Rutger, J. N., Bryant, R. J., Bernhart, J. L., and Gibbons, J. W. 2005. Registration of nine indica germplasms of rice. Crop Sci. In press.
Saldain, N. E. 1997. Emergence of Red Rice (Oryza sativa L.) Ecotypes under Dry and Water-Seeded Rice Condition. . University of Arkansas, Fayetteville, AR. 116 p.
Slaton, N. A. and Cartwright, R. 2001. Rice stand establishment. Pages 2128 in Slaton, N. A. ed. Rice Production Handbook. Little Rock, AR: Univ. of Arkansas Coop. Ext. Serv. MP 192-10M-1-01RV.
Slaton, N. A., Moldenhauer, K., and Gibbons, J. 2001. Rice varieties and seed production. Pages 1520 in Slaton, N. A. ed. Rice Production Handbook. Little Rock, AR: Univ. of Arkansas Coop. Ext. Serv. MP 192-10M-1-01RV.
Smith, R. J. Jr. 1979. How to control hard-to-kill weeds in rice. Weeds Today 10:1214.
Smith, R. J. Jr. 1981. Control of red rice (Oryza sativa) in water seeded rice (O. sativa). Weed Sci 29:663666.
Smith, R. J. Jr. 1988. Weed thresholds in southern U.S. rice (Oryza sativa). Weed Technol 2:232241.
Vaughan, L. K., Ottis, B. V., Prazak-Havey, A. M., Bormans, C. A., Sneller, C. H., Chandler, J. M., and Park, W. D. 2001. Is all red rice found in commercial rice really Oryza sativa? Weed Sci 49:468476.
Webster, T. M. 2000. Weed survey—southern states: grass crops subsection. Proc. South. Weed Sci. Soc 53:247274.



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