The main host tree of silkworm is

The main host tree of silkworms is Mulberry.
The domestic silk moth is an insect from the moth family Bombycidae. It is the closest relative of Bombyx mandarina, the wild silk moth.
The silkworm is the larva or caterpillar of a silk moth. It is an economically important insect, being a primary producer of silk.
A silkworm's preferred food is white mulberry leaves, though they may eat another mulberry.