Nutritional indices and activity of digestive proteolytic and amylolytic of Trogoderma granarium (Everts) (Coleoptera: Dermestidae) on diverse rice cultivars

Barzin, Shervin (2019) Nutritional indices and activity of digestive proteolytic and amylolytic of Trogoderma granarium (Everts) (Coleoptera: Dermestidae) on diverse rice cultivars. Masters thesis, University of Mohaghegh Ardabili.

Text Barzin-Msc thesis.pdf Download (946kB)

Abstract

Research Aim: In this research, nutritional indices and activity of digestive proteolytic and amylolytic of Trogoderma granarium were evaluated. Research method: In this research, nutritional indices and activity of digestive protease and amylase of fifth instar T. granarium were investigated on six rice cultivars including Hashemi, Gilane, Shiroodi, Domsiah, Ali-Kazemi and Khazar at laboratory conditions (33±1˚C, relative humidity of 65±5% and a photoperiod of 14: 10 (L: D). Findings: Based on the results, the highest food consumption was observed on cultivar Gilane (1.52 ± 0.04 mg larvae) and the lowest value was observed on cultivars Khazar (0.99 ± 0.05 mg larvae) and Ali-Kazemi (0.99 ± 0.33 mg larvae). The fifth instar larvae fed on cultivar Khazar (0.17 ± 0.03 mg larvae) had the lowest weight gain. The lowest values of efficiency of conversion of ingested food (17.37 ± 3.03 %) and relative growth rate (RGR) (0.007 ± 0.001 mg/mg/day) were on cultivar Khazar. The highest value of relative consumption rate (RCR) was observed on cultivar Gilane (0.065 ± 0.001 mg/mg/day) and the lowest valu was seen on cultivars Khazar (0.040 ± 0.001 mg/mg/day) and Ali-Kazemi (0.041 ± 0.000 mg/mg/day). Also, the larvae fed on cultivar Khazar (0.24 ± 0.04 mg/day) had the lowest growth rate (GR). The highest and lowest proteolytic activity was observed on cultivars Gilane (0.128 ± 0.020 mU/mg) and Khazar (0.034 ± 0.004 mU/mg), respectively. The highest amylolytic activity was observed on cultivar Gilane (0.644 ± 0.009 U/mg) and the lowest value was observed on cultivars Khazar (0.339 ± 0.010 U/mg) and Ali-Kazemi (0.408 ± 0.045 U/mg). Moreover, cultivars Khazar (31.32 ± 0.52 %) and Ali-Kazemi (32.28 ± 0.36 %) had the lowest partical size index. Partical size index of different rice cultivars had significantly a positive correlation with food consumption, RGR, RCR, GR, and protease and amylase activity of larvae. Conclusion: The results of this study demonstrated that cultivar Khazar was an unfavorable host for growth and feeding of T. granarium.

Actions (login required)

View Item