The white masses could be mealy bugs, a type of sap-sucking pest. Use a strong jet of water to wash them off and a pesticide like summer oil to suffocate them. Apply the pesticide thoroughly and ...

The active ingredients in systemic insecticides such as neonicotinoids, acephate, dinotefuran, and imidacloprid can vary in their effectiveness against different types of mealybug species. It is ...