Our arborist advice section is the most extensive expert collection of tree, lawn and landscape care tips and educational resources that you will find anywhere.
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Strange, irregularly shaped brown splotches clearly don’t belong on shiny, green tree leaves. Anthracnose is a disease that commonly causes these unsightly spots. Prevent and correct the problem with some tree TLC.
Apple scab is a disease of apple and crabapple trees.
The bronze birch beetle is a destructive beetle larva that feeds on birch trees wakened from drought, poor growing conditions or other insect infestation.
The black vine weevil frequently injures and defoliates taxus, Japanese holly, rhodedendron, azalea and euonymus plants.
The black turpentine beetle is on of five common species of pine bark beetles in the US. It causes considerable damage to stressed pines throughout its range which spreads from coastal New Hampshire to Florida and as far as eastern Texas.
Bagworms are serious pests of shrubs and woody ornamentals. Since their spindle-shaped, protective bags are made of silk, debris and portions of foliage, they're camouflaged and often unnoticed until serious plant damage has occurred.
In large populations, azalea lace bugs can weaken plants and leave reminders of their damage behind. But with some extra care and attention, you can help save your plants from unsightly leaf damage.
Ash leaf rust can be a significant problem in the Mid-Atlantic area and along the New England coast. Leaves, petioles and green twigs become infected during May and June.
The buck moth caterpillar is a serious pest that defoliates oaks, particularly in the New Orleans area. It is found from Maine to Georgia and west to California.