Mealybugs and scales
gain an adequate intake of protein, mealybugs must ingest large quantities of sap, getting rid of the excess sugars in the form of honeydew. Characteristically [...] the honeydew with its sooty mould is usually the first sign of the presence of this type of pest. Among ornamental crops, ferns are particularly sensitive [...] yield. Effective control of mealybugs and scales is essential to maintain healthy and marketable crops. Biological control of mealybugs and scales relies