Blood Orange Leaf Curl and Drop: Fruit Load Stress in Heat

5-year-old blood orange, first good fruit set. Leaves curl, droop, drop. Explanation In hot, dry climate, tree stressed by first/second fruit crop drops leaves to support fruit. Natural response. Action Water adequate

Robellini Palm Brown Shoots: Wind, Humidity, or Lethal Disease?

Two double Robellini palms near pool in Largo, FL: thin, pale, new shoots 25–50% brown/dead. Fed palm food. Owner wants thicker, greener growth. Possible Causes Wind drying: Move to sheltered spot if potted. Low humidi

Crop Rotation vs. Nature: Why Farmers Rotate, Wild Plants Don't

Question: Why rotate crops on farms when nature has same plants returning yearly? Answer Perennials (berries, etc.) dont need rotation—they persist. Annual vegetables (corn, beans) deplete specific nutrients and build

Crape Myrtle Black Leaves: Sooty Mold from Aphids

Crape myrtle leaves turning black. Cause: Aphids → Honeydew → Sooty Mold Aphids suck sap, excrete sticky honeydew. Sooty mold grows on honeydew, blackening leaves. Leaves often sticky. Control Spray foliage with con

Indoor Palm Sunburn and Decline: Light and Watering Needs

New indoor palm in low-light bedroom; put on porch one afternoon, leaves browned at arches. Now more browning. Species unknown. Key Points All palms need bright indirect light; shade-tolerant still need good light. Low

Mango Tree Black Spots on Branches: Check for Scale

Mango flowers die yearly; weekly mancozeb doesnt help. Black spots on branches. Diagnosis Step Scrape spots with fingernail: if they come off with liquid inside = scale insects. Scale causes flower/fruit failure. Next

Sedum Crown Rot and Sudden Plum Death: Separate Issues

Black Jack Sedum wilting from base, brown hollow stems. Two 6-ft plums died suddenly after year+ in ground. Hot, dry SC summer; regular watering. Sedum: Root/Crown Rot Fungal; from overwatering or chemical burn. Pull e

Wax Myrtle Rust Powder: Likely Slime Mold, Check Watering

South Texas wax myrtles have rust-colored powdery growth on trunks; bark cracked underneath. Some dead, then whole shrub dies. Assessment Rust powder likely slime mold—non-pathogenic, just reproducing. Real issue: wate

Honeysuckle Leaf Spots: Copper Fungicide/Bactericide for Wet Weather

6-week-old honeysuckle (memorial plant) has yellow lower leaves with tiny black spots not rubbing off. Rainy weather. Buds browning. Diagnosis Fungal or bacterial leaf spot (spots dont rub off = not insects). Treatment

Magnolia 'Elizabeth' Leaf Curl and Bud Drop: Transplant Shock or Sun Scorch

New 5-ft magnolia has curled, spotted leaves; flowers brown and drop unopened; abundant new growth. Likely Causes Sun scorch: Water droplets on leaves in full sun act as magnifying glasses. Transplant shock: Recent pla

Crimson Red Maple Scale: Systemic Soil Drench Control

Scale on bark of crimson red maple; removed scale shows bug-like remains. Owner asks about spider mites. Diagnosis: Scale Insects Immobile; leave behind hollow covers that look like bugs. Spider mites unlikely on bark.

Alder Tree Holes in Ring: Sapsucker Woodpecker, Not Harmful

Alder in Seattle has ¼-inch holes in a ring 15 ft up, with reddish sap. Cause: Sapsucker Woodpecker Bird drills holes → sap attracts insects → bird eats insects. Does not harm tree. If Deterrence Desired Spray hole a

Hibiscus Stem Dieback: Need Location and Conditions

Outdoor hibiscus did well last year; this year stems dry up and die. No other details. Possible Causes Cold injury from winter (delayed symptom). Root rot from overwatering/poor drainage. Need More Info Geographic lo

Italian Cypress Dead Zone: Spider Mites Likely

Row of 15 Italian cypress, 12 ft tall. End tree has recurring dead zone on east side (ground to 3 ft). Sprayed for spiders 2 years ago helped; recent spray failed. Diagnosis: Spider Mites Test: tap branch over white pa

Fruitless Mulberry Leaf Curl: Check for Aphids First

30-year-old fruitless mulberry in Santa Clara has curled, pale, bumpy leaves on 50%+ of canopy. City pruned 3x in 3 years. Spectracide weed killer used nearby. Primary Suspect: Aphids Feed on upper leaves → curling, ye

Aspen Black Blotches: Fungal Leaf Spot Despite Dry Weather

Quaking aspens in dry, hot, fire-prone area have dried leaves with black blotches. Diagnosis Fungal leaf spot (e.g., Marssonina) possible even in dry weather. Treatment Spray Daconil fungicide per ornamental label. Re

Japanese Pistachio with Verticillium Wilt: No Cure, Potassium May Help

7-year-old Japanese pistachio in Albuquerque has had Verticillium wilt two years running—yellow, curling, dropping leaves in June–July. Spring growth good. Reality No cure for vascular wilt. Potassium deficiency worsens

Victoria Plum Maggots: Plum Moth, Preventive Spraying Required

Two-year-old potted Victoria plum in UK has maggots in every fruit (15 checked). Owner wants prevention for next year. Pest: Plum Moth (Cydia funebrana) Larvae tunnel into fruit; only control is preventive insecticide s

Clearance Rose Bushes with Black Stems and Spots: Black Spot and Canker

Recently bought clearance roses have black stems, yellow/black-spotted leaves, drying foliage. Two are tree roses. Problems Black spot (fungal): yellow leaves with black spots. Canker (fungal): black stems. Rescue At

Large Oak with Bracket Fungus: Decay Fungus, Not Treatable with Systemics

Legacy broadleaf oak (10+ ft girth) in Atlanta has dying low limbs, fungal conk at base after 25 problem-free years. Owner wants soil-applied systemic fungicide. Diagnosis: Decay Fungus (Heart Rot) Fruiting bodies (con