Insect identifier · Chiggers and mites
How to identify a Straw itch mite
Pyemotes tritici
· Also called hay itch mite, grain mite, pyemotes, hay itch, itch after moving hay
Itch after moving hay bales or straw décor is often straw itch mites, not chiggers. Welts are more scattered on the trunk.
Itch after moving hay, straw décor, or dried flowers: think Pyemotes, not a hike chigger. Welts scatter on the trunk. Shower, change clothes, isolate the hay. The mite is gone; the itch stays. Christmas straw centerpieces have caused whole-family outbreaks. Chiggers wait at sock lines after grass.
What does a straw itch mite look like?
Microscopic. The exposure history (hay, grain, dried flowers) is the ID.
Straw itch mite (Pyemotes tritici) is Microscopic. Colors people notice: tan. Field marks: Itch after handling hay bales or wheat straw décor; You will not see the mite; Welts under clothing after barn or harvest work. It is found both. If those marks are missing, open Chigger, Bed bug before you force this name. Search phrases that belong on this page include what a straw itch mite looks like and straw itch mite identification.
Identification marks
- Itch after handling hay bales or wheat straw décor
- You will not see the mite
- Welts under clothing after barn or harvest work
Size: Microscopic
Colors: tan
Where: both
What a typical straw itch mite bite looks like
Scattered itchy welts on trunk and arms after hay. Can look alarming. Shower, change clothes, find the source.
People searching “straw itch mite bite identification” want the pattern, not a single anonymous bump. Scattered itchy welts on trunk and arms after hay exposure. Can look like chickenpox to the alarmed. Immediate steps on this page: Shower, change clothes, wash clothes; Soothe itch; If widespread and miserable, a clinician can help with symptom control; Find the hay/straw source. This species does bite or sting people. Fever, spreading redness, trouble breathing, or a child with many stings is professional care.
If you were bitten
- Shower, change clothes, wash clothes
- Soothe itch
- If widespread and miserable, a clinician can help with symptom control
- Find the hay/straw source
Straw itch mite vs Chigger
Hay bales, straw décor, grain. Welts on the trunk after handling plant material. Chiggers are sock-line after grass. If the Christmas straw décor itches the whole family, this mite is on the list.
- Chigger identification (Eutrombicula alfreddugesi)
- Bed bug identification (Cimex lectularius)
- Oak leaf itch mite identification (Pyemotes herfsi)
Range and season
Harvest and when straw decorations are used, continent-wide.
Farms, fairs, and homes with straw decorations, harvest season especially.
Wherever people handle infested hay, straw bales, or stored grain.
Harvest and when straw decorations are used
Common questions
Why do I itch after moving hay?
Straw itch mites prey on insects in hay and will bite people who handle infested bales.
Chiggers or hay mites?
Chiggers: grass, sock lines. Straw mites: hay/grain handling, more scattered trunk welts.
Do they live on people?
No. They bite and leave.
Straw itch vs chiggers?
Straw itch: handling hay or dried plants, scattered trunk welts. Chiggers: grass, clothing lines.