P&PDL Picture of the Week Index - Plant & Pest Diagnostic Laboratory, Purdue University

White Clover (30 June 2008)

Ear Size Determination in Corn (23 June 2008)

Peach Leaf Curl and Oak Leaf Blister: Taphrina strikes again (16 June 2008)

Carpenter Bees are Back at Work (9 June 2008)

Winter Burn of Evergreens (2 June 2008)

Sycamore Anthracnose (26 May 2008)

Arborvitae Shoot Tips Turning Brown (19 May 2008)

It’s May, so it's Mayapple Season (12 May 2008)

Clover Mites in the Home (5 May 2008)

Annual bluegrass (Poa annua) is in bloom and setting seed (28 April 2008)

Corn Germination (21 April 2008)

Think petunias are only useful as bedding plants? (14 April 2008)

Harbingers Of Spring (7 April 2008)

Do you have Wild Onion in your lawn? Or possibly the Star-of-Bethlehem?? (31 March 2008)

Sleep Tight, Don't Let the Bedbugs Bite! (24 March 2008)

The Succulent Purslane (17 March 2008)

Western Flower Thrips and Fungus Gnats (10 March 2008)

Trees vs. Turf: Turf is the loser in heavily shaded areas (3 March 2008)

Leaf tip burn on Oriental lilies (25 February 2008)

Corny Hall of Fame: "Indian Totem" Frog (25 February 2008)

Twisted Tale: Tree and shrub installation: “The roots of trees and shrubs should be disturbed as little as possible at installation.” (18 February 2008)

Avoiding the Easter Lily Production “Blues” (11 February 2008)

Eggplant Shothole Damage (4 February 2007)

Winter Annuals and the Nematode (Soybean Cyst Nematode) (28 January 2008)

Powdery Mildew on Houseplants (21 January 2008)

German cockroach photos are rare (14 January 2008)

New Lawns with Clumpy Perennial Ryegrass (7 January 2008)

Poinsettia Plant – Is it Poisonous to Pets? (21 December 2007)

Frosted Volunteer Corn (10 December 2007)

A pretty fungus among us (3 December 2007)

Fall Sanitation is Important to Reduce the Amount of Disease Carryover (19 November 2007)

"Pea Sticks" (12 November 2007)

Fall Weed Management, is it Right for You? (5 November 2007)

Chlorotic and Bleached Stems and Leaves in Poinsettia (29 October 2007)

Glow in the Dark Worms (22 October 2007)

Now is Prime Time for Broadleaf Weed Applications in Many Turf Areas (15 October 2007)

Symptomology of Arrested Ear Development in Corn (8 October 2007)

Black Rot (1 October 2007)

Bark Splitting (24 September 2007)

More Fascinating Fasciation! (10-17 September 2007)

Cut-leaved Teasel (3 September 2007)

Good luck or bad luck? (27 August 2007)

Peony leaf blotch (20 August 2007)

Grassy weeds becoming obvious in dormant turf areas (13 August 2007)

"Headless" Corn Plants (6 August 2007)

Green Buildings, I Guess! (30 July 2007)

Cypress Twig Gall Midge (16 July 2007)

Lettuce Bolting (9 July 2007)

Asiatic Dayflower Pretty but Hard to Control (2 July 2007)

Tender Plants Injured by 'Sour' or 'Toxic' Mulch (25 June 2007)

Lady Beetles Are Out! The Benefits of the Asian Lady Beetle (18 June 2007)

Winter Annuals are Beginning to Dieback (11 June 2007)

Purple Corn Plants (4 June 2007)

Katydid Eggs (28 May 2007)

Lawns turning brown overnight? (21 May 2007)

What to do about yellow fields (14 May 2007)

Three Strike Rule? (7 May 2007)

Purslane speedwell (Veronica peregrina) (30 April 2007)

Rust Galls on Juniperus virginiana—the three amigos (23 April 2007)

Spring Flower Shows (16 April 2007)

Ground Ivy (Creeping Charlie) is going vertical and flowering (9 April 2007)

Leafing Out of Corn Underground (2 April 2007)

Tree Topping - Don't Do It! (26 March 2007)

Chlorosis of pine trees (12 March 2007)

Tuliptrees (5 March 2007)

Artillery Fungi “Pepper” Surrounding Vegetation and Structures (26 February 2007)

Attack of the Sugar Maples (19 February 2007)

Box Elder Bugs (12 February 2007)

Short-term thinking can create long-term headaches (5 February 2007)

Excessive Heat Stress to Corn "Down Under" (29 January 2007)

Salt Injury (22 January 2007)

Sooty Blotch (15 January 2007)

Paperbark Maple in the Winter Landscape (8 January 2007)

Keep a Look out For New Invasive Plants in the Midwest Flyer (1 January 2007)

Poinsettia Plant – Is it Poisonous to Pets? (18-31 December 2006)

Dormant Overseeding is a viable tool for thin lawns (11 December 2006)

Wasp Nests (4 December 2006)

Native vs. Non-Native Plants (20 November 2006)

Dead Man's Fingers (13 November 2006)

Stinky Ginkgo Fruit (6 November 2006)

Deciduous Conifers (30 October 2006)

Foxtail in Title Only – Carolina Foxtail (23 October 2006)

Yikes, My Pines Are Dying! Otherwise known as Normal Fall Needle Drop (16 October 2006)

Spiders are a sign of good luck – when they are in your neighbors yard (9 October 2006)

Purple Crabgrass? (2 October 2006)

Corny Bouquets Can Be Troublesome for Growers (25 September 2006)

Do the Dead Spots in the Lawn come with the House? (18 September 2006)

Guignardia Leaf Blotch (11 September 2006)

Late Summer Leaf Fall in Trees (4 September 2006)

Smokin' Smoketree (28 August 2006)

Clubbed Roots in Corn (21 August 2006)

Tubakia (Actinoplete) Leaf Spot on Oak (14 August 2006)

Green June Beetles (7 August 2006)

Two Ears, Same Ear Shank (31 July 2006)

Hummingbird – no wait – it’s a moth! (24 July 2006)

Bi-color Flowering Dogwood (17 July 2006)

Velvet erineum gall mite (10 July 2006)

How to correctly and successfully protect a tree during construction (3 July 2006)

Mexican Bamboo (Polygonum cuspidatum) (26 June 2006)

Autumn Olive (19 June 2006)

Annual Ryegrass is appearing in many new lawns this spring (12 June 2006)

Fire Blight (5 June 2006)

Gravel Garden (29 May 2006)

Corkscrewed Corn Seedlings (22 May 2006)

Residual Roundup Damage (15 May 2006)

Dead or Alive? The Conifer Conundrum (8 May 2006)

Mulch Volcanoes (1 May 2006)

Flowering Dogwood Bracts (not petals!) (24 April 2006)

Carpenter Bees (24 April 2006)

Trumpetcreeper: One Tough Plant (17 April 2006)

Wooly Apple Aphid--A Galling Experience for Crabapples (10 April 2006)

Yellowjackets on Steroids (3 April 2006)

Preemergent Crabgrass Control Applications (27 March 2006)

"Chomped" Ear Symptoms in Corn (20 March 2006)

Asian Lady Beetles Emerge--Again! (13 March 2006)

So Long Suckers! (27 February 2006)

Winter dessication (20 February 2006)

Japanese Hops (Humulus japonicus) - One of Indiana Rising Problematic Weeds (13 February 2006)

A Story of Plant Pathology: Past to Present (6 February 2006)

Winter Turf Damage Due to Our Four-legged Friends (30 January 2006)

Stem Girdling Roots (23 January 2006)

Got Zebras in Your Corn Field? (16 January 2006)

What is it? (2 January 2006)

Holiday Cactus Blossom Drop (26 December 2005)

Apple of Peru, Apparently Not Something New (19 December 2005)

Kernel Sprouting on the Ear (12 December 2005)

"Nit Picking" (5 December 2005)

Common Chickweed showing up in Thin Turf Areas (28 November 2005)

Bitter Pit or Cork Spot of Apple (21 November 2005)

Oedema a Corky Quirk (14 November 2005)

Frost Injury (31 October 2005)

Leaf-footed Bugs (24 October 2005)

The wonderful world of crop forensics (17 October 2005)

Stinkhorn Mushrooms (10 October 2005)

Giant Night Flying Moths (3 October 2005)

Fall broadleaf weed control applications (26 September 2005)

Yellow Wooly Bear Caterpillars (19 September 2005)

Popped Kernels and Silk Cut (12 September 2005)

Polka-dot plant (5 September 2005)

Tree wounds and decay fungi (29 August 2005)

Corny Oddities: Tassel-Ears (29 August 2005)

White Snakeroot (15 August 2005)

Much Ado About Slime Molds (8 August 2005)

See No Weevil (1 August 2005)

Streaking across the Lawn??? (25 July 2005)

Cottony Maple Scale (18 July 2005)

Symptoms Associated With Low Soil pH in Corn (11 July 2005)

Asian Ambrosia Beetle (4 July 2005)

Dwarf Spruce (27 June 2005)

Hydrangea Flowers - Red, White, or Blue? (20 June 2005)

Roundup Ready Canola (13 June 2005)

Volutella Leaf Blight on Pachysandra (6 June 2005)

Yellow Nutsedge Beginning to Show (30 May 2005)

Snails - Mollusks out of water (23 May 2005)

European Pine Sawfly (16 May 2005)

Injury From Minor Frost and Radiational Cooling (9 May 2005)

A Galling Situation on Junipers (2 May 2005)

Smart Planting (2 May 2005)

Vinca minor - Friend or Foe? (25 April 2005)

Smooth Patch (18 April 2005)

Hollyhock Rust—NOT the same fungus as Soybean Rust!!! (11 April 2005)

Whitlow grass, the inconspicuous mustard (11 April 2005)

Daylily Leaf Streak---An Ounce of Prevention is Worth a Pound of Cure (4 April 2005)

Control moles now (28 March 2005)

Late Winter or Very Early Spring Overseeding to Reduce Summer Weed Problems (21 March 2005)

"Silver Leaf" Symptom in Young Corn (7 March 2005)

Foliar Nematodes (21 February 2005)

Whorled Leaves (14 February 2005)

Fireblight! Now is the time to prune out last year's infected branches! (7 February 2005)

Buckthorn (Rhamnus cathartica and Frangula alnus) (31 January 2005)

Ice Damaged Turfgrass (24 January 2005)

Winter Ice Damage to Trees (17 January 2005)

Symptoms of Deer Damage in Corn (10 January 2005)

Hang those hoses! (3 January 2005)

Most insects are smart enough to get out of the cold (27 December 2004)

Current observations may explain things later (20 December 2004)

Winged Twigs (13 December 2004)

Buffalobur (6 December 2004)

When a major storm strikes... (29 November 2004)

Taking Preventative Action (15 November 2004)

Pollen Drift in Corn: Visual Evidence (8 November 2004)

Ornamental Cabbage (1 November 2004)

Controlling Wild Onion or Wild Garlic in Lawn (25 October 2004)

Controlling broadleaf weeds after the drought (25 October 2004)

"Dying" Conifers - NOT! (18 October 2004)

When Burning Bush Won't Burn! (11 October 2004)

Goldenrod (4 October 2004)

Sooty Mold on Beech (27 September 2004)

Grub Damage Becoming Apparent (20 September 2004)

Corn Pollen and Silks (6 September 2004)

The Importance of Pruning Young Trees (30 August 2004)

Wasp nest? Let it be may be the best answer! (23 August 2004)

White Pine Decline (16 August 2004)

The Many Faces of Rudbeckia (9 August 2004)

Dodder (2 August 2004)

Powdery Mildew (26 July 2004)

Summer stress of Poa annua and Poa trivialis in Lawns and Sports Fields (19 July 2004)

Japanese Beetles (12 July 2004)

Foxglove (5 July 2004)

Over-Extended Mesocotyls & "Floppy Corn" (28 June 2004)

Earwigs (21 June 2004)

Rose Spot Anthracnose (14 June 2004)

Natural Shedding of Houseplants (7 June 2004)

Ligules on Grass (31 May 2004)

Controlling Ground Ivy (Creeping Charlie)??? (24 May 2004)

Cicadas Are Here!! (24 May 2004)

Anthracnose of Shade Trees or Wind Injury: Look Alike Symptoms Can Be Perplexing (17 May 2004)

Emerald Ash Borer (10 May 2004)

Coleoptile Appearance During Emergence (3 May 2004)

Cranesbill (26 April 2004)

Beware of Digital Photographs! (19 April 2004)

Scab on Pyracantha (12 April 2004)

Easter Lily (5 April 2004)

Purple, Yellow and White (29 March 2004)

Reduce Defoliation From Rose Black Spot; Plant Tolerant Cultivars (22 March 2004)

Low Maintenance Tall Fescue Lawns? (15 March 2004)

Insects and Winter (8 March 2004)

Corn Oddities: Silk Balling (1 March 2004)

Cucumbertree Magnolia (23 February 2004)

Gray Squirrels Damage Tree Limbs in Winter (9 February 2004)

Dead or Alive? (2 February 2004)

Seeds and Plants Crossing US Borders (26 January 2004)

ALS Resistant Common Ragweed (19 January 2004)

Lichens - More Than Meets the Eye (12 January 2004)

Snow Mold in Grass (5 January 2004)

Grape Hyacinth (29 December 2003)

Corny Oddities: Blunt Ear Syndrome (22 December 2003)

White Pine Weevils (15 December 2003)

Sphaeropsis Tip Blight (1 December 2003)

Fluoride Toxicity in Spider Plants (24 November 2003)

The Ancient Horsetail (17 November 2003)

HELP!! My Lawn is White!! (10 November 2003)

Reduce summer stress symptoms in Turf with a November fertilization (3 November 2003)

Spooked by Spiders? (27 October 2003)

Corny Oddities: Tassel-Ears (20 October 2003)

Japanese Blood Grass (13 October 2003)

Mini-pumpkin virus (6 October 2003)

Fusarium Rot of Pumpkin (29 September 2003)

An Apple in the Potato Family – Apple-of-Peru (15 September 2003)

Tuliptree Leaf Spot (8 September 2003)

Cicada Killer Wasps (25 August 2003)

Miscanthus mealybug (Miscanthiococcus miscanthi ) a pest of Miscanthus grass (25 August 2003)

Orange Shoes, Anyone? (18 August 2003)

Soggy Soils, Oxygen Deprivation, & Root Death in Corn (11 August 2003)

Cecropia Moth (4 August 2003)

Cedar-quince rust ( Gymnosporangium clavipes ) kills hawthorn fruit and twigs (28 July 2003)

Lily Bulbils (21 July 2003)

Glyphosate Resistant Horseweed/Marestail (14 July 2003)

Powdery Mildew in Phlox (7 July 2003)

Yellow Nutsedge in Turf (30 June 2003)

Damaged Ash Tree (23 June 2003)

Purpling in Corn (16 June 2003)

What’s Growing In My Mulch???? (16 June 2003)

Foliar distortion and stunted growth (9 June 2003)

A Fungal Blight on Pachysandra (2 June 2003)

Iris Leaf Spot (26 May 2003)

Wind and Frost Injury on Spruce, Fir and Deciduous Trees (26 May 2003)

Kousa Dogwood Bark (19 May 2003)

Garlic + Mustard = A Problematic Invasive (12 May 2003)

Bacterial Blight of Lilac (5 May 2003)

Now is the time to ID Poa annua (annual bluegrass) (21 April 2003)

Eastern Tent Caterpillar (21 April 2003)

Heat Stress and Corn Ear Development (14 April 2003)

Foliar Necrosis (7 April 2003)

Box Elder Bugs (31 March 2003)

Tree Decline (24 March 2003)

Ringspots and Line Patterns on Impatien Leaves Spell Trouble (17 March 2003)

Wild Onions and Wild Garlic – A Nuisance in Wheat Fields and Lawns (10 March 2003)

Tomato Seeds Jumping the Gun (3 March 2003)

Star of Bethlehem, Spring Beauty Will be Emerging Shortly (24 February 2003)

Shore Fly and Fungus Gnat (17 February 2003)

Scrambled Silks (10 February 2003)

Carmencita Castor Bean (3 February 2003)

Store Firewood Outside (27 January 2003)

Moldy Cornstalks (20 January 2003)

Contorted Filbert (13 January 2003)

Common Reed - Phragmites (6 January 2003)

Volcano Mulching (30 December 2002)

Bare Spots in the Lawn Left Behind by Summer Annuals (23 December 2002)

Emerald Ash Borer (16 December 2002)

Sidewall and Tillage Compaction Effects in Corn (9 December 2002)

Linden Mites (2 December 2002)

Saprophytic Fungi (25 November 2002)

Fall Needle Drop of Pine (18 November 2002)

Paulownia: Royal Princess or Royal Pain? (11 November 2002)

Chickweed (4 November 2002)

Picturesque Fungal Leaf Spots (30 October 2002)

Frost Damage on Turfgrass (21 October 2002)

Poison Ivy (14 October 2002)

Seed Abortion in Corn and Soybean (7 October 2002)

Sulfur Shelf and Jack-O-Lantern Fungus (30 September 2002)

Powdery Mildew on Zinnia (23 September 2002)

Two-Faced Hydrangea Flowers (9 September 2002)

Annual Ryegrass (4 September 2002)

Cicada Killer Wasps (12 August 2002)

Earwigs - Brain Boredom (29 July 2002)

Hola Bagworms (29 July 2002)

Anthracnose of Cucumber (8 July 2002)

Lunaria annua (L. biennis), Money Plant, Honesty, Silver Dollar Plant (8 July 2002)

Anthracnose of Corn (8 July 2002)

Herbicide Injury on Corn Inbreds (24 June 2002)

Brown Rot of Stone Fruits (24 June 2002)

Southern Blight of Hosta (17 June 2002)

Thatch Buildup in the Lawn (10 June 2002)

Tuliptree Flower (10 June 2002)

Scab of Crabapple (10 June 2002)

Anthracnose of Sycamore (3 June 2002)

Four-lined Plant Bug Nymph (3 June 2002)

Scab of Wheat (3 June 2002)

Flooding and Trees (20 May 2002)

Senecio (20 May 2002)

Orange Rust of Brambles (20 May 2002)

Witches' Broom (13 May 2002)

Columbine Sawfly (6 May 2002)

Powdery Mildew on Turf (29 April 2002)

Winter Injury on Rhododendron (22 April 2002)

Henbit, Purple Deadnettle, and Ground Ivy (15 April 2002)

Lawn Striping from Fertilizer Misapplication (8 April 2002)

Frost-Damaged Daffodils/Botrytis Blight on Tulips and Daffodils (8 April 2002)

Cedar Apple Rust or Cedar Hawthorn Rust (18 March 2002)

Flamed Rembrandt Tulips or Flamboyant Cultivated Tulips? (11 March 2002)

Bagworms (4 March 2002)

I vyleaf Morningglory (11 February 2002)

Daffodil Bulbs Sprouting in January (28 January 2002)

Insufficient Root Mass - Spruce (3 December 2001)

More Asian Lady Beetles! - (26 November 2001)

Cup Fungi - (26 November 2001)

Bitter Pit or Cork Spot of Apple (29 October 2001)

Stinkhorn Mushroom "Egg" (29 October 2001)

Immature Offspring of Hort Staff Member (22 October 2001)

Asian Lady Beetles (22 October 2001)

Millipedes (16 October 2001)

Frost-Damaged Morning Glories (16 October 2001)

House Centipede (16 October 2001)

Yellow Jackets ( 8 October 2001)

Safflower (17 September 2001)

Bagworm Defoliation and Volcano Mulching (17 September 2001)

Powdery Mildew on Zinnia (17 September 2001)

Sapsucker Injury (20 August 2001)

Classic K Deficiency in Corn (13 August 2001)

Mid- to Late-Season Caterpillars (13 August 2001)

Hedgehog Galls (6 August 2001)

Tomato Fruit Deformities - "Catfacing" (6 August 2001)

Cicada Killer Wasp or "Cicada Hawk" (30 July 2001)

Pokeweed or Pokeberry, Phytolacca americana (30 July 2001)

Command Damaged Turnips (23 July 2001)

Bagworm (23 July 2001)

Septoria Leaf Spot of Rudbeckia (16 July 2001)

Hickory Tussock Moth Caterpillars (16 July 2001)

Ligule of Southern Crabgrass (16 July 2001)

Grape Phylloxera (9 July 2001)

Immature Fruit of the Magnolia Tree (9 July 2001)

Summer Flowering Magnolia (9 July 2001)

Herbicide Injury of Soybean (2 July 2001)

Slime Mold (2 July 2001)

Oak Anthracnose (2 July 2001)

White Clover (25 June 2001)

Black Rot of Grapes (25 June 2001)

Spring Freeze Injury (25 June 2001)

Sycamore Anthracnose (18 June 2001)

Crayfish Chimney in Lawn (18 June 2001)

Armyworm Moth Feeding on Linden Flowers (18 June 2001)

Mushrooms in Lawns (8 June 2001)

Japanese Beetles (8 June 2001)

Septoria Brown Spot of Soybeans (8 June 2001)

Spittle Bugs (28 May 2001)

Mountain Ash Sawfly (28 May 2001)

Four-Lined Plant Bug (21 May 2001)

Armyworm (21 May 2001)

Garlic Mustard (16 May 2001)

Foliar Damage/Growth Regulator Injury from Herbicide Drift -- "2,4-D Is in the Air!" Expect to See Symptoms on Landscape Plants (16 May 2001)

Fire Blight Outbreak in Southern Indiana (16 May 2001)

Maple Petiole Borer (7 May 2001)

Hawthorn Leafminer (7 May 2001)

Contorted White Pine (7 May 2001)

Thistle box (2 May 2001)

European Pine Sawflies (2 May 2001)

Holly Leafspot (2 May 2001)

"Dead" Patches of Turf in Spring (23 April 2001)

Asian Lady Beetle (6 April 2001)

Deer Damage (27 February 2001)

Castor (6 January 2001)

Lightning Beetle Larva (11 November 2000)

Asian Lady Beetles are Back with a Vengeance (24 October 2000)

Bacterial Leaf Scorch (6 October 2000)

Cynipid Gall Wasp (6 September 2000)

Annual Cicada (28 August 2000)

Dodder (14 August 2000)

White Pine Weevil (8 August 2000)

Catalpa Sphinx (31 July 2000)

Iris Borer (25 July 2000)

Soybean Cyst Nematode (SCN) (17 July 2000)

Black Rot and Anthracnose of Grape (11 July 2000)

Slime Mold in Turf (28 June 2000)

Yucca Bug (5 June 2000)

Oak Tatters (31 May 2000)

Stinkhorn (22 May 2000)

Corn Flea Beetle Damage (15 May 2000)

Volutella Blight of Pachysandara (8 May 2000)

Rose Slug (1 May 2000)

Western Pine Gall Rust (24 April 2000)

Drought Stressed Spruce (17 April 2000)

Star of Bethlehem (10 April 2000)

Winter Stonefly (8 March 2000)

Witches' Broom (31 October 1999)

Bald-faced Hornet Nest (18 October 1999)

Spurred Anoda (4 October 1999)

Tubakia Leaf Spot of Oak (27 September 1999)

Common Quince (20 September 1999)

Io Moth Caterpillar (13 September 1999)

Sulphur shelf - Fried Chicken Breast for Vegetarians! (30 August 1999)

Bagworms: What are they? (23 August 1999)

Dodder, Cuscuta sp. -- Attack of the String Monster! (16 August 1999)

Phyllosticta Leaf Spot of Soybean (9 August 1999)

Black Rot of Grape (2 August 1999)

Iris Borer and Bacterial Soft Rot (26 July 1999)

Sudden Death Syndrome (SDS) of Soybean (20 July 1999)

Hollyhock Rust (8 June 1999)