RT Journal Article SR Electronic T1 Update Note Concerning Horticultural Oil Concentrations for Verdant Use JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 51 OP 52 DO 10.48044/jauf.1989.011 VO 15 IS 2 A1 R.W. Baxendale A1 W.T. Johnson YR 1989 UL http://auf.isa-arbor.com/content/15/2/51.abstract AB Previous work has provided evidence that verdant use of 3% horticultural oil is a highly effective means of controlling a wide range of arthropod pests. Results given here indicate that in most cases equally good control may be obtained using Sunspray 6E oil at the 2% level.