Response of the different stages of Callosobrochus Maculatus (F .)and Tribolium Castaneum Herbst to pressurized CO₂, N₂ and air under two conditions of temperature [electronic resource].
استجابة الأطوار المختلفة لحشرتي خنفساء اللوبيا وخنفساء الدقيق الصدئية لثاني أكسيد الكربون، النيتروجين والهواء المضغوطين تحت درجتي حرارة مختلفين.
- p.333-344.
Includes references.
The present work aimed to study the efficiency of pressurized CO₂, N₂ and air against the different developmental stages of the cowpea beetle, Callosobruchus maculatus (F.) and the rust red flour beetle, Tribolium castaneum Herbst under two conditions of temptrature and 5 levels of gas pressure. The stages of both insect species were reared, chosen in a same age and exposed to the pressurized gases in a metal gas chamber for a period of two days. The results concerning C. maculatus showed that pressurized ,CO₂, was the most effective than the other two tested gases whatever the conditions of temperature. Mortality of insects increased gradually as the level of gases pressure increased. Adult stage was the most susceptible recording the highest average of mortality while pupal stage was the least susceptible. These results were recorded for both conditions of testing temperature. A similar trend was also recorded for the other tested insect species ( T. castaneum) with some exception for this insect where it was more sensitive to the pressurized CO₂, N₂ at the lower conditions of temperature (averaging 22 °C) than the cowpea beetle, while at the higher conditions of temperature (averaging 33 °C) the mortality of both insect species was very close. The results of this work show generally that using of CO₂ at 5 bar pressure and exposure period of 2 days can be useful and a promising method to control these two insect species if the storage facilities are suitable (from the airtight point of view) to conduct these procedures.