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.
4. Adelgids: Cooley Spruce Gall Adelgid – Adelges cooleyi egg hatch 308 GDD
5. Adelgids: Eastern Spruce Gall Adelgid – Adelges abietis egg hatch 308 GDD
6. Alder Leafminer – Kaliodenusa ulmi adult emergence 224 GDD
7. Allegheny Mound Ants in Kentucky | PDF
9. 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 …
13. Anthracnose of Sycamore and Ash
14. Antlions
15. Ants in Kentucky Landscapes & Gardens | PDF
16. Aphids; Garden Design - Aphids
17. Aphids, Beech Blight (Attack of the Boogie-Woogie Aphids)
19. Aphids, Oleander aphids on milkweed
20. Apple Scab disease on apple fruit trees– Ohioline – The Ohio State University, OhioLine- Scab of Apple, Apple Scab - The Morton Arboretum
41. Black Spot of Rose PPFS-OR-W-10
42. Black Vine Weevil – Otiorhynchus sulcatus adult emergence 560 GDD
43. Borers in Trees and Shrubs | PDF
44. Borers: Banded Ash Clearwing Borer – Podosesia syringae adult emergence 2195 GDD
45. Borers: Bronze Birch Borer; Bronze Birch Borer – Agrilus anxius adult emergence 547GDD
47. Borers: Dogwood Borer – Synanthedon scitula adult emergence 830 GDD; University of Connecticut Dogwood Borer
48. Borers: Emerald Ash Borer – Agrilus planipennis adult emergence 550 GDD, Emerald Ash Borer (EAB) FAQs for Kentuckians | PDF, Emerald Ash Borer in Indiana
49. Borer: Greater Peach Tree Borer – Synanthedon exitiosa adult emergence 775 GDD
50. Borers, Lesser Peach Tree Borer – Synanthedon pictipes adult emergence 372 GDD
51. Borers, Lilac Borer – Podosesia syringae adult emergence 330 GDD, Lilac borer pheno forecast map
52. 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.
63. Boxwood Dieback (Colletotrichum theobromicola Delacr.)
64. Boxwood Leaf Miner, Boxwood Leafminer – Buxus sempervirens adult emergence 440 GDD
65. Boxwood Psyllid | PDF, Boxwood Psyllid – Psylla negudinis egg hatch 179 GDD
66. Boxwood Volutella Blight, University of Kentucky
67. Box Tree (Boxwood) Moth Confirmed in Southwest Ohio
68. Box Tree (Boxwood) Moth: Latest Observations
69. Box Tree Moth: What to Look for with Box Tree (Boxwood) Moth
70. Box Tree (Boxwood) Moth: New Detection, What to Look For, and Management
71. Bronze Birch Borer- Purdue
81. Cankers: Nectria Canker and Dieback
83. Cankerworms | PDF
84. Carpenter Ants | PDF
85. Carpenter Bees | PDF
86. Caterpillars: Bagworms, Eastern Tent, Fall Webworms, Gypsy Moth, Wooly Bears, Stinging Caterpillars | PDF
88. Chestnut Blight
94. Cicadas, Periodical Cicadas in Kentucky | PDF
95. Cicada Killer Wasp | PDF
96. Clover Mites
98. Crown Gall PPFS-GEN-01
99. Crown gall on grape Video
100. Cucumber Beetles
101. Cypress Twig Galls
105. Diagnostic Lab: Research Associates Laboratory
106. Diagnostic Lab: Spectrum Analytic Inc.
107. Diagnostic Labs. Canker Sampling of Trees and Woody Ornamentals.
108. Diplodia Tip Blight of Pine (1.2 MB) PPFS-OR-W-21
116. Dogwood anthracnose
117. Dogwood Diseases (1.2 MB) PPFS-OR-W-06
119. Dormant Oils
120. Downy mildew of grape Video
121. Drought care
125. Dutch Elm Disease
126. Earthworms: Thatch-busters | PDF
133. Elm Yellows | BYGL
141. European Hornet in Kentucky | PDF
142. Exotic Ambrosia Beetle – Xylosandrus germanus first adult emergence 136 GDD
143. Fall needle drop: A natural phenomenon in conifers
144. Fall Webworm BYGL, Fall webworm- Purdue, Fall Webworm – Hyphantria cunea egg hatch 867 GDD; BYGL Spectacular Fall Webworm Nests
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147. Fire Blight of Apple Video
148. Frass
149. Fruit: BEGINNERS GUIDE: FRUIT TREE CARE – Mahoney’s …
150.
151. Fruit, Homeowner’s Guide to Fungicides PPFS-GEN-07
152. Fruit, Midwest Fruit Pest Management Guide 2019-2020
153. Fruit, More small fruit publications
154. Fruit, More tree fruit publications
156. Fruit, Peach Leaf Curl and Plum Pockets
157. Fruit Spray Schedules for the Homeowner
158. Fruit, Stark Brothers Pest and Disease Control resources
159. Fruit, Pest Management Guide ID-232
160. Fruit suppressant, flower sterillant (crabapples, sweet gum balls, etc)
163. Fruit Trees, Stark Brothers Growing Guide resources
164. Fungal conks: Black locust- Phellinus robiniae
165. Fungi: Armillaria Mellea, Fruiting Bodies of Oak Root Fungus
166. Fungi: Armillaria Root Rot
167. Fungi: Armillaria Root Rot–A threat to stressed landscape trees
168. Fungi: Brittle cinder fungus root and butt rot Kretzschmaria duesta
169. Fungi: Burnt Crust or Brittle Cinder Fungus
170. Fungi: Chicken of the Woods
171. Fungi: Ganoderma Applanatum Fruiting Bodies (Conks) of the Wood-Decaying Fungus
172. Fungi: Ganoderma Lucidum Fruiting Bodies of Varnish Fungus Rot
174. Fungi
176. Fungi:
177. Fungi: Wood Decay Fungi Diagnostic Reference
178. Fungi: Wood Decay Fungi in Landscape Trees
179. Fungicides for Management of Landscape Woody Ornamental Diseases PPFS-OR-W-14
180. Fungicides, Homeowner’s Guide to PPFS-GEN-07
181. Galls: Cypress Twig
189. Girdling Roots
191.
192. Graft failure
194. Growing degree days and Phenology: Phenology Forecasts
195. Growing degree days and Phenology: Timing Controls of Landscape Pests Using Flowering Plants as Indicators | PDF
195. Grubs, Insecticides for Control of White Grubs in Kentucky Turfgrass | PDF, Controlling White Grubs | PDF
197. Guignardia Blotch of Horse Chestnut and Buckeye, Guignardia Leaf Blotch Running Rampant
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205.
206. Hemlock woolly adelgid pheno forecast map
207. Herbicide Damage
208. Herbicide Damage: Diagnosing and Preventing Herbicide Injury to Trees>>>
209. Herbicide Injury on Garden and Landscape Plants
210. Holly Leafminer – Phytomyza ilicis adult emergence 375 GDD
211. Honeydew
212. Honeylocust Plant Bug – Diaphoncoris chlorionis egg hatch 230 GDD
213. Honeylocust Spider Mite – Platytetranychus multidigituli egg hatch 227 GDD
214. Houseplant Insect Control | PDF
215. Insecticides, General Use Insecticides for Home Gardening | PDF
216. Inkberry Leafminer – Liriomyza sativae adult emergence 150 GDD
217. Iron Deficiency of Woody Plants ID-84
218. Journal of Integrated Pest Management
219. Lace Bugs & Plant Bugs | PDF, Azalea Lace Bug – Stephanitis pyrioides egg hatch 206 GDD
220. Ladybugs | Entomology; Ladybuglady.com
221. Larch Casebearer: 128 GDD
222. Large Crabgrass – first seedling emergence 211
223. Laurel Wilt
224. Leaf-footed bugs (family Coreidae)
225. Leaf Roller: Basswood, Redbud
226. Leaf scorch
227. Leaf Scorch and Winter Drying of Woody Plants PPFS-OR-W-17
231. Maple decline. Calcium implicated.
232. Maple Decline Arbor Doctor summary: The complex conundrum of sugar maple decline
233. Maple decline. Earthworms at the Root of Sugar Maple Decline
234. Maple Leaf Blister
235. Maples: Heavy Maple Seed Production = Slow Leaf Development
247. MushroomExpert.com
265. Pine Sawfly
266. Pines, Common Sap Feeding Pine Insects | PDF
267. Pines: Diplodia tip blight | The Morton Arboretum
284. Roses ID-118
285. Rose Rosette Disease PPFS-OR-W-16, Sustainable Roses
286. Rose slug (sawfly)
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310. Scale: Obscure scale | PDF
311. Scale: Oystershell Scale | PDF, Oystershell Scale – Lepidosaphes ulmi egg hatch 497 GDD
312. Scale: Pine Needle Scale – Chionaspis pinifoliae egg hatch – 1st generation 305 GDD; Pine needle scale pheno forecast map
313. Scale: Spruce Bud Scale BYGL; Spruce Budscale – Physokermes piceae egg hatch 894 GDD
314. Scale: Striped Pine Scale – Toumeyella pini egg hatch 783 GDD
315. Scale: Taxus Scale | PDF
316. Scale: Terapin Scale
317. Scale: Tuliptree Scale | PDF
318. Scale: Walnut Scale | PDF
320. Scale: White Prunicola Scale
321. Scale: Winged Euonymus Scale – Unaspis euonymii egg hatch 892 GDD
323. Shoestring Root Rot – A Cause of Tree and Shrub Decline PPFS-OR-W-05
324. Slime Mold, Lichens, & Sooty Mold Problems on Plants PPFS-GEN-06
326. Smooth Crabgrass – first seedling emergence 155 GDD
327. Southern Pine Beetle | PDF
328. Sowbugs & Pillbugs | PDF
330. Spider, Brown Recluse Spider | PDF
331. Spider Chart: Common Kentucky Spiders
332. Spiders Found Around Homes & Buildings | PDF
333. Spiders, Garden Spinder Orb Weavers
334. Spotted Lanternfly; /check-out-the-spotted-lanternfly-factsheet/
335. Spotted Lanternfly treatment options New York state list
336. Springtails | PDF
337. Spruce decline: The decline of the Colorado and blue spruce in midwest landscapes
338. Squirrels, bark stripping
339. Stem Girdling Root Removal
340. Stress & Decline in Woody Plants (9 MB) ID-50
341. Suckers: Stopping sucker sprouts on trees
342. Sudden Oak Death
343. Sunscald and Sunburn on trees, My Japanese Maple Tree's Bark Is Coming Off with Bugs in the Branches: What Is Wrong?
347. Tent caterpillars | PDF
348. Thousand Cankers Disease in Walnut, sample submission protocol PPFS-OR-W-15
349. Ticks & Disease | PDF, Ticks (Ohioline)
350. Topping Is Hazardous to Your Tree’s Health ID-55
351. Transplant Shock: Disease or Cultural Problem? (1.7 MB) PPFS-OR-W-19
352. Tree Health Website (University of Kentucky)
353. Tree Health Assessment Checklist
354. Tree Pathologist Stephanie Adams
355. Tree roots: Surface Root Syndrome
356. Tree Wounds—Invitations to Wood Decay Fungi (3 MB) PPFS-OR-W-01
357. Tubakia Leaf Spot on oaks.
358. Twig Blights of Juniper PPFS-OR-W-11
361. Varroa Mites Infesting Honey Bee Colonies | PDF
362. Velvet Ants | PDF
363. Vertical mulching of trees, how to.
364. Verticillium Wilt of Woody Plants PPFS-OR-W-18
365. Viburnum Leaf Beetle – Pyrrhalta viburni first egg hatch 210 GDD
366. Viruses
367. Volutella Blight of pachysandra; Volutella leaf blight and stem canker of pachysandra
368. Walnut Juglone Toxicity and Tolerant Plants
369. Walnuts and Juglone Toxicity, maybe not?
370. Wasps, Yellow Jackets, Baldfaced Hornets
371. “Wet Feet” of Ornamentals PPFS-OR-W-04
372. Wheel Bugs
373. White Nose Syndrome of bats
374. When White Pines Turn Brown (1 MB) PPFS-OR-W-22
376. White pine decline
377. White Pine Weevil: 84 GDD
378. Willow black canker (Glomerella spp.)
379. Willow Leaf Beetle – Chrysomela versicolor adult emergence 274 GDD
383. Woody Plant Disease Management Guide for Nurseries and Landscapes ID-88
385. Yellowjackets | PDF
386. Yellow Poplar Weevil | PDF
387. Zimmerman pine moth
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