These studies suggest that when trifluralin is applied as a directed spray in commercial cotton fields, care should be exercised to avoid spraying the herbicide on the terminal or lateral buds. In fields where the cotton plants vary in size, it may be advisable to delay directed-spray application to avoid plant injury.

The glasshouse experiments reported in this article were conducted by the author at the C.S.I.R.O. Irrigation Research Laboratory, Griffith, Australia. Photos were taken by John Miller, C.S.I.R.O. photographer.