How do I gutload silkworms to boost their nutritional values (esp Ca) ?......, simple, feed them fresh mulberry leaves or chow , these have a Ca = 10, see https://www.tandfonline.com/doi/full/10.4081/ijas.2013.e36
see table 2The chemical composition of mulberry leaves is comparable with those of leguminous forages and trees such as lucerne and leucaena (Smith, 1994 SmithO.B. 1994. Using fodder from trees and shrubs to feed livestock in the tropics. Better Farming Series N. 42. FAO Publ., Roma, Italy.[Google Scholar]; FAO, 1998 FAO, 1998. Tropical feeds, 8th ed. FAO Publ., Roma, Italy.[Google Scholar]), especially the protein content. The ratio of Ca in mulberry leaves was found to be 10:1,