author(s)
Muhammad Waqar Hassan, Moazzam Jamil, Zubaria Muzaffar, Shabnum Naz and Fozia Fakhar

abstract
This study investigated during summer 2015 the comparative population growth and weight loss by Tribolium castaneum Herbst (Coleoptera: Tenebrionidae) and Trogoderma granarium Everts (Coleoptera: Dermestidae) in different wheat byproducts and varieties. Maximum weight loss by T. castenum (1.96±0.008) was in Semolina and minimum (1.00±0.13) in wheat bran. Maximum larvae were in wheat flour (457.25±3.74) and minimum in Semolina (38.75±0.93). Numbers of adults were maximum in wheat bran (41.0±0.41) and minimum in Semolina (33.0±0.41). In wheat varieties minimum weight loss by T. castaneum was in Meraj (0.22±0.028) and maximum in Sehar (3.15±0.20). Maximum larvae were in Sehar (26.50±0.010) and minimum in Merja (21.25±0.09). For T. granarium these parameters were studied only in wheat varieties. Weight loss was more in Fareed (5.87±0.263) and minimum in Meraj (3.22±0.09). Maximum larvae were in Fareed (26.75±0.27) and minimum in Meraj (21.00±0.25). These results are important for the management of these serious storage insect pests.