Sudden Oak Death is the name for a disease caused by Phytophthora ramorum. This recently introduced non-native pathogen has killed thousands of oak trees in 14 coastal counties in California alone. The disease can be moved long distances quickly in infected plants, and professionals use phosphonate fungicide for both sudden oak death prevention and infected oak tree treatment.
If you notice holes in tree trunk and branches, there can be an infestation of a wood boring beetle. Tree borers are small insects that burrow into trees, causing severe damage to the tree’s structure and health. These pests are difficult to control and can quickly destroy a tree if left unchecked.
The Magnolia is a beautiful tree with blooms as big and bright as the leaves on its thick, lush branches. However, Magnolias are also unfortunately prone to infestation by the Magnolia scale. They feed on the sap of Magnolia trees, causing significant damage to the tree if left untreated. This feeding can cause extensive damage to the tree, including dieback of branches, leaf yellowing, drop, and stunted growth. In severe cases, Magnolia scale infestation can even kill the tree.
Bot Canker or Botryosphaeria dothidea is a fungus that often affects various types of woody shrubs and trees and can cause extensive dieback. This pathogen invades through wounds in the bark, causing the formation of cankers. The cankers then expand and girdle twigs, branches, and even the trunk, leading to the eventual decline of the plant. Botryosphaeria dothidea is just one of many species of canker-causing fungi.
The wide range of native and ornamental plants in California often fall victim to leaf spots. Fungi, bacteria, or even environmental stressors cause spots on leaves. While they may look unsightly, most leaf spot diseases are relatively harmless to the overall health of the plant. However, some leaf spot diseases can cause significant damage if left untreated.
A healthy and vibrant tree needs proper tree care and attention to keep stress at bay. Unwanted infestation and lack of care or nourishment can diminish health and vibrancy. So, whether the leaves, the trunk, or roots show signs of distress, your trees need help. But how to help a sick tree to retain its healthy growth?