Find Insects & Arthropods conditions by symptom
Pick a symptom you've noticed and review the related conditions.

Black spots or patches appear on the elytra, pronotum, or head
- Black Spot DiseaseConsider consulting a specialist store within a few days
Blue, green, or black mold has developed on the surface of fungal blocks or substrate
- Mold and Bacterial Contamination of SubstrateMonitor; consult a specialist store if it worsens
Decreased activity and loss of appetite may accompany the condition
- Oviposition Failure (Egg-Laying Failure)Consider consulting a specialist store within a few days
Dense white powdery mite clusters are visible on the inner walls and lid of the enclosure
- Grain Mite InfestationConsider consulting a specialist store within a few days
In adults, a lymph-like secretion may be observed near the affected area
- Black Spot DiseaseConsider consulting a specialist store within a few days
Larvae come to the walls or surface of the fungal block and refuse to burrow back in
- Mold and Bacterial Contamination of SubstrateMonitor; consult a specialist store if it worsens
Larval feeding marks (frass tunnels) have decreased significantly
- Mold and Bacterial Contamination of SubstrateMonitor; consult a specialist store if it worsens
Loss of appetite or reduced activity may be observed
- Nematode InfestationMonitor; consult a specialist store if it worsens
Nematodes are attached to the beetle's body surface, especially between abdominal segments
- Nematode InfestationMonitor; consult a specialist store if it worsens
No egg-laying behavior is observed over an extended period after mating
- Oviposition Failure (Egg-Laying Failure)Consider consulting a specialist store within a few days
Numerous thin white or transparent thread-like organisms are visible throughout the substrate
- Nematode InfestationMonitor; consult a specialist store if it worsens
Numerous tiny white mites are attached to the beetle's body, especially around joints and abdominal segments
- Grain Mite InfestationConsider consulting a specialist store within a few days
Part of the pupa turns black with suspected tissue necrosis
- Black Spot DiseaseConsider consulting a specialist store within a few days
Some or all claws or tarsal segments at the tips of the legs are missing
- Tarsal Loss (Claw and Tarsus Damage)Monitor; consult a specialist store if it worsens
The abdomen appears swollen and distended, suggesting retained eggs
- Oviposition Failure (Egg-Laying Failure)Consider consulting a specialist store within a few days
The adult beetle moves restlessly around the enclosure
- Nematode InfestationMonitor; consult a specialist store if it worsens
The adult beetle remains on the substrate surface and moves restlessly without burrowing
- Grain Mite InfestationConsider consulting a specialist store within a few days
The adult beetle remains on the substrate surface rather than burrowing
- Mat Spoilage-Induced AnorexiaMonitor; consult a specialist store if it worsens
The affected area appears sunken or is clearly different in color from surrounding cuticle
- Black Spot DiseaseConsider consulting a specialist store within a few days
The beetle cannot climb bark or perches and falls easily
- Tarsal Loss (Claw and Tarsus Damage)Monitor; consult a specialist store if it worsens
The beetle drags a leg or shows an abnormal gait
- Tarsal Loss (Claw and Tarsus Damage)Monitor; consult a specialist store if it worsens
The beetle moves continuously due to mite irritation
- Grain Mite InfestationConsider consulting a specialist store within a few days
The beetle refuses food or shows a marked decrease in food consumption
- Mat Spoilage-Induced AnorexiaMonitor; consult a specialist store if it worsens
The beetle stops moving mid-eclosion with remnants of the pupal shell still attached
- Eclosion Failure (Molt Failure)Consider consulting a specialist store within a few days
The body appears deformed or the abdomen appears shrunken
- Eclosion Failure (Molt Failure)Consider consulting a specialist store within a few days
The damaged area appears reddened or shows oozing of body fluid immediately after injury
- Tarsal Loss (Claw and Tarsus Damage)Monitor; consult a specialist store if it worsens
The elytra are twisted or fail to close completely
- Eclosion Failure (Molt Failure)Consider consulting a specialist store within a few days
The female gnaws or digs at the egg-laying log or substrate but does not lay eggs
- Oviposition Failure (Egg-Laying Failure)Consider consulting a specialist store within a few days
The hind wings remain exposed outside the body and harden in that position
- Eclosion Failure (Molt Failure)Consider consulting a specialist store within a few days
The substrate emits a fermentation odor (alcohol or sour smell)
- Mat Spoilage-Induced AnorexiaMonitor; consult a specialist store if it worsens
The substrate or fungal block emits a foul or putrid odor
- Mold and Bacterial Contamination of SubstrateMonitor; consult a specialist store if it worsens
The temperature inside the enclosure is elevated due to heat from re-fermentation
- Mat Spoilage-Induced AnorexiaMonitor; consult a specialist store if it worsens