Method of Mulberry Leaf Utilization for Rearing Single Cross Hybrid Silkworm

Abstract

Four mulberry varieties, Nakornratchasima 60, Burirum 60, BR. 51, BR. 4/2, and a combination, 1:1 ratio, of those varieties were conducted in order to fine suitable mulberry varieties for rearing Japanese F1 hybrid silkworm, KT1 x KT21 at Department of Entomology, Faculty of Agriculture, Chiang Mai University. Randomized complete block design with 3 replications was assigned in three different periods of year, January-February 1995, June-July 1995 and November-December 1995. The greater yield percentages of mounting, cocoons, good cocoons, normal pupae and cocoon shells were obtained from rearing the silkworms with individual mulberry variety of BR. 51, and Nakornratchasima 60. Rearing the silkworms with the mixer of two different mulberry varieties yielded the similar outcome. There was also no significant differrence in rearing times at different periods of the year.