2024 Trees and Shrubs Table of Contents: 2.7 Insects and Mites Destructive to Woody Ornamentals

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2.7 Insects and Mites Destructive to Woody Ornamentals

2.7 Insects and Mites Destructive to Woody Ornamentals

The following table lists some of the common or key insect and mite pests of woody ornamentals. Look under the host plant involved and find the correct common name of the pest. Check Tables 2.9.1 and 2.10.1 for monitoring and
management information. Numbers following the insect name indicate where additional information can be found in Insects That Feed on Trees and Shrubs, second edition. Illustrations (plate numbers) are in boldface type. Book is available from Cornell University Press, 800-848-6224 (U.S. & Canada) or at www.cornellpress.cornell.edu.

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Table 2.7.1. Host plant guide to insect names: an aid to diagnosis and identification
Plant	Pest	Page No.	Plate No.
Andromeda	azalea bark scale	336	160
	azalea whitefly	318	151
	lace bugs	424	204
Apple (flowering crab)	aphids	296, 300, 316	150
	cankerworms	142, 44	63, 64
	leafhoppers	412-418	216-218
	leafrollers	172	100, 101
	oystershell scale	370	177
	redbanded leafroller	214
	roundheaded appletree borer	278	131
Arborvitae	arborvitae leafminer	142	14
	arborvitae weevil	240	244
	bagworm	176	80
	black vine weevil	240	112, 113
	Fletcher scale	98	42
	gypsy moth	138, 140	61, 62
	hemlock looper	24
	juniper scale	106	46
	spruce spider mite	118	52, 53
Ash	blackheaded ash sawfly	134	59
	lace bugs	426
	lilac/ash borer	260	122
	oystershell scale	370	177
Azalea	azalea bark scale	336	160
	azalea leafminer	202	93
	azalea whitefly	318	151
	black vine weevil	240	112, 113
	fruittree leafroller (azalea leaftier)	172
	lace bugs	424	204
	rhododendron borer	258,	121
	rhododendron stem borer	288
	southern red mite	475	229
	twobanded Japanese weevil	244	114
Barberry	twobanded Japanese weevil	244	114
Beech	aphids	296, 310	140, 147
	cankerworms	142-144	63, 64
	woolly beech aphid	296	140
Birch (white, gray, yellow, and European white)	aphids	296, 310	140, 147
Birch (white, gray, yellow, and European white)	birch leafminer	184	84
	birch skeletonizer	220
	bronze birch borer	272	128
	European hornet	494	238
	potato leafhopper	414	199
Bittersweet	euonymus scale	388	186
Boxwood	boxwood leafminer	204	94
	boxwood mite	475	229
	boxwood psyllid	290	137
Butternut	butternut gall mite	488	235
	walnut caterpillar	150	67
Cedar	arborvitae weevil	240, 244	244
	bagworm	176	80
	spruce spider mite	118	52, 53
Cherry (Wild) and Chokecherry	eastern tent caterpillar	168	76
Cherry (Wild) and Chokecherry	fruittree leafroller	172
Cotoneaster	lace bugs	426
	oystershell scale	370	177
Deutzia	twobanded Japanese weevil	244	114
Dogwood	cottony maple leaf scale	342-346	163, 165
	dogwood borer	262	123
	dogwood sawfly	126	55
Douglas-Fir	Cooley spruce gall adelgid	112	49, 76
	Douglas-fir needle midge	44	15
	spruce spider mite	118	52, 53
Elm	bark beetles	246-248	115, 116
	cankerworms	142-144	63, 64
	clover mite	472
	elm case bearers	186	85
	elm cockscomb gall aphid	464	224
	elm leaf beetle	220	103
	elm leafminer	186	85
	European elm scale	368	176
	European red mite	472	228
	forest tent caterpillar	168	76
	gypsy moth	138-140	61, 62
	lecanium scales	354, 364, 169	174
	linden looper	144	64
	twig pruner	264	124
	twospotted spider mite	476
	woolly elm aphid	306, 316	145
Euonymus	black vine weevil	240	112, 113
	euonymus scale	388	186
	twobanded Japanese weevil	244	114
Fir	balsam gall midge	116	51
	balsam twig aphid	80	33
	balsam woolly adelgid	74	30
	spruce budworm	28	7
Flowering Fruits (cherry, peach, almond)	aphids	292, 300, 308
Flowering Fruits (cherry, peach, almond)	cankerworms	142, 144	63, 64
	European red mite	472	228
	fall webworm	166	75
	Japanese beetle	236	110
	leafrollers	172, 216-218	100, 101
	lecanium scales	354, 364	169, 174
	peachtree borers	258	121
	roundheaded appletree borer	278	131
	twospotted spider mite	476
	white prunicola scale	392	188
Hackberry	hackberry psylla	450, 452	217, 218
	twig pruner	264	124
Hawthorn	apple blotch leafminer	196
	cherry and hawthorn leafminer	188	86
	lace bugs	426	205
	pear sawfly	130	57
Hemlock	elongate hemlock scale	104	45
	hemlock looper	24
	hemlock rust mite	122	54
	hemlock scale	102	44
	spruce budworm	28	7
	spruce spider mite	118	51, 53
Hickory	hickory leaf stem gall phylloxera	460	222
	twig pruner	264	124
	walnut caterpillar	150	67
Holly	cottony scales	342-346	163, 164
	holly leafminers	206-208	95
	southern red mite	475	229
	twig pruner	264	124
Honeylocust	honeylocust plant bug	404	194
	honeylocust podgall midge	466	225
	honeylocust spider mite	474	228
Honeysuckle	clover mite	472
	honeysuckle aphid	314	149
Juniper	arborvitae leafminer	42	14
	arborvitae weevil	240, 244
	bagworm	176	80
	juniper scale	106	46
	juniper webworm	30	8
	spruce spider mite	118	52, 53
Larch	larch casebearer	36	11
	larch sawfly	18	1
	spruce budworm	28	7
	woolly larch adelgid	78	32
Lilac	European hornet	494	238
	lilac/ash borer	260	122
	lilac leafminer	196	90
	oystershell scale	370	177
	twobanded Japanese weevil	244	114
	white prunicola scale	392	188
Linden	aphids	302, 310	110
	cankerworms	142, 144	63, 64
	gypsy moth	138, 140	61, 62
	Japanese beetle	236	110
	lace bugs	426	205
	linden looper	144	64
	twospotted spider mite	476
Locust, Black	locust borer	274	129
	locust leafminer	190	87
London Plane Tree	American plum borer	252	118
	lecanium scales	354, 364	169, 174
	sycamore lace bug	428	206
	sycamore plant bug	400	192
Magnolia	magnolia scale	354	169
	sassafras weevil	210	97
Maples	aphids	304	144
	cottony maple leaf scale	342-346	163, 165
	cottony maple scale	340	162
	greenstriped mapleworm	156
	gypsy moth	138-140	61, 62
	lecanium scales	364	174
	linden looper	144	164
	maple gall mite	482	232
	maple petiole borer	200	92
	potato leafhopper	414	199
	sugar maple borer	276	130
	tent caterpillar	168	76
	twig pruner	264	124
Mountain Ash	European red mite	472	228
	lace bugs	426	205
	mountain ash sawfly	128	56
	pear sawfly	130	57
Mountain Laurel	mulberry whitefly	324
	rhododendron borer	258	121
	rhododendron stem borer	288
Oak	aphids	310
	cankerworms	142, 144	63, 64
	golden oak scale	352	168
	gypsy moth	138-140	61, 62
	kermes oak scales	364-366	174
	lace bugs	426
	lecanium scales	364	174
	linden looper	144	64
	oak galls	440-448	212-216
	oak leafminers	192, 196	88
	oak leaftier	214	99
	oak skeletonizer	20	102
	oak spider mite	475	228
	orangestriped oakworm	156	70
	tent caterpillars	168	56
	twig pruner	264	124
Pachysandra	euonymus scale	388	186
Pine	aphids	84	35
	black turpentine beetle	62	24
	European pine shoot moth	48	17, 18
	gypsy moth	138-140	61, 62
	Nantucket pine tip moth	48, 50	17, 18
	pales weevil	56	21
	pine bark adelgid	76	31
	pine eriophyid mites	122
	pine needleminer	38, 40	12, 13
	pine needle scale	108	47
	pine root collar weevil	56
	pine sawflies	16-20	1-3
	pine spittlebug	86	36
	pine tortoise scale	96	41
	pine tube moth	46	16
	pine webworm	22	4
	pitch twig moth	72
	spruce budworm	28	7
	spruce spider mite	118	52, 53
	white pine aphid	84
	white pine weevil	54	20
	Zimmerman pine moth	48, 49
Poplar	cottonwood leaf beetle	226	105
	satin moth	158	71
Privet	lilac leafminer	196	90
	privet rust mite	480	231
	twobanded Japanese weevil	244	114
	white prunicola scale	392	188
Rhododendron	azalea bark scale	336	160
	azalea whitefly	318	151
	black vine weevil	240	112, 113
	European hornet	494	238
	lace bugs	404	204
	rhododendron borer	258	121
	rhododendron gall midge	470	227
	rhododendron stem borer	288
	twobanded Japanese weevil	244	114
Rose	aphids	300, 308	146
	Japanese beetle	236	110
	leafhoppers	412	198
	rose chafer	236	110
	rose slug	132	58
	twospotted spider mite	476
Sassafras	sassafras weevil	210	97
Spruce	balsam twig aphid	80	33
	black vine weevil	240	112, 113
	Cooley spruce gall adelgid	76, 112	49
	eastern spruce gall adelgid	114	50
	pine needle scale	108	47
	pine sawflies	16-20	1-3
	spruce bud scale	96	41
	spruce budworm	28	7
	spruce needleminers	32	9
	spruce spider mite	118	52, 53
	white pine weevil	54	20
	woolly larch adelgid	78	32
Taxus	black vine weevil	240	112, 113
	cottony taxus scale	344	164
	Fletcher scale	98	42
	taxus bud mite	478	230
	taxus mealybug	88	37
Tuliptree	tuliptree aphid	292	138
	tuliptree scale	362	173
Viburnum	snowball aphid	300	142
	viburnum leaf beetle	224	104
Walnut	walnut lacebug	426	205
	walnut pouch gall mite	486	234
	walnut caterpillar	150	67
Willow	aphids	310	147
	imported willow leaf beetle	228	106
	oystershell scale	370	177
	poplar-and-willow borer	268	126
	willow flea weevil	190	87
	willow twig aphid	228	106

2.6 Insecticides

2.8 Pest Management Timing