Michigan State University Extension
Ornamental Plants plus Version 2.0 - 00001910
01/01/98
All plants can be affected by environmental and cultural problems. Only those occurring most frequently are listed here.
Use pesticides only after an accurate diagnosis and control recommendation have been made. Use pesticides strictly in accordance with label directions. Always wear protective clothing and do not spray on windy days.
This list is for educational purposes only. Inclusion does not imply endorsement and omission does not imply discrimination. Not all of these pesticides are labeled or recommended in all states.
Viburnum
Disease Problems
Downy mildew
controls -
Insect Problems
Aphids
controls - Insecticidal soap, acephate, malathion
Cottony maple leaf scale
controls - Oil as a dormant spray. Oil, acephate,
chlorpyrifos, diazinon, malathion,
carbaryl for crawlers.
Controls reported to cause plant injury - malathion