Cocoon time again.

I woke up this morning to find four silkworms making cocoons. That is 30 days since they hatched. That is about a week longer than given in the literature.

The interesting thing is that in two boxes there are two silkworms busily making cocoons; whereas there are none in the other boxes. I am wondering if hormone from one silkworm induces cocoon-making in a neighbour.