M.Y. Amin1*, E.L. Ayad1 and M.M.I. Aamir (2)
Stored Grain Insects Department, Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza 12619, Egypt; (2) Plant Protection Department, Faculty of Agriculture, Zagazig University, Egypt
*Email address of the corresponding author: [email protected]
Received: 19/12/2023; Accepted: 8/8/2024
The purpose of this study was to assess the impact of pressurized CO2 and N2 on the various stages of two well-known insect species found in storage, namely, Ephestia cautella (Walker) and Oryzaephilus surinamensis (L.).The insects were subjected to three different levels of pressurized gas (2, 4 and 6 Kg/cm2) in a metal gas cylinder over a period of two days at room temperature of around 30°C. The results obtained suggested that CO2 was significantly more effective than N2 gas. The egg stage of both insect species exhibited the greatest tolerance, whereas the adult stage displayed the highest sensitivity to both gases, regardless of pressure level. It was observed that insect mortality increased as the pressure level of gas increased, with the highest mortality rates recorded at the highest gas pressure (6 kg/cm2). Additionally, certain biochemical parameters were analyzed in adults of O. surinamensis that were exposed to 6 kg/cm2 of CO2 pressure for 2 days.
Ephestia cautella, Oryzaephilus surinamensis, pressurized gases, CO2, N2, biochemical parameters
https://doi.org/10.22268/AJPP-001351