Tree Health in Arizona
A comprehensive state guide for Arizona is coming soon. Below are current tree health alerts tracked for this state.
View all Arizona alertsCurrent Threats in Arizona
Ips Bark Beetles
INSECTA 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.
Powdery Mildew
FUNGUSA 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.
Thousand Cankers Disease
DISEASEA disease complex involving the walnut twig beetle and an associated fungus that has caused significant mortality of black walnut, particularly in western states. Thousands of small cankers coalesce to girdle branches and the trunk.
Red Admiral
INSECTSeemed to be warming its wings in a patch of sun in the middle of the sidewalk, where I accidentally disturbed it while walking by. It landed on me and hung out for a little bit before I encouraged it to disembark, and it continued on with its business.
Graphocephala cythura
INSECTGraphocephala cythura observed in the wild. Research-grade iNaturalist observation.
Jacaranda Helmet Stinkhorn
FUNGUSJacaranda Helmet Stinkhorn observed in the wild. Research-grade iNaturalist observation.
Asian Longhorned Beetle Damages hardwood trees by tunneling deep into trunks and branches
INSECTAsian Longhorned Beetle Damages hardwood trees by tunneling deep into trunks and branches - identified by USDA APHIS as a pest threat.
Four-spotted Collops
INSECTFour-spotted Collops observed in the wild. Research-grade iNaturalist observation.
Lesser Triceratops Beetle
INSECTThought it was a death feigning beetle because it had completely stopped moving even when flipped over. Neat find
Four-patched Bird-dropping Moth
INSECTFour-patched Bird-dropping Moth observed in the wild. Research-grade iNaturalist observation.
Cottonwood Stag Beetle
INSECTTons of dead ones saw 4 alive, three of the four were males and two of them were fighting
Red-necked Pachy
INSECTRed-necked Pachy observed in the wild. Research-grade iNaturalist observation.
Western Poplar Sphinx
INSECTWestern Poplar Sphinx observed in the wild. Research-grade iNaturalist observation.
North American Common Water Strider
INSECTThe 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!
Great Ash Sphinx
INSECTGreat Ash Sphinx observed in the wild. Research-grade iNaturalist observation.
Large Milkweed Bug
INSECTCluster of black and orange insects on milkweed plant. Warm, near sunset, slightly overcast.
Black Death-feigning Beetle
INSECTBlack Death-feigning Beetle observed in the wild. Research-grade iNaturalist observation.
Doll's Sphinx
INSECTDoll's Sphinx observed in the wild. Research-grade iNaturalist observation.
Psilocybe aztecorum
FUNGUSPsilocybe aztecorum observed in the wild. Research-grade iNaturalist observation.
Citrus Cicada
INSECTFound on mesquite tree, cicadas have been living in it and making their signature buzzing sound for several weeks now. However, it’s become significantly more prominent this week with the onset of the monsoonal storm activity. We are currently watching a storm roll in, and the cicadas seem to get much more active with higher humidity and dew points. The buzzing gets much louder in the evening, particularly as storm clouds move in. They’re still loud on clearer days, but seem to be more so on s