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1 December 2015 Life Table Parameters and Digestive Enzymatic Activity of Plodia interpunctella (Hübner) (Pyralidae) on Artificial Diet Containing Bran of Various Wheat Cultivars
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Abstract

The eggs and larvae of the Indian meal moth, Plodia interpunctella (Hübner), are widely used for mass rearing of parasitoids and predators. Life table parameters and digestive enzymatic activity (protease and α-amylase) of P. interpunctella were studied on bran of different wheat cultivars (‘Backcross Roshan’, ‘Khooshe Pishgam’, ‘Khoshki line 9’, ‘Arg’, ‘Alvand’, ‘Pishtaz’, ‘WS-89-2’, ‘Sepahan’ and ‘Bam’) when incorporated into artificial diets under laboratory conditions (25 ± 1°C, 65 ± 5% R.H., and a 16:8 h light-dark photoperiod). The net reproductive rate (R0) of P. interpunctella was highest on ‘Backcross Roshan’ (78.05±4.80 female/ female/generation) and lowest on ‘Pishtaz’ (21.82±0.96 female/female/generation). The intrinsic rate of increase (rm) ranged from 0.0520±0.0006 to 0.0836±0.0008 (day-1), which was lowest on ‘Pishtaz’ and highest on ‘Backcross Roshan’. The highest and lowest levels of proteolytic activity were recorded in the fifth instar larvae fed with ‘Backcross Roshan’ (1.19 ± 0.16 U mg-1) and ‘Bam’ (0.24 ± 0.08 U mg-1). Also, the highest level of amylolytic activity was recorded on ‘Alvand’, ‘Backcross Roshan’, ‘Arg’ and ‘Khoshki line 9’ (0.85 ± 0.02, 0.83 ± 0.09, 0.78 ± 0.05, 0.77 ± 0.04 mU mg-1, respectively) while the lowest activity was on ‘Sepahan’ and ‘Bam’ (0.36 ± 0.06 and 0.43 ± 0.06 mU mg-1, respectively). The results show that, among the different wheat cultivars tested, ‘Backcross Roshan’ was the most suitable cultivar for rearing P. interpunctella, as an alternative host, in order to optimize the mass production of natural enemies.

Bahram Naseri, Roya Nasiri, and Jabraeil Razmjou "Life Table Parameters and Digestive Enzymatic Activity of Plodia interpunctella (Hübner) (Pyralidae) on Artificial Diet Containing Bran of Various Wheat Cultivars," The Journal of the Lepidopterists' Society 69(4), 268-274, (1 December 2015). https://doi.org/10.18473/lepi.69i4.a3
Received: 12 November 2014; Accepted: 15 April 2015; Published: 1 December 2015
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