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application.
Remove the lower leaves as they turn yellow. Plants growing under good conditions will periodically have a few of the older leaves die. Rapid loss of many leaves may indicate, a more serious problem, such as root rot or chilling.
Insects and Root Rot Problems
Can Be Handled
Mites, mealybugs, and root rot pathogens are the most serious problems with dieffenbachia. Mites and insects in the home can be controlled with pesticides labeled for use on dieffenbachia or foliage plants. Another prevention is to wash plants about as often as a family pet might be bather. Wash the top and undersides of plant leaves with warm, soapy water and then rinse well. This not only makes the leaves shiny, but it allows the plant to photosynthesize light much better.
Root rot problems can usually be avoided by not allowing the potting mixture to stay constantly wet. A reminder: This plant is poisonous if swallowed.
Dr. Diane Relf is a horticulture specialist with Virginia Cooperative Extension and is a member of the faculty of Virginia Tech.
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