Aphids on Shade Trees and Ornamentals Aphids are an extremely common insect in landscapes and gardens. In ornamental plants, shrubs and trees, some aphids cause wilting or leaf curling and excrete a sticky waste product, honeydew that promotes sooty mold growth and...
Emerald Ash Borer, Agrillus planipennis Emerald ash borer is an invasive pest of ash trees. Larvae of this pest feed beneath the bark, eventually killing the tree. Emerald ash borer was found in Boulder, CO in 2013 and is actively spreading. Order: ColeopteraFamily:...
Japanese Beetle, Popillia japonica Japanese beetles have been one of the key insect pests of both turfgrass and landscape plants in the eastern US and now in the Western U.S. These beetles cause significant defoliation and damage to leaves and flowers of many plants. ...
Spotted Lanternfly Lycorma delicatula Order: HemipteraFamily: Fulgoridae Description Spotted lanternfly (SLF) is an invasive planthopper native to Asia. Since it entered the US in 2014, SLF has spread across several eastern states, but it has not yet been detected in...
