ID: 

SLF have piercing and sucking mouthparts that are used to suck sap from the phloem on many tree species, producing an excrement of honeydew as a result. They are approximately 1 - 1 ½ inch long at rest. Forewings have a distinct black and white pok-a-dot pattern, where the hindwings have bright red markings. 

Eggs from this insect are laid in short lines and covered with a clay like substance which resembles a grey mud that can be found on a variety of surfaces. 

Signs and Symptoms: 

These insects are a tree stressor, causing further harm. The preferred host species is the invasive tree-of-heaven (Ailanthus altissima). They swarm on trees causing infestation, and can be grotesque in urban or residential areas. They excrete honey dew from feeding that causes growth of sooty mold which blackens trunk and foliage. This honeydew also attracts stinging insects, which can be a nuisance in residential and recreational areas. Damage from this insect can also cause foliage to yellow. 

Spread and Impacts: 

Spotted lanternfly was first spotted in Berks County, Pennsylvania. They are a hitchhiking species, and tend to infest new areas through eggs being carried to new locations by firewood, cars, or outdoor furniture. They are spread the quickest through human activity. 

These insects can affect a variety of industries. Agriculture, such as grape vineyards and orchards are heavily affected, and can cause products to become expired. Timber harvested from infected areas must be quarantined. Residential areas can be affected by infestations on shade trees. 

Control: 

Some control methods include stopping spread at the source. Smashing eggs and stomping on sight can help slow the spread of the population. As well as some mechanical and chemical applications can be used. Insecticide injections to infested trees will cause sap to be toxic to insects. Foliar spray can also be used. Removing preferred host species such as tree-of-heaven can also be effective.