Table 1.

Twenty most common plants monitored In a 1982 Maryland arborist IPM program.

Plants	No. plants/No. sites	% of total
Azalea	2286/25	20.5
Boxwood	973/14	8.7
Japanese holly	946/20	8.5
Juniper	625/15	5.6
Hemlock	521/15	4.7
Yew	362/21	3.3
Rose	344/14	3.1
Rhododendron	244/21	2.2
Flowering dogwood	237/21	2.1
White pine	206/13	1.8	−60.5%
Chinese holly	182/11	1.8
Euonymus	165/8
Viburnum	145/10	”
American holly	129/19	”
English holly	117/11	”
Cherry laurel	116/4	”
Arborvitae	98/10	”
Barberry	91/7	”
Ligustrum	83/9	”
Hosta	83/9	”	−70.5%