Abstract

PRIETO-ABREU, Marlene; DIAZ-SOLARES, Maykelis; PEREZ-HERNANDEZ, María del Carmen  and  MARTIN-PRIETO, Dayron. Influence of three Morus alba L. varieties on the growth of Bombyx mori L. Pastos y Forrajes [online]. 2016, vol.39, n.3, pp.132-137. ISSN 0864-0394.

Three Morus alba varieties (tigreada, universidad and yu-62) were studied in order to determine their proximal composition and their incidence on the growth of Bombyx mori larvae, polyhybrid Chul Tai-6. For the analysis and feeding mature leaves were used, and the dry matter, moisture, crude fiber (CF), calcium (Ca), phosphorus (P), potassium (K) and ash were determined. The design was completely randomized (three replications of 100 silkworms per variety). The weight of the larva on the first and fifth days of the fifth instar and the average growth of a worm per day were measured. The moisture and CP percentages were higher for var. yu-62 (75,9 and 20,10 %, respectively); there were no significant differences among the CF percentages. Var. tigreada showed significantly high values of ash. The larvae fed yu-62 showed the highest relative growth rate RGR (638,95^a ± 114,2), while the lowest RGR was obtained with tigreada (466,59^c ± 87,97). It is concluded that variety yu-62 showed the best bromatological indicators and a higher RGR, for which it is recommended to be used in Cuban sericulture.

Keywords : silkworm; leaves; minerals.

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