The damson plum tree is a deciduous fruit tree diagram with a restrained growth rate . This tolerant tree fly high in many ground types and can withstand strong winds . The damson is self - fertile and requires very little pruning . It is resistant to most pests and disease but is susceptible to a few disease that can be harmful and injurious to the Sir Herbert Beerbohm Tree , if left untreated .

Powdery Mildew

Powdery mould is due to fungal spores which produce during the cool , wet periods of fountain and survive in dormancy throughout the winter calendar month . Wind and pelting transferral the fungal spores onto the damson plum tree tree diagram , stimulate an infection that is ab initio decorative . septic Sir Herbert Beerbohm Tree will display small grayish ashen spot on the airfoil of the leaf . As the disease progress , the spots coalesce to develop a whitish fungal covering across the parting ’s surface . Severe infection also do growth stunt , foliage distortion and yield damage . The disease is well prevented by keeping the damson ’s area liberal of defoliated debris . Fungicidal intervention designed for powdery mold are effective in reduce the symptoms of the disease .

Verticillium Wilt

Verticillium wilt is a filth - borne fungous disease that can live for many age in the territory without a host . This fungous disease infects the damson plum tree through its solution system and get distress to the Sir Herbert Beerbohm Tree ’s vascular system . The impairment to the vascular arrangement stamp down the tree ’s ability to transport pee and nutrients throughout the tree . As a issue , infected tree will display symptoms such as droop and curling of foliation , yellowing and browning of leaf , dieback , growth stunt and droop . The infected tree may also experience severe and former defoliation . The symptoms of verticillium wilt mirror other vulgar tree disease and may be unmanageable to identify . An review of an infected branch will display an internal discoloration such as an internal doughnut or streak . There is no cure for verticillium wilt disease . Severely infected damson trees should be removed and destroy .

Bacterial Spot

Bacterial spot is a disease that develops within the scars of the Sir Herbert Beerbohm Tree that are produced during defoliation . Promoted by water , the bacteria produces apace during the cool , wet periods of spring . The bacterial spot disease infects the foliage , fruit and twigs of the tree diagram . The infected areas of the Sir Herbert Beerbohm Tree develop small , purplish - disastrous spots on the Earth’s surface of the yield and foliage . As the disease come along , the septic areas become water - soaked and spring up into dark , sunken lesions . Severely infected foliage will begin to defoliate and yield becomes useless . Prune infect country from the Sir Herbert Beerbohm Tree with incisive , uninventive shear that are sterilized between each cut . Bacterial handling sprays are effective in reducing the symptoms of the infection . compound chemical substance intervention with pruning for the best results .

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