If soil testing has revealed a potassium deficiency, apply a potassium fertilizer and water well. Avoiding excess fertilization in the first place is the best approach. However, keep in mind that fertilizer runoff is an environmental pollutant. If fertilizer burn is to blame, irrigate the soil deeply to flush out excess fertilizer salts. Protect trees from severe root damage of nearby construction and excavation. Check the root collar for girdling or circling roots that strangle the trunk and limit water and nutrient movement. Mulching the root zone (preferably with wood chip mulch) helps retain moisture, reduce evaporation, and promotes a healthy, functional root environment that is critical for water movement to the leaves. Solutions: The solution to leaf scorch will depend on the cause, however, in general all cultural care methods that improve plant health and root functionality will reduce symptoms. An infected plant will likely die within ten years. Antibiotic injections applied by a professional can reduce symptoms for a season, however, the above cultural management methods are the best options to reduce symptoms and prolong life. If your plant has bacterial leaf scorch, there is no cure.Severely affected twigs may be removed using a pair of sharp and sanitized pruning shears, as weakened branches are susceptible to secondary infections.Even if you have enough potassium in the soil, plants will not be able to take it up if the soil is consistently too dry. If soil testing has revealed a potassium deficiency, apply a potassium fertilizer and water well.If fertilizer burn is to blame, irrigate the soil deeply to flush out excess fertilizer salts.Protect trees from severe root damage of nearby construction and excavation.Check the root collar for girdling or circling roots that strangle the trunk and limit water and nutrient movement.Mulching the root zone (preferably with wood chip mulch) helps retain moisture, reduce evaporation, and promotes a healthy, functional root environment that is critical for water movement to the leaves.The solution to leaf scorch will depend on the cause, however, in general all cultural care methods that improve plant health and root functionality will reduce symptoms. If your plant has bacterial leaf scorch, there is no cure.
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