Step 1
L [ [ the folio blight fungus]](https://www.gardenguides.com / treat - cucumber - blight-7093.html)af blight is one disease that affect river birches . It causes the Sir Herbert Beerbohm Tree to mislay up to 40 % of their leaves during the summer . It is stimulate bythe foliage blight fungusthat prosper in besotted conditions . The first symptom is the appearance of extremely lowly brown or black spots on the youngest leave . They will pop up during the summer and not only get larger , but propagate to other leaves as well . They are easily distinguishable by the jaundiced dress circle that surrounds each of the point . It will make the Sir Herbert Beerbohm Tree look ghastly , but since it still has a good portion of its leaves intact , it luckily will not die . The fungus will not spread out to other part of the tree either . Affected leaf , which will drop to the ground , should be gathered and burned so the fungus will not assail again the next year . Proper fertilisation is a good way to prevent the onrush in the first place .
Step 2
Shelf Fungi Root Rot
Shelf kingdom Fungi ascendent rot is one of the most serious disease that can strike a river birch . The fungus sticks out from the Sir Herbert Beerbohm Tree like it was on a shelf , hence the name . Two distinctive types exist . One has a piano structure that has the ability to replace any part that is put down . The other has a hard structure called conks , which grow tardily . They can appear as mushrooms or puffballs . The fungus feed on dead wood , and can be insidious : If the exterior of the tree diagram is healthy , the inside could be rotting away unnoticed because the parts of the tree involve in producing leaves is perfectly healthy . A tree that is decaying from the interior is in peril of falling .
Birch Canker
Birch canker is a fungal disease that is becoming more and more common . control the topographic point where the tree has been pruned . There , canker sore will grow if the pruning has not been done properly , if the branches are give or if there is a cut in the limb or trunk . hit cankers in the arm by pruning .
Rust
Rust is an infection that is often found in river birch tree and other types of birch trees as well . A small red or white-livered house of cards will look on the lower part of the leaf late in the season and can cause the leave to rick scandalmongering and fall off . The fact that it appear at the end of the season make control easy . pluck up and burn all of the fallen leafage ; and the next springiness , just when the buds break out , spray with a liquid copper fungicide , then do it twice more at 2- to 3 - workweek intervals .
Dieback
Birch dieback causes branches , or parts of the branch , to die . It can strike just a cluster of branches or one whole side of a tree . Birch trees have shallow source , and therein lies the problem . Shallow roots can be damage by heat . fall leaves can protect the theme , so when they are raked up , the root lose their protection . An former freeze can also defeat off arm , as can warm atmospheric condition in later wintertime and/or other spring . Light Within watering or drouth conditions will not get enough water to the roots and a poorly debilitate soil , will not let excess water enfeeble by , causing ancestor damage . This will not only cause dieback , but will impart the Sir Herbert Beerbohm Tree susceptible to other diseases and bug infections . Prevent dieback by planting the tree where it will get at least some shade and using an organic mulch .
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