Abstract
Pollinator exclusion bags for small herbaceous plants are much more convenient to apply and remove if their bottom edge is made in the form of a cloth tunnel loaded with sand to conform to the terrain. Damage and inadvertent selfing of flowers are minimized.
Highlights
A flexible fabric bag, but the open end is not intended to be gathered around the stem
The sandbag-style bottom edge of the bag has a double function: its mass anchors the bag in place, and its flexibility provides for automatic sealing by conforming to irregular contours at the ground surface (Fig 1)
Suitable bags may be sewn from scratch, or existing bags can be given a wide hem to serve as the tunnel for sand
Summary
“Pollination bags” are usually used for this: an open-ended bag of fabric is slid over a shoot and closed by pulling a drawstring or gathering the fabric and using something like a wire tie to keep it snug around the stem. A flexible fabric bag, but the open end is not intended to be gathered around the stem. It is fitted with a wide bottom hem (similar to a wide drawstring tunnel) that is filled with sand or fine gravel.
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