Lightning, Pursuit and Scepter are IMI or IMI-containing package-mixes. These herbicides can only be used on IR (imidazolinone-resistant) or IT (imidazolinone-tolerant) corn varieties such as Clearfield or severe injury will result. These hybrids are also recommended when a risk of Pursuit or Scepter carryover makes the planting of standard varieties impractical. Continuous use of a herbicide or herbicides with a single site of action encourages the development of resistant weeds. The use of IMI herbicides in corn is not recommended due to the increased risk of weed resistance development.
