bitch bark

The Bark Barrier

While a few traits characterize the bark of all trees, these protective coverings are remarkably diverse. As with other tree components, such as leaves, branches and roots, every bark is adapted to suit its environment and the life history of the species. Although bark hardly seems as exciting or fascinating as so many other aspects…

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California’s Fall Color

Contrary to popular perception, California does change colors during autumn. While evergreen conifers may dominate portions of the state, the green leaves of many broadleaf species slowly transition from green to yellow, orange or red from September through December. In fact, because of the state’s unique combination of climate and geography, California offers some of…

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How Much Is My Tree Worth?

While it is obvious that trees have considerable ecological, societal, psychological and aesthetic value, it is often difficult to quantify this value. While property owners can estimate the general value of a given tree by using various calculators or formulae, determining a precise figure requires the services of a qualified tree professional. Different Types of…

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The Asian Citrus Psyllid: An Exotic Pest Threatens California’s Citrus Industry

Invasive pests and fungi are some of the deadliest threats to many trees. Because the trees under attack have not evolved mechanisms to combat the alien attackers, significant losses can occur very quickly. Unfortunately, California’s citrus trees are currently under threat from just such a pest, known as the Asian citrus psyllid (Diaphorina citri). First…

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