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Symptoms and signs of a diseased tree include dying or dead limbs that are brittle and gray in color. The presence of insects such as tent caterpillars feeding on the greenery may also indicate disease.


Some common orange tree diseases, which are common to all citrus trees, include citrus greening, citrus canker and citrus black spot. Another disease that occurs in orange trees is sweet orange scab.


Sudden crown drop, fusarium wilt, diamond scale and pink rot are some of the common palm tree diseases. Palm trees are susceptible to fungal infections.


Identify peach tree diseases by observing the tree, considering weather and other conditions in the past year and consulting an expert. Accurate record keeping can help determine the causes of disease and prevent future outbreaks.


Dog Health Guide and WebMD both offer photos of dog skin diseases and conditions along with information on treatment and prognoses. WebMD offers a slideshow with 19 slides and pictures of dog skin problems, while Dog Health Guide offers an even more comprehensive gallery of skin condition photos.


Some of the most common diseases affecting apple trees include apple scab and powdery mildew. Apple scab appears as warty, brown lumps on the fruit and leaves, while powdery mildew is a velvety covering on the tree's branches and leaves.


Florida Palm Trees, Palmantics and All Types of Palm Trees are websites with pictures of palm trees from around the world. There are over 2,000 types of palm trees. Specific types of palm trees can be found on Google Image or on particular websites dedicated to palm trees.


To identify diseases in maple trees, examine the bark for cankers and lesions, check for signs of girdling roots and analyze the tree to see if verticillium wilt is present. The difficulty of the identification process depends on numerous factors, including the visibility of the symptoms.


Pear trees are susceptible to several diseases caused by fungi, viruses and bacteria. The National Gardening Association reports that fire blight is the most devastating to both commercial and home pear trees in the United States. A bacterial infection spread by rain and insects, fire blight can wip


WebMD and Cat Health Guide are both good sources for finding pictures of feline skin diseases and other skin issues. WebMD offers both a cat skin problems directory of common problems and an 18-slide presentation with multiple skin afflictions pictured. Cat Health Guide offers a photo gallery pictur