Garden Pests and Diseases of Celery and Celeriac

Pests, Diseases and Problems of Vegetables

See also Pests and Diseases of Seedlings and Young Plants,

Garden Pests and Diseases of Cucurbits

Pests, Diseases and Problems of Vegetables (Brassicas and related crops)


Celery and Celeriac


Bolting

garden pests and diseases of celery and celeriac - celeriac Typical symptoms: Plants produce flower stems prematurely.

Prevention and treatment: Raise plants in modules to avoid root disturbance. Keep young plants at a minimum temperature of 12°C (54°F), even when planted out. Ensure that the crop does not go short of water.


Boron deficiency

Typical symptoms: Leaf stalks split and show discoloured brownish patches.

Prevention and treatment: See Plant Mineral Deficiencies


Carrot root fly (Psila rosae)

Typical symptoms: Plants collapse and the base of stem and roots are tunnelled by small white maggots.

Prevention and treatment: see Garden Pests and Diseases – Barriers and Traps


Celery leaf miner (Euleia heracleii)

Typical symptoms: Leaves develop brown blotchy “mines” which contain small larvae. These later dry to give a scorched look.

Prevention and treatment: Where celery leaf miner is a recurrent problem, protect affected. Plants with a lightweight cover (see Garden Pests and Diseases – Barriers and Traps). Pick off infected leaves or squash the larvae within them.


Downy mildew (Perenospora nivea)

Typical symptoms:Pale yellow spots appear on the leaves; grey mould may develop on the underside in damp weather. This mildew may also infect parsnips.

Prevention and treatment: See How to Treat Common Plant Diseases


Grey mould (Botrytis cinerea)

Typical symptoms: Leaf stalks are rotted and grey mould is present.

Prevention and treatment: See How to Treat Common Plant Diseases


Leaf spot (Septoria apicola)

Typical symptoms: Leaves develop small brown spots with black pinheads in them. Symptoms of this disease are seen on the oldest leaves first.

Prevention and treatment: Seed and crop debris are the main sources of infection, so always clear away infected plants and those that have finished cropping. Never save seed from an infected plant. Thin plants early to allow a good airflow.


Sclerotinia (Sclerotinia sclerotiorum)

Typical symptoms: Leaf stalks rot at the base. Also, a white fluffy mould may be present.

Prevention and treatment: See How to Treat Common Plant Diseases


Slugs

Typical symptoms: Irregular pieces are eaten out of stems. Slime trails may be seen.

Prevention and treatment: See Slugs and Snails – Garden Pest Control


Splitting

Typical symptoms: Leaf stalks split but show no discoloration.

Prevention and treatment: See Plant Disorders – Understanding the Problem


Violet root rot (Helicobasidium brebissonii)

Typical symptoms: Roots and tubers are covered with dark purple strands; they may also rot. The upper part of the plant may become stunted and discoloured.

Prevention and treatment: See How to Treat Common Plant Diseases


Viruses

Typical symptoms: Irregular yellow patterns appear on leaves.

Prevention and treatment: See Plant Diseases – Understanding the Problem

02. February 2011 by Dave Pinkney
Categories: Organic Gardening, Pests and Diseases | Tags: , , , | Comments Off on Garden Pests and Diseases of Celery and Celeriac

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