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<p>Dates are one of the Saudi Arabia’s most important agricultural produce, where they contribute to the country’s economic development. The dietary benefits and supply of essential nutrients for human health increase the importance of dates. The almond moth, <i>Cadra cautella</i> (Walker) (Lepidoptera: Pyralidae) is an important pest of stored agricultural commodities, particularly dates. The current study investigated the effects of single and mixed carbon dioxide and nitrogen gases in modified atmospheric packages in the laboratory against eggs, larvae, pupae, and adults of <i>C. cautella</i> at varied exposure times and temperatures. Different concentrations of CO<sub>2</sub> and N<sub>2</sub> gases were applied at 5 and 25&#xa0;°C temperatures for exposure periods of 5, 24, 48, and 72&#xa0;h, where normal air was applied as a control. Maximum mortalities were observed at 25&#xa0;°C and 72&#xa0;h of exposure. Higher concentrations of CO<sub>2</sub>, mainly 100% CO<sub>2</sub> and 75% CO<sub>2</sub> + 25% N<sub>2</sub>, efficiently reduced egg hatching and caused 100% mortality in larvae and pupae after relatively short exposure times. Larvae were the most resistant stage with 100% nitrogen concentration. Overall, treatments with a higher concentration of CO<sub>2</sub> and extended exposure time outperformed all life stages of <i>C. cautella</i>.</p>

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Significant impact of modified atmosphere with CO2 and N2 on developmental stages of Cadra cautella (Walker)

  • 期刊论文

  • 发表日期：

    2025年11月15日

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  • Abdullah H. Alrukban,
  • Mureed Husain,
  • Khawaja G. Rasool,
  • Abdullah M. A. Alhamdan,
  • Abdulrahman S. Aldawood

摘要

Dates are one of the Saudi Arabia’s most important agricultural produce, where they contribute to the country’s economic development. The dietary benefits and supply of essential nutrients for human health increase the importance of dates. The almond moth, Cadra cautella (Walker) (Lepidoptera: Pyralidae) is an important pest of stored agricultural commodities, particularly dates. The current study investigated the effects of single and mixed carbon dioxide and nitrogen gases in modified atmospheric packages in the laboratory against eggs, larvae, pupae, and adults of C. cautella at varied exposure times and temperatures. Different concentrations of CO2 and N2 gases were applied at 5 and 25 °C temperatures for exposure periods of 5, 24, 48, and 72 h, where normal air was applied as a control. Maximum mortalities were observed at 25 °C and 72 h of exposure. Higher concentrations of CO2, mainly 100% CO2 and 75% CO2 + 25% N2, efficiently reduced egg hatching and caused 100% mortality in larvae and pupae after relatively short exposure times. Larvae were the most resistant stage with 100% nitrogen concentration. Overall, treatments with a higher concentration of CO2 and extended exposure time outperformed all life stages of C. cautella.