Anisodontea X Hypomandarum Pests

Whiteflies

African mallow is highly susceptible to infestations of whitefly. These tiny white insects fly off en masse when the plant is disturbed. These pests can spread to other plants very quickly, particularly when plants are kept indoors, so isolate infested plants promptly. This pest can usually be addressed with sprays of soapy water every three or four days. If necessary, an insecticidal soap will eliminate whiteflies if properly applied.

Spider mites are tiny, eight-legged pests that feed on mallow, causing the leaves to develop a stippling of light dots. The leaves may eventually turn yellow and drop. Spider mites tend to be most prevalent when a plant is water-stressed and generally leave a fine silk webbing where they're living. Spider mites have many naturally occurring predators, so avoid the use of broad-spectrum insecticides, especially if the mallow is kept outdoors. Adequate water and an occasional rinsing off of leaves to remove dust will often control the mite population. If necessary, insecticidal soaps or horticultural oils should adequately address spider mite problems.

Anisodontea x hypomandarum may collapse and die suddenly if it experiences sudden death syndrome. This is the result of a root or stem rot that is usually caused by excessive watering or fertilizer or inadequate drainage during hot weather. Clay pots often provide an ideal culture, as they dry out quickly. African mallow requires a moderate amount of fertilizer only when available light is low. Reduce watering after heavy pruning.

In addition to proper fertilization and watering, the African mallow requires regular pruning to encourage flowering and control excessive growth. The first pruning should occur when the plant is about 4 or 5 inches high. Simply pinch the top off each stem. Perform an annual pruning in the late winter to encourage spring flowering and as needed throughout the rest of the season to shape the shrub. This plant responds well to pruning.