Mealybugs and scales
honeydew. In fact, 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 [...] yield. Effective control of mealybugs and scales is essential to maintain healthy and marketable crops. Biological control of mealybugs and scales relies [...] off; plant sap is low in proteins and rich in sugars. In order to gain an adequate intake of protein, mealybugs must ingest large quantities of sap, getting