The liquid form of Orthene is impossible to find around here. Orthenex is all they sell. I prefer to keep my aphid killer be for that purpose alone. Orthenex also contains a fungicide. Killed a P. ionantha with orthenex, never a problem with orthene. For my plants, it is as follows. BanRot for root rot problems, damping off, molds, certain fungus'. Cleery 3336WP wetable powder. Worth its weight in gold for fungal probs, and systemic. Orthene (not orthenex) for aphids, thrips, scale, and any other sucking insect that feeds on beautiful CP. Whitefly don't like it either.