Causes pinching and shrinking of stem just below the bud.
BEAN, DWARF AND RUNNER
Brown spotting on stems and pods often due to infected seed. Change site.
Frequently due to planting too often on same site.
Mosaic can be carried on the seed. Destroy infected plants.
Thickened, swollen roots preventing good growth. Apply lime for brassicas.
Brown spots with concentric rings.
Not usually a serious disease.
Common but rarely serious. Yellow patches on leaves. Spray young plants with zineb and do not allow them to suffer dryness of.
Several kinds, some infecting flower crops such as wallflower, stocks and candytuft. Destroy first affected plants. Keep down aphids.
Spray colloidal copper at half strength.
Mosaic green mottling in leaves. Destroy affected plants when young. Keep down insects.
Young fruits wither through weakness due to faulty cultivation.
Blisters full of black powder on leaves and bulbs. Water drills when sowing with formalin, 1/4 pint in 4 gal. water.
Give good ventilation and use resistant varieties.
Rotting at soil level. Dust with TCNB and do not allow to wilt at any time.
Prevent aphid infestations, especially from previous crops.
Young plants showing yellow mottling should be destroyed.
Serious — spray with zineb.
White fungus destroys roots — treat drills when sowing with 4 per cent Calomel Dust, l oz. To 10-ft. drill, or TCNB dust.
Blisters full of black powder on leaves and bulbs. Water drills when sowing with formalin 1/4 pint in 4 gal. water.
Stripe. Serious in. Get a new stock. Not so serious in except in bulbs kept for a seed crop.
Change the site each season.
Shrivelling of seed tubers — do not plant infected stock.
In June base of stem blackens and leaves yellow. Not a serious disease.
Several serious ones. Avoid by planting fresh Scotch seed at least every 2 years.
Black rotten areas below crown. Change site and get fresh sets.
SHALLOT (see Onion)
Young leaves are yellow, thickened and stunted.
Can be serious. Spray with Karathane for small areas.
Some grains swollen and full of black powdery spores. Cut out and burn infected parts while young.
Remove affected plants and spray with captan.
Reduce the humidity and dust the plants with TCNB.
Mound up soil round stem base and shade plants.
Symptoms the same as potato blight. Appears on outdoor plants only. Spray with colloidal copper when the plants are ‘stopped’.
Several viruses known causing severe mosaic, streak and malformations. Destroy plants.
Dry soil conditions.
Poor pollination due to dry air conditions.
BLOSSOM END ROT
In fruits; short of water when young.
Alternate wet and dry conditions.
CLUB ROOT (see Cabbage)
Yellowish-green mottling on leaves. Destroy plants.