Study of Pubescence in Different Matuirity Level of Leaves in Different Mulberry Varieties

The present study was conducted on number, length and the pattern of pubescence in different maturity level of leaves in different improved mulberry varieties i.e., S 1 , S 1635 and also in a local variety which are commonly cultivated in various parts of West Bengal. The study reveals that density of pubescence is more in tender leaves, but the pubescence in tender leaves is immature in stage. Tip of pubescence is blunt in case of tender leaves. Length of pubescence is increased and tip of pubescence is sharp and pointed in case of mature leaf. Length of pubescence is less in S 1635 variety in all types of leaves as compared to that the local and S 1 varieties. But in case of local variety pubescence is longest. Tip of pubescence is found more sharp in case of local variety and less sharp in case of S 1635 variety. This result indicates that among these three varieties insects prefer to feed S 1635 variety in terms of pubescence study. On the other hand, due to presence of immature and blunt type of pubescence, tender leaves are more favourable and palatable for silkworm larvae.