Tolerance of imidazolinone-resistant corn (zea mays) to diclosulam

John W. Wilcut, William A. Bailey

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Field experiments were conducted in 1996 and 1997 to evaluate the tolerance of imida- zolinone-resistant (IR) and non-IR corn cultivars to preemergence (PRE) and postemergence (POST) treatments of diclosulam. Crop injury was evaluated early- (5 to 6 wk after planting [WAP]), mid- (10 to 11 WAP), and late-season (13 to 15 WAP). Early-season injury of IR corn was no more than 12% in systems that included diclosulam PRE or POST at 18, 27, or 36 g ai/ha. Early-season injury of non-IR corn ranged from 85 to 89% in systems that included diclosulam PRE at any rate. At the mid-season evaluation, crop injury to IR corn was 1% or less. Non-IR corn was injured 73 to 94% in systems that included diclosulam PRE, while systems that included diclosulam POST caused 45 to 58% injury at mid-season. At the late-season evaluation, non-IR corn was injured 56, 88, and 96% with diclosulam PRE at 18, 27, and 36 g/ha, respectively, whereas systems that included diclo- sulam POST had 11 to 14% injury. Injury to IR corn from diclosulam PRE or POST was not apparent at the late-season evaluation. Weed-free yield of IR corn treated with diclosulam was 6,490 to 6,850 kg/ha and was equivalent to or better than yield from IR corn treated only with atrazine plus me- tolachlor PRE. Yield from non-IR corn treated with any diclosulam-containing system did not exceed 3,770 kg/ha.

Original languageEnglish
Pages (from-to)60-64
Number of pages5
JournalWeed Technology
Issue number1
StatePublished - Jan 2003


  • Crop injury
  • Crop tolerance
  • Discoloration
  • Stand reduction
  • Stunting

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science


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