284 THE COMPLETE GARDEN 



because they are all treated in the same way when spraying is re- 

 sorted to; namely, by a poison or a contact insecticide. 



Alder (powdery mildew, borers, leaf roller, caterpillars, maple scale). 



Apple (canker, aphids, caterpillars, scales, and bark louse). 



Arborvitae (bagworm). 



Ash (trunk rot, canker, leaf spot, borer, caterpillars, and scales). 



Aster (wilt and blister beetle). 



Azalea (leaf spot and caterpillar). 



Barberry (rust, plant louse, and caterpillar). 



Bay berry (caterpillar). 



Beech (leaf diseases, anthracnose, mildew on leaves, maple scale, and caterpillars). 



Birch (anthracnose, heart rot, canker, borer, and caterpillars). 



Bitter-sweet, (evonymus scale). 



Box Elder (canker, scales, and caterpillars). 



Boston Ivy (caterpillars). 



Buckeye (scales, bark louse, and caterpillars). 



Catalpa (leaf blight, powdery mildew, and caterpillars). 



Cherry (black knot, scales, aphis, leaf spot, mildew, and caterpillars). 



Chestnut (anthracnose, bark disease, weevil, and caterpillars). 



Chrysanthemum (leaf spot). 



Columbine (borers). 



Daphne (magnolia scale). 



Dogwood (San Jose scale, oyster shell scale, dogwood scale, and bark louse). 



Elm (leaf diseases, leaf beetle, canker, scale, leaf gall, and caterpillars). 



Englemann's spruce (red spider). 



English Ivy (leaf blight). 



Evonymus (evonymus scale, and cottony maple scale). 



Fir (saw fly, timber beetle, borer, and caterpillars). 



Hackberry (scale and caterpillars). 



Hazel (caterpillars). 



Hickory (leaf spot, borers, shuck worm, tussock moth caterpillar, bark beetle, and 



canker worm). 

 Hollyhock (anthracnose and rust). 

 Hornbeam (caterpillars). 



Horse-chestnut (leaf blight, rust, tussock moth, bag worm, scales, and bark lice). 

 Hydrangea (leaf blight and rust). 

 Iris (bulb spot, root rot, and leaf blight). 

 Juniper (cedar rust, red spider, and caterpillars). 

 Larch (canker, saw fly, and tussock moth). - 

 Lilac (powdery mildew, San Jose scale, bark lice, and caterpillars). 

 Linden (borers, leaf beetle, caterpillars, scale, and red spider). 

 Locust (heart rot, borers, leaf beetle, maple scale, and caterpillars). 

 Magnolia (magnolia scale). 



Maple (anthracnose, tip burn, sun scald, borers, caterpillars, scale, and twig pruner). 

 Mulberry (bacterial disease, cottony maple scale). 



