S. Atanasova, M. Panayotov, D. Pavlov, M. Duleva Abstract. For the needs of the experiment excreta age five of silkworms (populations of the monovoltine crossbreds of Bombyx mori L. Super1хХеса2, 19х1014 and 1013х1014) raised in spring have been used. Spectral measurement (NIR spectro