| INSECT & HOST PLANTS | TIME TO TREAT | PRODUCT TO USE |
|
EUONYMUS SCALE White flecks along the stems and on the leaves Euonymus vines, boxwood, holly, pachysandra, honeysuckle & others |
March - Early April Early June (when Japanese Tree Lilacs begin to bloom) Repeat periodically through month of August |
Dormant Oil Sevin or Malathion |
|
MAGNOLIA SCALE Large brown scales with a waxy coating on twigs and branches; can result in sooty mold on excreted honeydew Magnolia |
March - Early April August - September |
Dormant Oil Sevin |
|
PINE NEEDLE SCALE White flecks along needles Pines and occasionally on spruces, hemlock, yews & other evergreens |
March - April Late May (when VanHoutte Spirea blooms) Early August |
Dormant Oil Malathion Malathion |
|
COTTONY MAPLE SCALE Looks like popcorn on branches; can result in sooty mold on excreted honeydew Silver maple and occasionally on elm, honeylocust, white ash, linden, oak, apple, sycamore & willows |
June (when Annabelle Hydrangea is in full bloom); repeat in 10-14 days |
Malathion |
|
OYSTERSHELL SCALE Brown or gray oval bumps like shells along the stems Dogwoods, lilacs, plum, pear, birch, cotoneaster, crabapple hydrangea, Viburnum, maple, elm & linden |
March - Early April May or Early June (when Honeysuckle is in full bloom) |
Dormant Oil Malathion |
|
FLETCHER SCALE (formerly Taxus Lecanium Scale) Glossy brown oval bumps with white eggs underneath; can result in sooty mold on excreted honeydew Yews, juniper & arborvitae |
Late April - Early May (when Redbud begins flowering); repeat in 2 weeks Alternative application can be made in June-July (when Bottlebrush Buckeye or Yucca are blooming) |
Malathion with high pressure spray to reach interior of plants Malathion |