TreeIssues

Wyoming

22 active alerts in this region

TreeIssues monitors plant and tree health threats across Wyoming. Below you will find current alerts for pests, diseases, fungi, and invasive species that have been detected in the state. Alerts are sourced from USDA, USFS, and Wyoming state agricultural agencies. Each alert includes severity ratings, affected species, symptoms, and recommended treatments.

Mountain Pine Beetle

CRITICAL
Insect

A native bark beetle responsible for massive die-offs of lodgepole, ponderosa, and whitebark pines across western North America. Climate change has expanded its range northward and to higher elevations. Outbreaks have affected tens of millions of acres.

Affecting 9 regions

Dutch Elm Disease

CRITICAL
Disease

A devastating vascular wilt disease spread by elm bark beetles that has killed millions of American elms since the 1930s. The fungus blocks water-conducting vessels, causing rapid wilting. It fundamentally changed the American urban landscape.

Affecting 45 regions

Cytospora Canker

HIGH
Fungus

A common fungal disease of spruce and other conifers that causes branch dieback, typically starting from the lowest branches and progressing upward. Colorado blue spruce and Norway spruce are especially susceptible. The fungus enters through wounds or stressed tissue. White resin bleeding on bark is a hallmark sign. Stressed trees are most vulnerable.

Affecting 25 regions

Bronze Birch Borer

HIGH
Insect

A native North American wood-boring beetle that attacks birch trees, especially paper birch and European white birch in landscape settings. Larvae feed under the bark in a serpentine pattern, disrupting nutrient and water transport. Dieback starts at the top of the crown and progresses downward, the opposite pattern of many other pests.

Affecting 26 regions

Ips Bark Beetles

MODERATE
Insect

A genus of bark beetles that attack stressed and weakened pines throughout North America. While they typically colonize dying trees, drought and overcrowding can trigger outbreaks that kill healthy timber.

Affecting 19 regions

Purple Tiger Beetle

MODERATE
Insect

Purple Tiger Beetle observed in the wild. Research-grade iNaturalist observation.

Affecting 3 regions

Asian Longhorned Beetle Damages hardwood trees by tunneling deep into trunks and branches

MODERATE
Insect

Asian Longhorned Beetle Damages hardwood trees by tunneling deep into trunks and branches - identified by USDA APHIS as a pest threat.

Affecting 50 regions

Drowsy-eyed Sphinx

MODERATE
Insect

Drowsy-eyed Sphinx observed in the wild. Research-grade iNaturalist observation.

Affecting 2 regions

Modest Sphinx

MODERATE
Insect

Modest Sphinx observed in the wild. Research-grade iNaturalist observation.

Affecting 7 regions

Punctured Tiger Beetle

MODERATE
Insect

Punctured Tiger Beetle observed in the wild. Research-grade iNaturalist observation.

Affecting 27 regions

King Bolete

MODERATE
Fungus

4500' My first impression was that it was infected with bolete mold (*Hypomyces chrysospermus*) but at closer inspection, it appears to be just an odd shaped king bolete (*Boletus edulis*). Was very firm to the touch. Found several more *B. edulis* nearby

Affecting 8 regions

North American Common Water Strider

MODERATE
Insect

The AC in the office wasn't working too great, so I shuffled over to the library in Cedar Hill to finish doing some work. Took a break a walked around -- some awesome wildlife habitat around the library!

Affecting 22 regions

Seven-spotted Lady Beetle

MODERATE
Insect

Found on a small green patch by a local freeway offramp, Happily foraging for aphids and mealybugs alongside H. axyridis, H. convergens and C. sanguinea.

Affecting 34 regions

Many-spotted Tiger Moth

MODERATE
Insect

Many-spotted Tiger Moth observed in the wild. Research-grade iNaturalist observation.

Affecting 3 regions

Gerrini

MODERATE
Insect

Gerrini observed in the wild. Research-grade iNaturalist observation.

Affecting 4 regions

Harlequin Bug

MODERATE
Insect

On Apios americana. Mustard and cabbage plants were also nearby, but I didn't realize they laid eggs on things other than mustard and cabbage.

Affecting 25 regions

Eastern Boxelder Bug

MODERATE
Insect

All over these specific black walnuts with lots others having none on them. Anyone know why they’d be on walnuts like this?

Affecting 25 regions

Witch's Hat

MODERATE
Fungus

Witch's Hat observed in the wild. Research-grade iNaturalist observation.

Affecting 4 regions

Western Conifer Seed Bug

MODERATE
Insect

Global is over and want to continue including drawings just for regular observations with photo as primary. Is this permitted in non- project observations?

Affecting 26 regions

Lilac Root Weevil

MODERATE
Insect

Lilac Root Weevil observed in the wild. Research-grade iNaturalist observation.

Affecting 4 regions

Giant Water Scavenger Beetle

MODERATE
Insect

Giant Water Scavenger Beetle observed in the wild. Research-grade iNaturalist observation.

Affecting 11 regions

Powdery Mildew

LOW
Fungus

A widespread group of fungal diseases that produce a distinctive white powdery coating on leaves and shoots. It affects hundreds of tree, shrub, and plant species. Unlike most fungi, it thrives in warm, dry conditions with high humidity.

Affecting 49 regions

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