Akademik Veri Yönetim Sistemi
Journal of Stored Products Research, cilt.107, 2024 (SCI-Expanded)
Diatomaceous earth (DE) has a promising potential in the control of stored-product pests. Most of the studies on the insecticidal potential of DE products are based on their persistent effects or the mortality they lead to via mixing with the grain. However, the knowledge on the performance of DEs on a particular surface is limited. In the current study, the insecticidal efficacy of a DE product, SilicoSec® was investigated against adults of Sitophilus granarius, Rhyzopertha dominica, and Tribolium confusum by surface application at 2.5, 5.0, 10.0, and 20.0 g/m2 on a concrete surface that is commonly used in storage structures. In S. granarius experiment, the highest immediate mortalities (89.2–99.2%) were obtained by the 5-day exposure even at the lowest rate (2.5 g/m2), while the highest delayed mortalities were 92.5% and 85% at rates of 2.5 and 20 g/m2, respectively by the 3-day exposure. In R. dominica experiment, the highest immediate mortalities (92.5–98.3%) were obtained by the 3-day exposure even at the lowest rate, while the highest delayed mortalities were 90.1 and 98.3% at rates of 10 and 20 g/m2, respectively, by the 1-day exposure. In T. confusum experiment, the highest immediate mortalities (83.3–91.0%) were obtained by the 7-day exposure at 10 or 20 g/m2, while the highest delayed mortalities were obtained by the 7-day exposure, and were 90.0 and 95.9% at rates of 10 and 20 g/m2, respectively. In conclusion, the insecticidal effect of surface application of SilicoSec® was high, moderate, and low against S. granarius, R. dominica, and T. confusum, respectively at concrete surfaces. A rate of 2.5 g/m2 of SilicoSec® provided an efficient control for S. granarius and R. dominica by 3- and 5-day exposures, respectively, while comparable mortality was obtained at a higher rate (10 or 20 g/m2) and exposure time (7-day) for T. confusum.