Pyralid -

: These herbicides are "horribly persistent" and do not break down quickly in manure or compost heaps unless exposed to specific soil microbes over time.

: Gardeners often perform a "bioassay" (a growth test) by planting sensitive seeds like beans in suspected compost to see if they emerge with curled leaves before using the compost on their main garden beds. pyralid

In a gardening context, a "pyralid review" often refers to the evaluation of damage caused by persistent herbicides like and clopyralid . These chemicals are designed to kill broadleaf weeds in grass fields but can survive through composting and even a horse or cow's digestive system. : These herbicides are "horribly persistent" and do