Within integrated pest management options, fumigation of stored products is one method to help control post-harvest insect infestations in our food and agricultural products. Fumigant gas concentration monitoring is important to confirm that the treatment was adequate to achieve the desired insect control, but monitoring can be relatively expensive and labor intensive. This study evaluated how accurately dosimeter tubes could monitor phosphine fumigation treatments. The dosimeter tube is designed to continuously react with phosphine gas during the fumigation period and yields a measurement in terms of concentration ∗ time product or CT, which can be interpreted as cumulative exposure. Two models of dosimeter tubes were evaluated (high range and low range). The reference method for these trials were wireless phosphine monitoring sensors, which recorded gas concentrations at hourly intervals during an exposure, and from this a CT product was also calculated. Model LPG-1, high-range dosimeter tube, measured within ± 25% of the phosphine monitoring sensors for CT dosages less the 70,000 ppm∗hr. Model LPG-2, low-range tube, tended to significantly over-estimate phosphine CT dosage by 50%–100% of the phosphine monitoring sensor references. Secondly, bioassays of fumigant efficacy were performed using susceptible and resistant adult Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae), lesser grain borers, and Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae), red flour beetle, for estimating insect control at the varied fumigation CT treatments. For the susceptible strains, CT dosages ∼5000 ppm∗hr controlled both species. However, the insect control varied from 60% to 100% for resistant adults at CT dosages of ∼20,000 ppm∗hr. The dosimeter tubes function in these ranges of dosages where each insect species are controlled and the dosimeter tube model LPG-1 provides reasonable estimates of the fumigation dosage for a given treatment level.

在病虫害综合治理方案中，对产品进行熏蒸是帮助控制食品和农产品中收获后虫害的一种方法。熏蒸剂气体浓度监测对于确认该处理足以实现所需的昆虫控制非常重要，但监测可能相对昂贵且劳动强度大。这项研究评估了剂量计管监测磷化氢熏蒸处理的准确性。剂量计管设计为在熏蒸期间与磷化氢气体连续反应，并根据浓度*时间乘积或CT进行测量，这可以解释为累积暴露。评价了两种剂量计管模型（高量程和低量程）。这些试验的参考方法是无线磷化氢监测传感器，记录在暴露期间每小时间隔的气体浓度，并由此计算出CT产物。LPG-1型高剂量剂量管，在磷化氢监测传感器的±25％范围内进行测量，用于CT剂量小于70,000 ppm * hr。LPG-2型低射程管倾向于显着高估磷化氢CT剂量，达到磷化氢监测传感器参考值的50％–100％。其次，使用易感和耐药的成年人进行熏蒸剂功效的生物测定 往往显着高估了磷化氢CT剂量，占磷化氢监测传感器参考值的50％–100％。其次，使用易感和耐药的成年人进行熏蒸剂功效的生物测定 往往显着高估了磷化氢CT剂量，占磷化氢监测传感器参考值的50％–100％。其次，使用易感和耐药的成年人进行熏蒸剂功效的生物测定小粉bore的Rhyzopertha dominica（F。）（鞘翅目：Bostrichidae）和甲虫Tribolium castaneum（Herbst）（鞘翅目：Tenebrionidae），是红色的甲虫，用于估计在不同的熏蒸CT处理下的昆虫控制。对于易感菌株，CT剂量〜5000 ppm * hr控制了这两种。然而，对于CT剂量约为20,000 ppm * hr的抗性成虫，其昆虫控制范围为60％至100％。剂量计管在这些剂量范围内起作用，其中每种昆虫都受到控制，并且剂量计管模型LPG-1提供了给定处理水平下熏蒸剂量的合理估算。