Effects of Molasses or Toxaphene on Residual Life and Efficacy of Methyl Parathion on Cotton1

Abstract
Methyl parathion residues on cotton can be protected and their efficacy against Heliothis Virescens (F.) substantially extended by application at dusk in preference to dawn. Adding molasses or toxaphene to methyl parathion sprays further extends its residual life with both dusk and dawn applications.