The saw-toothed grain beetle Oryzaephilus surinamensis plays a major role in reducing the quality and volume of dried fruits. The aim of this study was to evaluate the effect of modified atmospheres (MAs) enriched in CO₂ or N₂ at 25 °C and 35 °C on the adult and larval stages of O. surinamensis and dried date quality. The tested MAs containing 20%, 30%, 40%, and 50% CO₂ and the MAs containing 97% and 98% N₂, with different exposure periods were performed in the laboratory at 25 °C or 35 °C ± 2 °C, 65% ± 5% r.h and photoperiod of 16 Light:8 Dark. The adults and larvae were found to be more susceptible to CO₂ or N₂ at 35 °C than those at 25 °C. Both adults and larvae reached 100% mortality after 4–6 days exposure to 20%–50% CO₂ at 25 °C and 3–5 days exposure to the same concentrations at 35 °C. The mortality reached 100% after 2–3 days when adults were exposed to 97% or 98% N₂ at 35 °C, but the larvae reached the complete mortality after 5 and 4 days exposure to 97% and 98% N₂, respectively, at 35 °C. The adult stage was more susceptible than the larval stage to MAs enriched in CO₂ or N₂. Also, the results showed that an MA containing 50% CO₂ and another containing 98% N₂ led to increased total carbohydrates, protein, fat, and ash in treated dates compared to control dates. MAs at high temperatures may be recommended to control O. surinamensis populations in dried date stores due to the advantage of a short duration treatment capable of killing larvae and adult stages of this insect, with positive effects on dried fruit quality.

锯齿状甲虫Oryzaephilus surinamensis在降低干果的质量和体积方面起着重要作用。本研究的目的是评估在 25 °C 和 35 °C 下富含 CO ₂或 N _{2 的}气调 (MA)对O. surinamensis成虫和幼虫阶段以及干枣品质的影响。测试的含 20%、30%、40% 和 50% CO ₂的 MAs 和含 97% 和 98% N ₂的 MAs ，在实验室中在 25 °C 或 35 °C ± 2 ° 下进行了不同的暴露时间C，65% ± 5% 相对湿度和 16 光：8 暗的光周期。发现成虫和幼虫对 CO ₂或 N ₂更敏感35 °C 时的温度高于 25 °C 时的温度。成虫和幼虫在 25 °C 下暴露于 20%–50% CO ₂ 4-6 天后，以及在 35 °C 下暴露于相同浓度 3-5 天后，死亡率均达到 100% 。成虫在35℃下暴露于97%或98% N ₂ 2-3天后死亡率达到100% ，而幼虫在暴露于97%和98% N ₂ 5天和4天后分别达到完全死亡, 在 35 °C。成虫阶段比幼虫阶段对富含 CO ₂或 N _{2 的}MAs 更敏感。此外，结果表明，一个含有 50% CO ₂的 MA和另一个含有 98% N ₂导致与对照日期相比，处理日期的总碳水化合物、蛋白质、脂肪和灰分增加。建议在高温下使用 MA 来控制干枣商店中的O. surinamensis种群，因为其优势在于能够杀死这种昆虫的幼虫和成虫阶段的短期处理，并对干果质量产生积极影响。