The odds are stacked against lamb's lettuce in the battle with fungi and insects, especially in conventional agriculture where the delicate plants are grown close together. So farmers are trying to aid the lamb's lettuce with chemical support, and depending on the farm more or less residue remains on the leaves.
"Germany: "Lamb's lettuce contains moderate amounts of crop protection"
The odds are stacked against lamb's lettuce in the battle with fungi and insects, especially in conventional agriculture where the delicate plants are grown close together. So farmers are trying to aid the lamb's lettuce with chemical support, and depending on the farm more or less residue remains on the leaves.