Grey mould

Botryotinia
Grey mould
	Grey mould on tomato fruit
	Scientific Classification
Kingdom:	Fungi
Phylum:	Ascomycota
Subphylum:	Pezizomycotina
Class:	Leotiomycetes
Order:	Helotiales
Family:	Sclerotiniaceae
Genus:	Botryotinia
Species:	Botrytis cinerea and Botrytis fabae

Grey mould or gray mold (Botrytis cinerea) is a fungal pathogen of plants with a wide variety of hosts. B. cinerea is also a cause of damping off in seedlings.

Identifying Features[edit | edit source]

Grey mould usually starts on a damaged area of stem. Other parts of the plant may then be infected - diseased flower stalks cause fruit drop.

Treatment[edit | edit source]

Cut out diseased areas and remove all rotting parts.

Prevention[edit | edit source]

Reduce humidity by adequate ventilation and avoid overcrowding. Remove decaying leaves and fruit. No systemic sprays are available.

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Examples[edit | edit source]

References[edit | edit source]

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v • d • e Bean troubles
Broad bean · French bean · Runner bean
Adverse conditions	Frost · Iron deficiency · Manganese deficiency · Sun scald
Diseases	Bacterial brown spot of bean · Bean anthracnose · Bean common mosaic virus · Beet curly top virus · Brown spot · Chocolate spot · Charcoal rot · Floury leaf spot · Fusarium wilt · Grey mould · Halo blight · Phoma blight · Powdery mildew · Pythium · Rust · Sclerotinia rot · Southern blight · Tomato ringspot virus · Tobacco ringspot virus · White leaf spot
Pests	Aphid · Capsid bug · Leaf miner (Vegetable leafminer) · Red spider mite · Root-knot nematode · Slug · Stem and bulb nematode · Thrips (Bean flower thrips, Onion thrips, Western flower thrips)

v • d • e Chrysanthemum troubles
Garland chrysanthemum · Oxeye daisy
Adverse conditions
Diseases	Bacterial leaf spot of endive · Bacterial soft rot · Bacterial soft rot of chrysanthemum · Cercospora leaf spot of chrysanthemum · Chrysanthemum stunt viroid · Chrysanthemum white rust · Crown gall · Grey mould · Impatiens necrotic spot virus · Phlox powdery mildew · Potato yellow dwarf virus · Ray blight of chrysanthemum · Rhizoctonia solani · Sclerotinia rot · Septoria leaf spot of chrysanthemum · Tomato spotted wilt virus
Pests	Chrysanthemum aphid · Egyptian cottonworm · Green peach aphid · Leaf miner (Chrysanthemum leaf miner, Pea leafminer) · Red spider mite

v • d • e

Cucurbit troubles

Courgette · Cucumber · Marrow · Pumpkin · Squash

Adverse conditions

Calcium deficiency · Frost · Oedema · Potassium deficiency · Sun scald · Split fruit

Diseases

Bacterial	Bacterial brown spot of bean · Bacterial leaf spot of Cucurbits · Bacterial soft rot · Bacterial wilt · Bacterial brown spot
Fungal	Alternaria brown spot · Alternaria leaf blight · Alternaria leaf spot · Angular leaf spot of cucumber · Anthracnose of Cucurbits · Choanephora fruit rot · Charcoal rot · Corynespora blight · Damping off · Downy mildew · Fusarium wilt · Grey mould · Gummosis · Gummy stem blight · Leaf spot · Phoma blight · Phomopsis blight · Phytophthora blight · Plectosporium blight · Powdery mildew · Pink mold rot · Plectosporium blight · Pythium · Pythium blight · Rhizoctonia solani · Rhizopus soft rot · Sclerotinia rot · Septoria leaf blight · Southern blight
Viral	Cucumber mosaic virus · Cucurbit yellow stunting disorder · Lettuce infectious yellows virus · Papaya ringspot virus · Squash mosaic virus · Tomato ringspot virus

Pests

Aphid · Greenhouse whitefly · Large white · Leaf miner · Red spider mite · Root-knot nematode · Slug · Thrips (Onion thrips, Western flower thrips)

v • d • e Lettuce troubles
Adverse conditions	Bolting · Calcium deficiency · Phosphorus deficiency
Diseases	Aster yellows · Bacterial leaf spot of lettuce · Bidens mottle virus · Downey mildew · Grey mould · Lettuce infectious yellows virus · Sclerotinia rot
Pests	Aphid · Cutworm · Flea beetle · Root-knot nematode · Slug

v • d • e Mint troubles
Basil · Lavender · Lemon balm · Marjoram · Mint · Oregano · Rosemary · Sage · Savory · Thyme
Adverse conditions	Bolting
Diseases	Bacterial leaf spot of endive · Downy mildew · Fusarium wilt · Grey mould · Powdery mildew · Rhizoctonia solani · Rust · Septoria leaf spot of lemon balm · Verticillium wilt
Pests	Aphid · Cabbage whitefly · Capsid bug · Celery fly · Leaf miner · Leafhopper · Red spider mite · Shore fly · Silver Y moth · Slug

v • d • e Pepper troubles
Chilli · Sweet pepper
Adverse conditions	Calcium deficiency · Sun scald
Diseases	Alfalfa mosaic virus · Anthracnose fruit rot of pepper · Bacterial spot of tomato and pepper · Cucumber mosaic virus · Frogeye leaf spot · Grey mould · Pepper mild mottle virus · Phoma blight · Phytophthora blight · Sclerotinia rot · Southern blight · Tobacco etch virus · Tomato spotted wilt virus
Pests	Aphid · Leaf miner · Pepper weevil · Red spider mite · Root-knot nematode · Thrips (Chilli thrips, Western flower thrips)

v • d • e

Tomato troubles

Adverse conditions

Blossom drop · Blossom end rot · Catfacing · Dry set · Fasciation · Frost · Greenback · Hollow fruit · Leaf roll · Leggy plants · Magnesium deficiency · Nitrogen deficiency · Oedema · Phosphorus deficiency · Potassium deficiency · Split fruit · Sun scald · Tomato stem primordia

Diseases

Bacterial	Bacterial canker of tomato · Bacterial spot of tomato and pepper · Crown gall · Brown rot
Fungal	Anthracnose of tomato · Black dot · Buckeye rot · Corynespora blight · Early blight · Fusarium wilt · Ghost spot · Grey mould · Late blight · Phoma rot · Rhizoctonia solani · Rhizopus soft rot · Septoria leaf spot · Sclerotinia rot · Southern blight · Stem rot · Tomato leaf mould · Verticillium wilt
Viral	Beet curly top virus · Cucumber mosaic virus · Impatiens necrotic spot virus · Potato virus Y · Tomato bushy stunt virus · Tomato mosaic virus · Tomato ringspot virus · Tomato spotted wilt virus · Tomato yellow leaf curl virus

Pests

Aphid · Cabbage whitefly · Flea beetle · Greenhouse whitefly · Leaf miner (Tomato leafminer, Vegetable leafminer) · Potato cyst nematode · Potato psyllid · Root-knot nematode · Slug · Thrips (Eastern flower thrips)

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