Sometimes pests are present in potting soil and healthy plants become infested during repotting. When new plants are brought home, the leaves, soil, and stems should be examined for insects. The same article recommends examining plants that have been outside before bringing them back indoors and around other plants. Also, plants that have been outdoors should be kept away from other plants, even if there are no obvious pests, for at least a week to see if a problem develops. It also suggests the removal of dead leaves or other debris because it creates a hiding place for insects.
Mealy bugs resemble white cotton, and they are located in the crevices between leaves and stems.
Direct contact with spray on these pests is necessary in order to kill them and prevent further damage. Treatment may need to be repeated before successfully eliminating this pest. Aphids are usually found outdoors, but they sometimes attack indoor plants. They are most commonly found on new growth and on plant blooms. Aphids can be green, black, or yellow in color, and they are a problem mainly during the summer months.