Integrated effects of diatomaceous earth and corn genotypes on mortality of red flour beetle Tribolium costaneum (Herbst) (Col., Tenebrionidae) in laboratory conditions

Subject Areas : entomology and othea arthropods

M.  Ghasemzadeh ¹ (Department of Entomology, Faculty of Agriculture, Islamic Azad University, Arak, Iran)
F.  Shakhsi Zare ² (Department of Entomology, Faculty of Agriculture, Islamic Azad University, Arak, Iran)
A.  Sabetghdam ³ (Department of Natural Resources, Faculty of Agriculture, Imam Khomeini College, Karaj, Iran)
N.  Baghaei ⁴ (Department of Natural Resources, Faculty of Agriculture, Imam Khomeini College, Karaj, Iran)

Received: 2011-09-18 Accepted : 2012-05-25 Published : 2012-05-21

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Abstract :

The study was done during 2010-2011 to investigate the integrated effects of diatomaceous earth and three genotypes of corn on adults mortality of red flour beetle Tribolium costaneum in laboratory conditions (27°C, 60±5% RH and dark). The adults of red flour beetle fed with three concentrations of diatomaceous earth (0.5, 1 and 1.5 gr/kg) on three genotypes of corn in 4 replications. The mortality of T. castaneum was recorded after 2, 7 and 14 days and compared with control. Results showed that there was significant differences between genotypes and different concentration of diatomaceous earth. The comparison of means showed that 1 gr/kg concentration and KE1728/8 genotype of corn were the best treatment separately. Results of integrated effects showed that percentage of mortality had a significant difference only on 14th days. So 0.5 gr/kg concentration of diatomaceous earth and KE720/12    genotype are recommended as the best integration.