Plant Health Care Links
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Listed below are links to more information about specific insects and diseases found in our landscapes. Please notify us if you find a broken link. GDD = Growing Degree Days. Photos are previews and are linked to the full articles. Thank you! Enjoy.
Adelgids: Cooley Spruce Gall Adelgid – Adelges cooleyi egg hatch 308 GDD
Adelgids: Eastern Spruce Gall Adelgid – Adelges abietis egg hatch 308 GDD
Alder Leafminer – Kaliodenusa ulmi adult emergence 224 GDD
Allegheny Mound Ants in Kentucky | PDF
ANTHRACNOSE DISEASES OF TREES – Beech anthracnose symptoms can be confused with leaf scorch, a physiological disease associated with heat and drought. With anthracnose, the necrotic tissue expands from the inner portions of the leaf outward. With leaf scorch, the browning first appears along the leaf edges and …
Anthracnose of Shade Trees PPFS-OR-W-23
Anthracnose of Sycamore and Ash
Ants in Kentucky Landscapes & Gardens | PDF
Aphids; Garden Design - Aphids
Aphids, Beech Blight (Attack of the Boogie-Woogie Aphids)
Aphids, Oleander aphids on milkweed
Apple Scab disease on apple fruit trees– Ohioline – The Ohio State University, OhioLine- Scab of Apple, Apple Scab - The Morton Arboretum
Asian Giant Hornet Online Reporting Portal
Asian Lady Beetle- Purdue, Asian Lady Beetle Infestation of Structures | PDF
Asian Longhorned Beetle USDA APHIS Beetle Buster Website
Asian longhorned beetle – Anoplophora glabripennis first adult emergence 887 GDD
Asian longhorned beetle pheno forecast map
Bacterial Leaf Scorch UK, Bacterial leaf scorch Purdue
Bagworms, Bugdoc Bagworm fact sheet, Bagworms on Landscape Plants | PDF, Purdue: Bagworms Bagworm – Thyridopteryx ephemeraeformis egg hatch 630 GDD, Bagworm pheno forecast map
Black Spot of Rose PPFS-OR-W-10
Black Vine Weevil – Otiorhynchus sulcatus adult emergence 560 GDD
Borers in Trees and Shrubs | PDF
Borers: Banded Ash Clearwing Borer – Podosesia syringae adult emergence 2195 GDD
Borers: Bronze Birch Borer; Bronze Birch Borer – Agrilus anxius adult emergence 547GDD
Bronze birch borer pheno forecast map
Borers: Dogwood Borer – Synanthedon scitula adult emergence 830 GDD; University of Connecticut Dogwood Borer
Borers: Emerald Ash Borer – Agrilus planipennis adult emergence 550 GDD, Emerald Ash Borer (EAB) FAQs for Kentuckians | PDF, Emerald Ash Borer in Indiana
Borer: Greater Peach Tree Borer – Synanthedon exitiosa adult emergence 775 GDD
Borers, Lesser Peach Tree Borer – Synanthedon pictipes adult emergence 372 GDD
Borers, Lilac Borer – Podosesia syringae adult emergence 330 GDD, Lilac borer pheno forecast map
Borers: Maple Petiole Borers | PDF
Symptoms: A sudden drop of many sugar maple leaves in May - June can be due to injury by a small wasp larva that burrows in leaf petioles. These stems usually break at a darkened area near the leaf blade. Usually, infestations are limited to sugar maples and only about 15% to 20% of the leaves fall to the ground.
While spectacular, the leaf drop has little effect on the tree health. Buildups of scales or aphids, or drought stress can cause leaf loss but these typically occur later in the year.
Borers: Maple Shoot Borer | PDF
Borers: Pines and other needle bearing evergreens in landscapes
Borers: Rhododendron Borer – Agrilus planipennis adult emergence 815 GDD
Borers: Root Collar Borer, common on tulip trees
Borers That Attack Landscape Pines | PDF
Box Elder Bugs, Boxelder Bugs | PDF
Boxwood Blight: Boxwood blight, Purdue publication on boxwood blight, Purdue article on identification; University of Kentucky (UK) – Boxwood Blight
Boxwood Dieback (Colletotrichum theobromicola Delacr.)
Boxwood Leaf Miner, Boxwood Leafminer – Buxus sempervirens adult emergence 440 GDD
Boxwood Psyllid | PDF, Boxwood Psyllid – Psylla negudinis egg hatch 179 GDD
Boxwood Volutella Blight, University of Kentucky
Box Tree (Boxwood) Moth Confirmed in Southwest Ohio
Box Tree (Boxwood) Moth: Latest Observations
Box Tree Moth: What to Look for with Box Tree (Boxwood) Moth
Box Tree (Boxwood) Moth: New Detection, What to Look For, and Management
Chlorinated water and tree damage
Cicadas. Mt. St. Joseph University
Cicadas, Periodical Cicadas in Kentucky | PDF
Crown Gall PPFS-GEN-01
Crown gall on grape Video
Deep Roots–Planting With A Flare
Diagnostic challenges. Biotic vs. Abiotic – Distinguishing Disease Problems
Diagnostic Lab: C. Wayne Ellett Plant and Pest Diagnostic Clinic(CWEPPDC)
Diagnostic Lab: Research Associates Laboratory
Diagnostic Lab: Spectrum Analytic Inc.
Diagnostic Labs. Canker Sampling of Trees and Woody Ornamentals.
Diplodia Tip Blight of Pine (1.2 MB) PPFS-OR-W-21
Dogwood Diseases (1.2 MB) PPFS-OR-W-06
Dogwood Powdery Mildew: Signs and Symptoms
Downy mildew of grape Video
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Fire Blight of Apple Video
Fruit: BEGINNERS GUIDE: FRUIT TREE CARE – Mahoney’s …
Fruit, Homeowner’s Guide to Fungicides PPFS-GEN-07
Fruit, Midwest Fruit Pest Management Guide 2019-2020
Fruit, More small fruit publications
Fruit, More tree fruit publications
Fruit, Peach Leaf Curl and Plum Pockets
Fruit Spray Schedules for the Homeowner
Fruit, Stark Brothers Pest and Disease Control resources
Fruit, Pest Management Guide ID-232
Fruit suppressant, flower sterillant (crabapples, sweet gum balls, etc)
Fruit Trees, Stark Brothers Growing Guide resources
Fungal conks: Black locust- Phellinus robiniae
Fungi: Armillaria Mellea, Fruiting Bodies of Oak Root Fungus
Fungi: Armillaria Root Rot
Fungi: Armillaria Root Rot–A threat to stressed landscape trees
Fungi: Brittle cinder fungus root and butt rot Kretzschmaria duesta
Fungi: Burnt Crust or Brittle Cinder Fungus
Fungi: Ganoderma Applanatum Fruiting Bodies (Conks) of the Wood-Decaying Fungus
Fungi: Ganoderma Lucidum Fruiting Bodies of Varnish Fungus Rot
174. Fungi
176. Fungi:
Fungi: Wood Decay Fungi Diagnostic Reference
Fungi: Wood Decay Fungi in Landscape Trees
Fungicides for Management of Landscape Woody Ornamental Diseases PPFS-OR-W-14
Fungicides, Homeowner’s Guide to PPFS-GEN-07
Galls: Cypress Twig
Growing degree days and Phenology: Phenology Forecasts
Growing degree days and Phenology: Timing Controls of Landscape Pests Using Flowering Plants as Indicators | PDF
Grubs, Insecticides for Control of White Grubs in Kentucky Turfgrass | PDF, Controlling White Grubs | PDF
Guignardia Blotch of Horse Chestnut and Buckeye, Guignardia Leaf Blotch Running Rampant
Hemlock woolly adelgid pheno forecast map
Herbicide Damage: Diagnosing and Preventing Herbicide Injury to Trees>>>
Herbicide Injury on Garden and Landscape Plants
Holly Leafminer – Phytomyza ilicis adult emergence 375 GDD
Honeylocust Plant Bug – Diaphoncoris chlorionis egg hatch 230 GDD
Honeylocust Spider Mite – Platytetranychus multidigituli egg hatch 227 GDD
Houseplant Insect Control | PDF
Insecticides, General Use Insecticides for Home Gardening | PDF
Inkberry Leafminer – Liriomyza sativae adult emergence 150 GDD
Iron Deficiency of Woody Plants ID-84
Journal of Integrated Pest Management
Lace Bugs & Plant Bugs | PDF, Azalea Lace Bug – Stephanitis pyrioides egg hatch 206 GDD
Ladybugs | Entomology; Ladybuglady.com
Large Crabgrass – first seedling emergence 211
Leaf-footed bugs (family Coreidae)
Locust Leaf Miner, Locust Leafminer – Odontota dorsalis adult emergence 437 GDD
Maple decline. Calcium implicated.
Maple Decline Arbor Doctor summary: The complex conundrum of sugar maple decline
Maple decline. Earthworms at the Root of Sugar Maple Decline
Needle drop: A natural phenomenon in conifers in fall
Needle drop: Seasonal needle drop article in the BYGL
Oak Wilt in the Northeastern and Midwestern States
Oak Wilt info from Purdue Univ
Needle drop: Seasonal needle drop article in the BYGL
Oak Wilt in the Northeastern and Midwestern States
Oak Wilt info from Purdue Univ.
Pesticide Application Guide, Virginia Tech Nursery crops Pest Management Guide
Roses ID-118
Rose Rosette Disease PPFS-OR-W-16, Sustainable Roses
Rust diseases ; Junipers Garnished with Tangerine Tentacles and Orange Goo
Rust: Orange “Dust” from Callery Pears
Sawfly: Chestnut
Sawfly: European Pine Sawfly, Pine Sawflies | PDF, European Pine Sawfly, Neodiprion sertifer
Scale: Armored Scale Identification and Management on Ornamental Plants, Armored Scale
Scale: Azalea Bark Scale – Eriococcus azaleae egg hatch 957 GDD
Scale: Calico Scale, Calico Scale – Hemiptera sternorrhyncha egg hatch 748 GDD
Scale: Pine Needle Scale – Chionaspis pinifoliae egg hatch – 1st generation 305 GDD; Pine needle scale pheno forecast map
Scale: Spruce Bud Scale BYGL; Spruce Budscale – Physokermes piceae egg hatch 894 GDD
Scale: Striped Pine Scale – Toumeyella pini egg hatch 783 GDD
Scale: Tuliptree Scale | PDF
Scale: Winged Euonymus Scale – Unaspis euonymii egg hatch 892 GDD
Shoestring Root Rot – A Cause of Tree and Shrub Decline PPFS-OR-W-05
Slime Mold, Lichens, & Sooty Mold Problems on Plants PPFS-GEN-06
Smooth Crabgrass – first seedling emergence 155 GDD
Spider, Brown Recluse Spider | PDF
Spider Chart: Common Kentucky Spiders
Spiders Found Around Homes & Buildings | PDF
Spiders, Garden Spinder Orb Weavers
Spotted Lanternfly; /check-out-the-spotted-lanternfly-factsheet/
Spotted Lanternfly treatment options New York state list
Spruce decline: The decline of the Colorado and blue spruce in midwest landscapes
Stress & Decline in Woody Plants (9 MB) ID-50
Suckers: Stopping sucker sprouts on trees
Sunscald and Sunburn on trees, My Japanese Maple Tree's Bark Is Coming Off with Bugs in the Branches: What Is Wrong?
Thousand Cankers Disease in Walnut, sample submission protocol PPFS-OR-W-15
Ticks & Disease | PDF, Ticks (Ohioline)
Topping Is Hazardous to Your Tree’s Health ID-55
Transplant Shock: Disease or Cultural Problem? (1.7 MB) PPFS-OR-W-19
Tree Health Website (University of Kentucky)
Tree Health Assessment Checklist
Tree Pathologist Stephanie Adams
Tree roots: Surface Root Syndrome
Tree Wounds—Invitations to Wood Decay Fungi (3 MB) PPFS-OR-W-01
Twig Blights of Juniper PPFS-OR-W-11
Varroa Mites Infesting Honey Bee Colonies | PDF
Vertical mulching of trees, how to.
Verticillium Wilt of Woody Plants PPFS-OR-W-18
Viburnum Leaf Beetle – Pyrrhalta viburni first egg hatch 210 GDD
Volutella Blight of pachysandra; Volutella leaf blight and stem canker of pachysandra
Walnut Juglone Toxicity and Tolerant Plants
Walnuts and Juglone Toxicity, maybe not?
Wasps, Yellow Jackets, Baldfaced Hornets
“Wet Feet” of Ornamentals PPFS-OR-W-04
When White Pines Turn Brown (1 MB) PPFS-OR-W-22
Willow black canker (Glomerella spp.)
Willow Leaf Beetle – Chrysomela versicolor adult emergence 274 GDD
Woody Plant Disease Management Guide for Nurseries and Landscapes ID-88
Virtual Arboretum
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Trees Are Good
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