Source: The Great Interpretation of Dreams (Ibn Sirin)
A silkworm in a dream indicates the ruler's subjects and his goodness. It may indicate unlawful money.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
A silkworm indicates a man who strives to seek lawful (halal) earnings. Whoever sees himself raising them will attain goodness and sustenance.
Source: Signs in the Science of Expressions (Ibn Shaheen)
A silkworm is interpreted as goodness. Whoever sees it producing silk will attain goodness from a ruler.