iNaturalist:
This shade-loving aster is popping up everywhere right now
iNaturalist:
Invasive buckthorn is surging in sightings across yards and woods
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Jewelweed sightings surge as this native wildflower hits ...
iNaturalist:
Common milkweed sightings are surging on nature apps right now
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Pokeweed sightings spike as its purple berries stand out now
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New England aster is blanketing meadows and roadsides right now
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This toxic native woodland flower is blooming everywhere ...
iNaturalist:
Common roadside weed confirmed growing in Columbus neighborhood
iNaturalist:
This shade-loving aster is popping up everywhere right now
iNaturalist:
Invasive buckthorn is surging in sightings across yards and woods
iNaturalist:
Jewelweed sightings surge as this native wildflower hits ...
iNaturalist:
Common milkweed sightings are surging on nature apps right now
Larval deltamethrin exposure causes severe cross-stage carryover toxicity and male reproductive failure in Osmia cornifrons.
PubMed · 2026-06-17
A pesticide sprayed on orchards leaves lasting damage in mason bees even when larvae are exposed to trace amounts — reducing sperm count, viability, and female survival, and making adult bees more vulnerable rather than tolerant when re-exposed.
1
Larval exposure to 10 ppm deltamethrin caused over 50% mortality before adulthood in Osmia cornifrons mason bees.
2
Even the lowest dose tested (0.001 ppm, far below typical field concentrations) caused significant reductions in male sperm abundance and viability that persisted into adulthood.
3
Female emergence declined at all exposure levels, skewing sex ratios increasingly male — a signal of population-level risk since females drive reproduction.