Mealybugs damage plants by inserting their threadlike mouthparts into any part of the plant and sucking out sap. Mealybugs excrete honeydew, a sweet, sticky liquid. Sooty molds often grow in the honeydew causing infested plants to turn black.
CHICO has accumulated rich experience and could offer the corresponding high-class solutions, e.g.: Abamectin 0.5% + Profenofos 39.5%EW.