AGreenNestPlant Pests & Diseases
52 articles tagged "Plant Pests & Diseases".
Explore 52 Plant Pests & Diseases articles from AGreenNest — practical, research-backed care guides, troubleshooting, and hands-on tips to keep your plants thriving. Every guide is written and tested by our editorial team before it publishes.
Plant Pests & Diseases
Brown Spots on Leaves: Fungal vs Bacterial Leaf Spot
Brown or black spots with yellow halos are leaf spot. Tell fungal from bacterial by the halo and the spread, then prune, improve airflow, and spray a targeted fix within 48 hours.
Plant Pests & Diseases
5 Plant Disease Myths I Wish I'd Stopped Believing
Old wives' tales about yellow leaves and cinnamon cures cost plants their lives. I checked the research and the clinic samples, and here are the five disease myths that do real damage.
Plant Pests & Diseases
Broad Mites: Why New Leaves Come Out Twisted
Broad mites are microscopic pests that twist new leaves into a shiny, blistered mess. Learn the signs, how to confirm them with a 10x loupe, and a three week plan to clear them.
Plant Pests & Diseases
Scale Insects on Houseplants: Remove Them Fast
Those little brown bumps stuck to your stems are scale, sap-sucking insects that leave sticky honeydew and black soot. Learn to spot them, scrub them off, and stop them returning in three weeks.
Plant Pests & Diseases
Root Mealybugs: Spot Them and Kill Them
Root mealybugs hide below the soil and starve a plant slowly. Learn how to spot the white waxy crust on the roots, why they appear, and a 48-hour bare-root fix that saves the plant.
Plant Pests & Diseases
White Mold on Plant Soil: Clear It Fast
That white fuzzy growth on your potting soil is a harmless saprophyte, but it signals wet, stale conditions. Learn what it is, whether it hurts the plant, and how to clear it in a few days.
Plant Pests & Diseases
I Tested 4 Fungus Gnat Traps on 12 Plants
I ran yellow cards, a vinegar bowl, a BTI dunk, and a sand top dressing across 12 gnat infested plants for 14 days. Here are the real catch counts and which combo actually cleared them.
Plant Pests & Diseases
I Saved My Monstera from Spider Mites
A first-person week-by-week rescue of a Monstera deliciosa hit by spider mites: shower, soap wipe, neem every three days, and raised humidity cleared the colony in about three weeks.
Plant Pests & Diseases
5 Plant Pest Control Myths Busted
Think soapy water kills every bug, or that more neem is always better? We bust five houseplant pest-control myths and explain what works to clear pests.
Plant Pests & Diseases
Botrytis Gray Mold: Save Plants in 48 Hours
Gray fuzzy mold on flowers and stems? Botrytis cinerea thrives in damp, still air. Learn the common causes and a 48-hour rescue plan to save your plants.
Plant Pests & Diseases
Downy Mildew on Houseplants: Spot It and Stop It in 48 Hours
Downy mildew looks like dust on the leaf underside and yellow patches on top. Catch the cause, isolate the plant, and treat within 48 hours to save it.
Plant Pests & Diseases
Black Leaf Coating? Sooty Mold 48-Hour Fix
Black leaf coating? Sooty mold feeds on honeydew from aphids, mealybugs, scale and whitefly. Get a 48-hour fix to clean leaves and stop the pests for good.
Plant Pests & Diseases
Whiteflies on Houseplants: Spot Them and Clear Them in 48 Hours
Whiteflies rise in a cloud when you touch the leaves and leave sticky honeydew behind. Find the cause, isolate the plant, and treat the undersides within 48 hours to stop the spread.
Plant Pests & Diseases
I Rescued a Fiddle Leaf Fig from Scale
A first-person week-by-week rescue of a Ficus lyrata covered in scale insects: isolation, alcohol swabs, neem oil, and the new leaves that proved it worked.
Plant Pests & Diseases
Bacterial Blight: Spots, Smell & How to Stop It
Bacterial blight and leaf spot cause foul-smelling water-soaked spots with yellow halos. Learn to prune, dry leaves, and treat with copper soap to save plants.
Plant Pests & Diseases
Caterpillars on Plants: Chewed Leaves & Quick Fixes
Caterpillars and leaf-chewing larvae leave holes and frass on indoor and patio plants. Learn to hand-pick, use neem oil, Bt, and insecticidal soap to stop them.
Plant Pests & Diseases
Damping-Off in Seedlings: Causes & Easy Prevention
Damping-off makes seedlings collapse at the soil line from Pythium and fungi. Learn to use sterile mix, bottom water, and cinnamon to prevent seedling killer.
Plant Pests & Diseases
Rust Fungus on Houseplants: ID, Treatment & Prevention
Orange and yellow rust fungus pustules on houseplant leaves? Learn what rust looks like, why it spreads, and how to treat and prevent it with neem oil.
Plant Pests & Diseases
Houseplant Pests: The Complete Identification & Treatment Manual
Spot, name, and kill every common houseplant pest — with a fast identification table, safe treatment for each, and the routine that keeps them from coming back.
Plant Pests & Diseases
Brown Leaf Tips on Houseplants: 4 Common Causes
Discover why houseplant leaf tips turn brown from low humidity, tap water, watering mistakes and salt buildup, with fixes: distilled water and humidity trays.
Plant Pests & Diseases
How to Deal With Aphids
Aphids: what it looks like, why it happens, and the fix. Clusters of soft green/yellow bugs on new growth; sticky leaves.
Plant Pests & Diseases
How to Deal With Edema
Edema: what it looks like, why it happens, and the fix. Blistered, corky, or watery bumps on the undersides of leaves.
Plant Pests & Diseases
How to Deal With Etiolation (Too Little Light)
Etiolation (Too Little Light): what it looks like, why it happens, and the fix. Pale, stretched, leaning growth with wide gaps between leaves.
Plant Pests & Diseases
How to Deal With Fungus Gnats
Fungus Gnats: what it looks like, why it happens, and the fix. Tiny black flies hovering over the soil surface.
Plant Pests & Diseases
How to Deal With Leaf Spot
Leaf Spot: what it looks like, why it happens, and the fix. Brown or black spots with yellow halos on leaves.
Plant Pests & Diseases
How to Deal With Mealybugs
Mealybugs: what it looks like, why it happens, and the fix. White, cottony clumps in leaf joints and at the base of leaves.
Plant Pests & Diseases
How to Deal With Over-fertilisation
Over-fertilisation: what it looks like, why it happens, and the fix. Crispy brown leaf edges and a white crust on the soil.
Plant Pests & Diseases
How to Deal With Powdery Mildew
Powdery Mildew: what it looks like, why it happens, and the fix. White powdery coating on leaves and stems.
Plant Pests & Diseases
How to Deal With Root Rot
Root Rot: what it looks like, why it happens, and the fix. Yellow, wilting leaves in wet soil; black, mushy roots and a sour smell.
Plant Pests & Diseases
How to Deal With Scale Insects
Scale Insects: what it looks like, why it happens, and the fix. Brown, dome-shaped bumps stuck to stems and leaves.
Plant Pests & Diseases
How to Deal With Spider Mites
Spider Mites: what it looks like, why it happens, and the fix. Fine webbing and stippled, bronzed, or speckled leaves.
Plant Pests & Diseases
How to Deal With Sunburn
Sunburn: what it looks like, why it happens, and the fix. Bleached white or brown scorched patches, often on the side facing the window.
Plant Pests & Diseases
How to Deal With Thrips
Thrips: what it looks like, why it happens, and the fix. Silvery streaks and tiny black droppings on leaves; distorted new growth.
Plant Pests & Diseases
How to Deal With Whitefly
Whitefly: what it looks like, why it happens, and the fix. Tiny white moth-like insects that fly up when disturbed.
Plant Pests & Diseases
How to Eliminate Fungus Gnats for Good
Eliminate fungus gnats with sticky traps, hydrogen peroxide drenches, and bottom watering. A AGreenNest guide to breaking the gnat life cycle in houseplants.
Plant Pests & Diseases
Fungus Gnats vs Spider Mites
Tell these two common pests apart and pick the right fix for each.
Plant Pests & Diseases
How to Get Rid of Mealybugs on Houseplants
Learn how to get rid of mealybugs with isolation, alcohol swabs, neem oil, and insecticidal soap. A complete AGreenNest guide to save your infested houseplants.
Plant Pests & Diseases
Identifying Plant Pests Early
The first tiny signs that tell you a pest has arrived -- before it spreads.
Plant Pests & Diseases
Neem Oil: The Backyard Pest Fix
How to mix and use neem oil safely for houseplant pests, and why it is a beginner's best friend.
Plant Pests & Diseases
Pet-Safe Pest Control Indoors
How to deal with houseplant pests when cats and dogs share your home.
Plant Pests & Diseases
Powdery Mildew on Houseplants
The white dust on leaves, why it appears, and how to clear it.
Plant Pests & Diseases
How to Quarantine New Plants (and Why It Saves Your Collection)
A two-week isolation routine that stops pests before they spread to your healthy plants.
Plant Pests & Diseases
Root Rot First Aid: Saving a Soggy Plant
The step-by-step rescue when leaves wilt in wet soil and roots have gone mushy.
Plant Pests & Diseases
Saving a Plant After a Pest Outbreak
Step-by-step recovery: from isolation and treatment to helping the plant regrow.
Plant Pests & Diseases
How to Save a Plant With Root Rot
Save a plant with root rot by unpotting, trimming mushy roots, and repotting in gritty soil. A AGreenNest step-by-step recovery guide for overwatered plants.
Plant Pests & Diseases
Scale Insects on Houseplants: Identification and Treatment
Learn how to identify scale insects on houseplants and treat them with alcohol swabs, horticultural oil, neem oil, and systemic granules. AGreenNest guide.
Plant Pests & Diseases
Spider Mites on Houseplants: ID and Treatment
Identify spider mites by fine webbing and stippled leaves, then treat with neem oil, humidity, and quarantine. A AGreenNest guide to saving infested plants.
Plant Pests & Diseases
Sunburn vs Pest Damage: Telling Them Apart
How to read scorched leaves versus pest feeding so you treat the right problem.
Plant Pests & Diseases
How to Treat Powdery Mildew on Plants
Treat powdery mildew with potassium bicarbonate, milk spray, or neem oil. A AGreenNest guide to identifying and preventing white fungal coating on houseplants.
Plant Pests & Diseases
When to Throw Away a Plant (and When Not To)
An honest guide to giving up gracefully versus saving a plant worth saving.
Plant Pests & Diseases
Whiteflies on Houseplants: How to Get Rid of Them
Learn how to get rid of whiteflies on houseplants using yellow sticky traps, neem oil, vacuuming, and isolation. A complete AGreenNest guide to break the cycle.
Plant Pests & Diseases
Why Are My Leaves Turning Yellow? (Non-Pest Causes)
The most common non-pest reasons for yellow leaves, and the fix for each.