Just started to prick out some very valuable seedlings, in desperate need of doing. Found that a leaf cutting bee has filled the pot with grubs all neatly wrapped in leaves. What can I do? I do not want to kill them but we are talking a lot of money here, if I can get these seedlings to selling size.
I have not done this myself, so someone please correct me if I am wrong.
Get a cardboard toilet roll core and close off one end with a bit of cardboard fixed with duct tape. Put the leaf-wrapped grubs in. Tape or glue Kleenex or toilet tissue over the open end, so that the end is covered by the tissue only, to be a bit porous.
Store the roll/rolls somewhere dry and away from ants, birds, etc, like a shed, over the winter. In spring the chrysalises should produce bees and the bees should get out through the tissue.
The bees are obviously beneficial to the garden but if you don't want the leaf-cutters there, you might want a bee-friendly friend to have the rolls and be the midwife!
For next year, put your pots in a plastic bag so that the bees cannot get into them.
You could provide an alternative with bee houses but you might not be into that!