Voles (Microtus spp.)-Hort Answers - Illinois Extension
Snowmound Nippon Spirea (Spiraea nipponica 'Snowmound') Vanhoutte Spirea (Spiraea x vanhouttei) Small Fruit. Grape (Vitis vinifera) Tree. Crabapple (Malus species and hybrids) Tree Fruit. Apple (Malus pumila) European and Asian Pear (European - Pyrus communis L.; Asian - P. pyrifolia) Peach (Prunus persica)
Spirea Aphid (Aphis citricola)-Hort Answers - University of Illinois ...
Spirea aphid is found in every state on spireas and crabapples. The aphid occurs in large numbers and its feeding often causes the leaves to distort, curl and pucker. The aphid has a dark head and thorax while the abdomen is pale green. Particularly on spirea, large amounts of honeydew, and corresponding sooty mold growing on it, is produced.
Verticillium Wilt [Shrubs and Trees] - Illinois Extension
Snowmound Nippon Spirea (Spiraea nipponica 'Snowmound') Staghorn Sumac (Rhus typhina) Thunberg Spirea (Spiraea thunbergii) Vanhoutte Spirea (Spiraea x vanhouttei) Wayfaringtree Viburnum (Viburnum lantana) Western Sand Cherry (Prunus besseyi) Tree. Amur Chokecherry (Prunus maackii) Black Cherry, Wild Cherry (Prunus serotina) Blue Ash (Fraxinus ...
Oystershell Scale Lepidosaphes ulmi - Illinois Extension
There are two commonly found races of oystershell scale in Illinois. They are brown oystershell scale and gray ostershell scale. The scale overwinters as eggs under the mother's covering. Crawlers of the brown race occur on dogwood when Vanhoutte spirea is in full bloom (about mid June in Northern Illinois).
University of Illinois Extension - Selecting Trees for Your Home
Keep lilac shrubs properly pruned, removing stems over 2 inches in diameter.Avoid pruning lilacs and ash during summer months. Keep lilacs healthy - water and fertilize as needed to maintain plant vigor (however over fertilation can prevent flowering). Use an insecticide if needed when vanhoutte spirea is in full to late bloom.
University of Illinois Extension - web.extension.illinois.edu
If necessary use a recommended insecticide. Spray when Vanhoutte spirea is blooming. A second spray is needed when Hills of Snow Hydrangea blooms are turning from green to white and a third spray 7 to 10 days after the 2nd spray. A summer oil may discolor the needles.
University of Illinois Extension
Keep lilac shrubs properly pruned, removing stems over 2 inches in diameter.Avoid pruning lilacs and ash during summer months. Keep lilacs healthy - water and fertilize as needed to maintain plant vigor (however over fertilation can prevent flowering). Use an insecticide if needed when vanhoutte spirea is in full to late bloom.
Selecting Shrubs for Your Home - Sort by tolerance - Illinois …
Vanhoutte Spirea Spiraea x vanhouttei. Vernal Witchhazel Hamamelis vernalis. Wayfaringtree Viburnum ...
Selecting Shrubs for Your Home - Sort by Tolerance
Thunberg Spirea Spiraea thunbergii. Vanhoutte Spirea Spiraea x vanhouttei. Wayfaringtree Viburnum Viburnum ...
University of Illinois Extension
Japanese Spirea (Spiraea japonica) Kalm St. Johnswort (Hypericum kalmianum) Korean Rhododendron (Rhododendron mucronulatum) Koreanspice Viburnum (Viburnum carlesii) Lantanaphyllum Viburnum (Viburnum x rhytidophylloides) Late Lilac (Syringa villosa) Lemoine Deutzia (Deutzia x lemoine) Lemoine Mockorange (Philadelphus x lemoinei)