Ficus trees are susceptible to the same bug infestations that plague other plants. Once a finicky ficus is suffering from an infestation, it will begin to show signs of it. It may drop its leaves, develop spots or fail to thrive. In order to bring your ficus plant back to its former glory, you may have to spray it with bug spray to get rid of its visitors. Before you spray, make sure that the insecticide you are using is labeled as safe for your ficus or you could kill it.
Water your ficus plant 24 to 48 hours before you spray it with bug spray.
Mix the insecticide according to the manufacturer's instructions if it is in concentrate form. No matter how bad the infestation, do not increase the concentration of insecticide in the solution or you could injure your ficus.
Bring indoor ficus plants outdoors to spray them. Spray the ficus tree early in the morning or late in the afternoon on a day with no wind and no rain forecast for the next 48 hours.
Spray your ficus according to the insecticide's instructions for the type of insect you are treating. For most insecticides, you will need to coat the top and undersides of the leaves, the twigs and the bark until just before the point of runoff. Follow the manufacturer's instructions for more explicit instructions.
Respray the plant, if necessary, at the intervals dictated by the bug spray's manufacturer.