Lethal effect of Turkish dıatomaceous earth (Bgn-1 ) agaınst adults of German cockroaches (Blatella germanıca L.)

In this study, mortality effects of BGN-1 which is local diatomaceous earths, were investigated against adults of German cockroach (Blatella gemanica (L.)) on concrete, ceramic floor tile and laminate flooring. On these three different surfaces, B. germanica adults were exposed to BGN-1 diatomaceous earth at the doses of 2.5, 5, 10, 20 g/m2 along 6 days. In all surface applications of BGN-1 diatomaceous earth, exposure time and dose caused significant effect on mortality rates of B. germanica adults. It was determined that BGN-1 coded Turkish diatomaceous earth has the lowest mortality effect on all application surfaces at the dose of 2.5 g/m2. 2.5 g/m2 BGN-1 caused 100 % mortality after 6 days concrete surface and caused 100 % mortality at the end of the fourth day on ceramic floor tile and laminate flooring. On the other hand, doses of 5 and 10 g/m2 of BGN-1 caused 100% B. germanica mortality on all surfaces at the end of the second day, while the highest dose of 20 g /m2 of BGN-1 reached 100% B. germanica mortality at the end of the first day on all application surfaces. In general, the mortality activity of BGN-1 diatomites against B. germanica adults was found to be similar on all three surfaces. At the end of this study, local diatomaceous earth coded BGN-1 was found to be good alternatives for controlling B. germanica which is a medical pest insect.