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Garden Plant diseases symptoms and remedies.

 

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  Page 22
Garden Plant Symptons - Shoots Distorted or Wilted
 
Apple canker
(Shoots distorted or wilted)
Plants affected:Apples, and less commonly pears, beeches, ash, poplars and sorbus.
Symptoms:
Elliptical cankers, with the bark shrinking in concentric rings until the inner tissues are exposed. Girdling of the shoots or branchs by the canker causes die-back.
Apple canker. Picture of infected plant
Treatment:
 Cutout and burn infected spurs and small branches. On larger branches and main trunks, par away all diseased material(which should be burnt) until a clean wound is left. Coat this with a canker paint. In severe cases, spray with Bordeaux mixture just before leaf-fall, when half the leaves have fallen, and at bud-burst. Benomyl sprays to control scab will also control canker. Improve drainage if waterlogging occurs, as this may aggravate the problem-especially on 'Cox's Orange Pippin, 'Lord Suffield', 'James Grieve' and 'Ribston Pippin' apple trees.
 
China aster wilt
(Shoots distorted or wilted)
Plants affected:China asters.
Symptoms:
The plant wilts, usually as it is about to flower. A pink fungal growth may be seen on stems just above ground level
China aster wiltt- Image of affected plant.
Treatment:
Grow resistant varieties on a fresh site. Destroy diseased plants as they appear.
 
Coral spot
(Shoots distorted or wilted)
Plants affected:
Many trees and shrubs, particularly acers, magnolias, red currants, figs.
Symptoms:
Die back of shoots or large branches caused by coral-red, spore filled pustules on dead wood. Sometimes the whole plant dies.
Coral spotl- Image of infected plant.
Treatment: Cut out dead shoots to a point at least 50 to 100 cm. below the apparently diseased area, and burn. Feed, mulch water and/or drain soil as necessary to encourage vigour.
 
Scab
(Shoots distorted or wilted)
Plants affected: Apples and pears.
Symptoms:  Small blister-like pimples develop on young shoots, later burst the bark and the show as ring-like cracks or scabs.
Scab-image of infected plant
Treatment:  Cut out cracked and scabby shoots when pruning. Spray regularly, starting when young flower buds are visible, and until July if necessary, with benomyl, captan or lime sulphur(except on sulphur-shy varieties and pears), thiophanate-methyl or thiram, Start spraying pyracanthus when young leaves are half grown. Rake up and burn all fallen diseased leaves.
 
Poplar canker
(Shoots distorted or wilted)
Plants affected: Poplars, except Populus nigra.
Symptoms:  Unsightly cankers 6mm to 12,5 cm. long erupt on shoots, branches and sometimes the trunk. Die-back of young shoots occurs in early in early summer.
Poplar canker- Image of infected plant.
Treatment: Destroy badly diseased trees. On less severly affected trees cut out and burn cankered shoots. Paint all wounds with a protective paint.
 
 
 
 
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