Pests & Diseases


Bagworm: The larvae feed on some 120 species of woody ornamentals-deciduous shrubs and trees as welt as conifers.

Black Spot

Black spot is the most serious and widespread disease of roses, thriving wherever there is adequate humidity and rainfall.

Wild Garlic

The garlic aroma of crushed or mowed leaves readily identifies this introduced weed.

Black Vine Weevil

Introduced from Europe, the black vine weevil (Otiorhynchus sulcatus) is a widespread pest in the northern half of the United States, where it attacks a wide variety of landscape shrubs, especially evergreens such as rhododendrons, hemlocks, and yews.

Fairy Ring Fungi

The sudden appearance of mushrooms on the lawn can sometimes seem magical, especially when they are arranged in a circle. These so-called fairy rings may be a foot in diameter or 100 feet across. They typically enclose darker green grass.

Blossom End Rot

This common affliction of tomatoes is the result of a physiological disorder rather than a disease. First described over a century ago, blossom end rot is linked to low levels of calcium in the young fruits as well as to …

Eastern Mole

The eastern mole (Scalopus aquaticus) can be found from Ontario to Florida. Of the seven species of moles present in the United States, it is the most widespread, and the one that is most likely to disrupt lawns and landscapes with its tunneling.