Carpenterworm 59 



Cottonwood Leaf Beetle ... 60 



Poplar Tent Maker 60 



Oystershell Scale 60 



Privet 60 



Privet Thrips 60 



Redbud 62 



Oystershell Scale 62 



Two-Spotted Spider Mite . . 62 



Spirea 62 



Spirea Aphid 62 



Spruce 62 



Spruce Spider Mite 62 



Cooley Spruce Gall Aphid . . 64 

 Eastern Spruce Gall Aphid . . 64 



Spruce Bud Scale 64 



Spruce Budworm 65 



Pine Needle Scale 65 



Sycamore 65 



Sycamore Lace Bug .... 65 



Bagworm 65 



Borers 66 



Tuliptree 66 



Tuliptree Scale 66 



Tuliptree Aphid 66 



Walnut 67 



Walnut Caterpillar 67 



Black Walnut Curculio ... 68 



Willow 68 



Willow Aphid 68 



Bagworm 68 



Borers 68 



Oystershell Scale 69 



Yew (Taxus) 69 



Black Vine Weevil 69 



Fletcher Scale 71 



Termites 71 



Taxus Mealybug 73 



Potential Insect Enemies ... 73 



Japanese Beetle 73 



Gypsy Moth 75 



Brown-Tail Moth 75 



About Insecticides 76 



About Spray Equipment 



And Its Use 78 



Index 83 



Spray Preparation Tables ... 89 

 Control Measures 90 



The kodachrome for the cover and most of the photographs for this 

 circular were taken by William E. Clark of the Illinois Natural History Sur- 

 vey. Photographs from outside agencies are credited to those agencies. 



TO USERS OF THIS CIRCULAR 



Control measures referred to in this circular are listed on 

 pages 90, 91, and 92. 



Printed by Authority State of Illinois Ch. 127 IRS, Par. 58.21 

 (19018— 3M— 10-65) a^g^a 



