Effect of graded level of nutrients on tree mulberry and it's influence on Silk parameters of FC1 and FC2 breeds of silkworm Bombyx mori L.

This study assessed the influence of various agronomic treatments on tree mulberry and it’s impact on silkworm related parameters such as cocoon shell ratio, filament length, filament weight, and denier in silkworm breeds FC 1 and FC 2. Applying farmyard manure (FYM) at 40 t/ha/yr achieved the highest cocoon shell ratio, with values of 20.13% in FC 1 and 22.56% in FC 2. The optimal treatments also enhanced filament length, with the maximum measurements of 1147.36 m in FC 1 and 1320.07 m in FC 2 observed under the combination of 40 t FYM/ha/yr, 125% RDF, and foliar spray. Filament weight was similarly highest with these treatments. Denier values were notably high, reaching 3.35 in FC 1 and 2.69 in FC 2 under the most effective treatments. The results underscore the significant benefits of combining FYM, RDF, and foliar sprays for improving silk production, with notable differences in the response between the two breeds.