Mealybugs and scales
resulting in considerable damage in ornamental and fruit crops and loss of value. Armoured scales do not produce honeydew. The concealed habit and the protective [...] well as the white, waxy secretion of the mealybugs, reduces the ornamental value of the affected plants. Fruit and flowers are also fouled, rendering them [...] unfit for sale. A very small population can thus cause considerable loss of value. Soft scales feed mostly on leaves and twigs, causing discolouration of foliage