Michigan State University Extension
Ornamental Plants plus Version 2.0 - 00001529
01/01/98

VIBURNUM INSECT PROBLEMS

Viburnum aphid is gray to dark green and feeds in clusters  
at the tips of the branches, causing leaf curl.  Viburnum   
opulus is especially susceptible.  The insects can also be  
dislodged with high pressure water spray from the garden    
hose.                                                       

Tarnished plant bug causes brown spots on the flowers and   
young shoots.  The spots have light centers with dark       
margins.                                                    

Treehoppers lay eggs under the bark, then cover them with   
a white, sticky substance.  The white coating is the        
symptom first noticed.  No chemical control is suggested    
for this relatively minor problem.                          

Inspect the stems of unhealthy-looking plants for possible  
scale infestations.  If found, spray in early spring with   
dormant oil.  Identify the scale so crawler sprays are      
properly timed.  The preferred method of control involves   
regular inspection for early detection of the infestation   
then spraying with dormant oil.                             

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