Even when normal spring weather is expected, late February and early March fertilizer applications are generally too early. The recent dry weather has resulted in increased infestations of lacebugs on azaleas and spidermites on many species of shrubs and flowering plants. Lacebugs are found feeding on the underside of azalea leaves. They pierce and suck sap, resulting in foliage that takes on a stippled or whitish cast. Di-Syston granules can also be applied to the soil beneath plants for systemic control of these pests.
Spider mites feed on a wide range of ornamental plants.
Until normal rainfall patterns return, plants should be inspected weekly and infested plants should be treated. Use a hand lense and examine the undersides of leaves. Look carefully because mites are tiny, measuring only one - fiftieth of an inch in length. Products for control include insecticidal soap, Kelthane and Di-Syston granules. There are currently several species of ornamentals that are being heavily infested with spider mites.