Silkworm Bombyx mori L is a highly sensitive lepidopteron insect and responds sharply to changes in the feed quality. In Silkworm rearing, Chawki is considered as one of the important stages from which a successful cocoon crop is ensured. Rearing of silkworm on SeriNutrid Semi-synthetic diet) containing balanced nutrition, during the chawki stage ensures a successful and economically viable cocoon crop. Chawki rearing with SeriNutrid also means hygienic rearing, avoiding loss of crop due to missing larvae & minimizing disease outbreak and reduction in feeding frequency. This hypothesis is tested by extensive trial in the field by promoting chawki (Cake- Mari) obtained by feeding larvae on SeriNutrid cake. Weight of cocoon per 100DFL recorded 3-5% more than leaf chawki rearing and showed better quality of the cocoon, bringing in 5-10% higher price compared to cocoon obtained from leaf fed chawki.