The sap-sucking insects suck the sap from the underside of the leaves. Affected leaves turn yellow and become sunken and eventually dry up and fall off. Sometimes the leaves also turn black. For its control, Kilmite, 1 ampoule and Greentara, 5-6 grams per 15 liters of water. Mix and sprinkle. After 6-7 days clean, 20-25 grams per 15 liters of water. and Punch, 10g. Mix and spray.