Houston tree pollen increases slightly, mold, weed, grass, effectively flat from Wednesday

Houston Pollen Changes:

• Tree pollen total increased by 30 units, representing a 52% rise from Apr 24 to Apr 25.

• Grass pollen total increased by 4 units, corresponding to a 40% rise from the previous day.

• Weed pollen total decreased by 2 units, showing a slight reduction of 6% from Apr 24.

Houston Mold Changes:

• Overall mold total decreased by 956 units, indicating a 12% reduction from the previous day.

Specific Species Changes:

• Among tree species:

  • Carya (Hickory/Pecan) pollen significantly increased by 52 units, showing a notable 260% rise.

  • Other Tree pollen increased by 2 units, representing a 50% increase.

  • Morus (Mulberry) pollen decreased by 6 units, showing a 100% reduction.

  • Pinaceae (Pine) pollen decreased by 6 units, representing a 75% reduction.

  • Quercus (Oak) pollen decreased by 12 units, reflecting a 75% reduction.

  • Salix (Willow) pollen decreased by 2 units, showing a 100% reduction.

  • Ulmus (Elm) pollen increased by 2 units, indicating no percentage change.

  • Other Tree pollen increased by 2 units, representing a 50% increase.

• Among weed species:

  • Plantago (Plantain) pollen decreased by 4 units, reflecting a 15% reduction.

  • Rumex (Sheep Sorel) pollen decreased by 2 units, showing a 50% reduction.

  • Other Weed pollen increased by 4 units, indicating a 100% rise.

• Among mold species:

  • Basidiomycetes mold significantly increased by 1175 units, representing a substantial 211% rise.

  • Cercospora mold increased by 42 units, showing a 420% rise.

  • Penicillium/Aspergillus mold increased by 81 units, reflecting a 77% rise.

  • Other mold species showed reductions (e.g., Cladosporium, Alternaria, and Oidium/Erysiphe) or remained unchanged (e.g., Rust, Curvularia).