VEGETABLE DISEASES

ASPARAGUS

FROST

Causes pinching and shrinking of stem just below the bud.

BEAN, DWARF AND RUNNER

ANTHRACNOSE

Brown spotting on stems and pods often due to infected seed. Change site.

FOOT ROT

Frequently due to planting too often on same site.

VIRUS

Mosaic can be carried on the seed. Destroy infected plants.

CABBAGE FAMILY

CLUB ROOT

Thickened, swollen roots preventing good growth. Apply lime for brassicas.

RING SPOT

Brown spots with concentric rings.

Not usually a serious disease.

DOWNY MILDEW

Common but rarely serious. Yellow patches on leaves. Spray young plants with zineb and do not allow them to suffer dryness of soil.

VIRUS

Several kinds, some infecting flower crops such as wallflower, stocks and candytuft. Destroy first affected plants. Keep down aphids.

CUCUMBER

MILDEW

Spray colloidal copper at half strength.

VIRUS

Mosaic green mottling in leaves. Destroy affected plants when young. Keep down insects.

WITHERING

Young fruits wither through weakness due to faulty cultivation.

LEEK

SMUT

Blisters full of black powder on leaves and bulbs. Water drills when sowing with formalin, 1/4 pint in 4 gal. water.

LETTUCE

MILDEW

Give good ventilation and use resistant varieties.

GREY MOULD

Rotting at soil level. Dust with TCNB and do not allow to wilt at any time.

MOSAIC

Prevent aphid infestations, especially from previous crops.

MARROW

MOSAIC

Young plants showing yellow mottling should be destroyed.

ONION

MILDEW

Serious — spray with zineb.

WHITE ROT

White fungus destroys roots — treat drills when sowing with 4 per cent Calomel Dust, l oz. To 10-ft. drill, or TCNB dust.

SMUT

Blisters full of black powder on leaves and bulbs. Water drills when sowing with formalin 1/4 pint in 4 gal. water.

VIRUS

Stripe. Serious in shallots. Get a new stock. Not so serious in onions except in bulbs kept for a seed crop.

PEA

FOOT ROT

Change the site each season.

POTATO

DRY ROT

Shrivelling of seed tubers — do not plant infected stock.

BLACKLEG

In June base of stem blackens and leaves yellow. Not a serious disease.

VIRUS

Several serious ones. Avoid by planting fresh Scotch seed at least every 2 years.

RHUBARB

CROWN ROT

Black rotten areas below crown. Change site and get fresh sets.

SHALLOT (see Onion)

SWEDE

VIRUS

Young leaves are yellow, thickened and stunted.

MILDEW

Can be serious. Spray with Karathane for small areas.

SWEET CORN

SMUT

Some grains swollen and full of black powdery spores. Cut out and burn infected parts while young.

TOMATO

STEM ROT

Remove affected plants and spray with captan.

GREY MOULD

Reduce the humidity and dust the plants with TCNB.

WILT

Mound up soil round stem base and shade plants.

BLIGHT

Symptoms the same as potato blight. Appears on outdoor plants only. Spray with colloidal copper when the plants are ‘stopped’.

VIRUS

Several viruses known causing severe mosaic, streak and malformations. Destroy plants.

FLOWER DROP

Dry soil conditions.

SMALL FRUITS

Poor pollination due to dry air conditions.

BLOSSOM END ROT

In fruits; short of water when young.

CRACKING

Alternate wet and dry conditions.

TURNIP

CLUB ROOT (see Cabbage)

VIRUS

Yellowish-green mottling on leaves. Destroy plants.

06. September 2013 by admin
Categories: Gardening History, Plant Biology, Top Tips | Tags: , , , , , , , , , , , , | Comments Off on VEGETABLE DISEASES

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