The evaluation of the mortality and repellency effect of diatomaceous Earth (Sayan®) on three coleopteran store pests
Behnam Amiri-Besheli, Leila Doustdtar Kalkenari and Mahdi Kabiri Raeis Abad
Replacing common insecticides with natural compounds can be a suitable method for controlling damage to stored products by pests. In this research, the mortality and the repellency effect of Sayan® formulation of Diatomaceous Earth on adult Sitophilus oryzae L.,Oryzaephilus surinamensi, andTribolium castaneum (Herbst) have been investigated. A petri dish with an 8 cm diameter and a height of 1.5 cm was used for the bioassay. The mortality assessment was dose and time dependent. The LC50 values were 2.5, 1.9 and 12 gr/kg food for S. oryzae L.,O. surinamensi andT. castaneum, respectively, at 96 h post-treatments. Consequently, O. surinamensi and T. castaneum had the highest and the least sensitivity to this compound, respectively. The maximum mean of the repellency effect of Diatomaceous Earth on S. oryzae L was 48.95%. Overall, the results of this research have shown that Diatomaceous Earth can be used against stored products pests and it presents an alternative way for the chemical control of these pests.
Behnam Amiri-Besheli, Leila Doustdtar Kalkenari, Mahdi Kabiri Raeis Abad. The evaluation of the mortality and repellency effect of diatomaceous Earth (Sayan®) on three coleopteran store pests. J Entomol Zool Stud 2017;5(5):858-864.