Weeping Cherry Borer Infestation: Identification and Spinosad Treatment

A 20-year-old weeping cherry in Victoria, Australia, suddenly declined. Trunk shows a large hole with paper-thin wood and tiny internal holes. No visible insects. Owner asks if the tree is savable and if a nearby cherry

Ranunculus Powdery Mildew: Identification and Organic Control

Ranunculus Disease Potted ranunculus in Chandigarh (15–22 °C) shows wilting, yellowing, and a wipeable whitish coating on leaves. No mites found. Diagnosis: Powdery Mildew The dewy coating is classic Podosphaera powdery

Sheep vs. Cow Manure for Apple Orchards: Nutrient Profiles and Fire Blight Risk

A grower switched from cow to sheep manure in an apple orchard and wants a nutrient comparison. Key Differences FactorCow ManureSheep Manure Nitrogen (N)HigherLower Phosphorus (P) & Potassium (K)ModerateHigher CostHighe

Umbrella Plant New Growth Shriveling: Water, Light, and Mite Checklist

A second umbrella plant (Schefflera) in Canada suffers the same fate: all new growth shrivels and dies. The owner seeks the cause. Top Suspects Underwatering: Schefflera needs thorough soaking, then dry-down to 1 depth.

Norfolk Island Pine Decline: Root Issues, Resin, and Orange Leachate

A Norfolk Island pine shows yellowing foliage, hardened sap droplets on the top shoot, and orange water in the drainage saucer. Tap water is used; a filmy residue coats branches. No visible pests. Root Zone Suspects Ove

Pecan Tree "Moss" Is Lichen; Real Problem Is Limb Dieback

Fifty pecan trees have a mossy growth on limbs. Affected limbs appear unhealthy and break off. Owner asks how to treat the growth and restore vigor. The Growth Is Harmless Lichen Lichens are symbiotic algae-fungus organi

Replanting Dogwood After Fungal Loss: Site Preparation and Tree Selection

A beloved 15-year-old pink dogwood died rapidly from fungal disease. The owner wants to replant in the same spot. Soil-Borne Pathogen Persistence Many root-rot fungi (Phytophthora, Armillaria) survive years in soil witho

Bluebottle Flies Swarming Camellias: The Hidden Breeding Source

Two camellia bushes host hundreds of bluebottle flies (shiny blue, loud buzzers). Disturbing the shrubs sends clouds of flies onto the house siding. Why They’re There Bluebottle flies (Calliphora spp.) breed exclusively

Legume Cover Crops in Pomegranate/Avocado Orchards: Nitrogen Benefits and Disease Myths

A grower planted fava beans and snap peas in a young pomegranate/avocado orchard for nitrogen fixation. Advice received: chickpeas carry fungal diseases to the orchard. Also asks about edamame (soybeans). Nitrogen Fixati

Mystery Fungi on Store-Bought Vegetables: Slime Molds and Post-Harvest Molds

A gardener encounters three unusual fungi on organic produce: Hydroponic tomatoes covered in lustrous black fur (hairs 3/8 long). Red bell pepper with perfect skin but seed cavity packed with blue-black fuzzy mold. Broc

Gardenia and Star Jasmine Troubles: Iron Chlorosis, Fungus, and Drainage

Jasmine Gardenia A new homeowner in Texas sees declining gardenias and star jasmine. Initial advice covered common issues; follow-up photos confirm specific problems. Star Jasmine: Cercospora Leaf Spot The reddish spot

Opportunistic Plant Pathogens: Why Stress Invites Disease

A concise explanation of opportunistic microorganisms in plant pathology. Definition Opportunistic pathogens are microbes (fungi, bacteria) that are normally harmless saprophytes or weak parasites. They only cause diseas

Coconut Palm Aphid Infestation: Honeydew and Sooty Mold Management

A West Palm Beach yard full of coconut palms is heavily infested with aphids (alphids), producing honeydew that drips onto understory plants. Neem oil and dish detergent sprays wash off with rain/irrigation. Why Conventi

Leaning Blue Spruce: Assessing Stability and Root Health

Blue Spruce A 50-foot blue spruce has a pronounced S-curve: the lower 10–12 ft lean to one side, the middle 25 ft snake in an S-shape, and the top 10–15 ft grow straight but offset 6 ft from the base. The lean appears t

Lucky Bamboo (Dracaena sanderiana) Brown Tips: Water Quality Is Key

A commercial grower of Dracaena sanderiana (often sold as lucky bamboo) reports brown marks in leaf centers and brown tips. The crop is grown for extra income. Primary Cause: Tap Water Toxicity Lucky bamboo is exquisitel

Rhapis Palm Decline in Decorative Pots: The Hidden Water Trap

Four 14-inch Rhapis palms (lady palms) were placed—nursery pots and all—into tall decorative planters with bright indirect light. Within a week, fronds drooped, yellowed, and turned brown-crispy. Soil feels moist, not so

Brazilian Red Cloak Leaf Damage: Environmental Stress, Not Disease

Black Leaves Black Leaves 2 Two-week-old Brazilian Red Cloaks (Megaskepasma erythrochlamys) show blackened leaf centers and edges with curling, despite vigorous new green growth. The owner wonders if a fungus is respon

Mushrooms at Mimosa Base Signal Advanced Internal Decay

The owner noticed bark shedding on 3-inch branches that snapped easily, revealing rotten wood. Now mushrooms are fruiting in the soil around the trunk base in Southern California. What the Mushrooms Mean Fungal fruiting

Kumquat Crisis: Fertilizer Spike Burns Potted Citrus

A healthy 2-foot potted kumquat in partial sun suddenly developed shriveled, spotted brown leaves—still soft, not crispy—days after a Miracle-Gro fruit tree fertilizer spike was inserted at the pot’s perimeter. The owner

Chinese Pistache 'Keith Davey': Healing Trunk Wound and Long-Term Stability

Chinese Pistache Trunk Chinese Pistache The owner previously reported black discoloration at the base of a Keith Davey Chinese pistache. New photos show a healed-over area near the soil line that looked worse last spri