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Response of Four Rice (Oryza sativa) Cultivars to Triclopyr
David L. Jordan, Dearl E. Sanders, Steven D. Linscombe and Bill J. Williams
Vol. 12, No. 2 (Apr. - Jun., 1998), pp. 254-257
Stable URL: http://www.jstor.org/stable/3988384
Page Count: 4
You can always find the topics here!Topics: Rice, Herbicides, Panicles, Grains, Crop science, Weed control, Crops, Fertilization, Collective farms, Monographs
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Experiments were conducted from 1994 through 1996 to determine the response of the rice cultivars 'Bengal,' 'Cypress,' 'Jodon,' and 'Kaybonnet' to triclopyr at 0.42 (standard rate) and 0.84 kg ai/ha applied postemergence at the four-leaf and panicle initiation stages of growth. Applications at the four-leaf stage were made in close association with fertilization and flood establishment, which often increases the potential for triclopyr to injure rice. Visible injury from triclopyr was slightly higher for the cultivar Jodon than for the cultivars Bengal, Cypress, or Kaybonnet. Injury was 3% or less when triclopyr at 0.42 kg/ha was applied at panicle initiation regardless of the cultivar. Triclopyr at 0.42 and 0.84 kg/ha applied at the four-leaf growth stage injured rice 7% and 22%, respectively. Triclopyr at 0.84 kg/ha applied at the four-leaf stage of growth delayed days from seedling emergence to seed head emergence and rice grain yield, irrespective of cultivar.
Weed Technology © 1998 Weed Science Society of America