Influence of AE F130060 03 Application Timing on Italian Ryegrass (Lolium multiflorum) Control

Thomas E. Hines, William A. Bailey, Henry P. Wilson

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Experiments were conducted in Virginia in 2000 and 2001 to investigate responses of winter wheat and diclofop-sensitive and -resistant Italian ryegrass to the experimental herbicide mixture AE F130060 03 and crop safener AE F107892 applied postemergence. AE F130060 03 at 15 or 18 g ai/ha with or without methylated seed oil controlled both diclofop-sensitive and -resistant Italian ryegrass 82 to 99% and reduced inflorescence emergence 59 to 98%. Although AE F130060 03 controlled existing Italian ryegrass 4 wk after any application, timing of application influenced late-season Italian ryegrass control and inflorescence emergence. Applications to two- to three-leaf Italian ryegrass resulted in greater emergence of Italian ryegrass after application than applications made to two- to three-tiller or four- to five-tiller Italian ryegrass. Wheat injury by AE F130060 03 was greater than injury from diclofop, but wheat appeared to fully recover; and yields from AE F130060 03-treated wheat were similar to yields of diclofop-treated wheat and at least 21% greater than yields from nontreated wheat. In greenhouse experiments, differential growth responses between diclofop-sensitive and -resistant Italian ryegrass occurred after AE F130060 03 application at normal (15 g ai/ha) and below-normal application rates. When rates were increased beyond normal application rates, growth responses were similar between diclofop-sensitive and -resistant Italian ryegrass.

Original languageEnglish
Pages (from-to)842-853
Number of pages12
JournalWeed Technology
Issue number4
StatePublished - Oct 2003


  • Diclofop resistance
  • Resistance management

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science


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