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N2 controlled atmosphere reduces postharvest mycotoxins risk and pests attack on cereal grains
Phytoparasitica ( IF 1.5 ) Pub Date : 2020-05-30 , DOI: 10.1007/s12600-020-00818-3
Moncini Lorenzo , Sarrocco Sabrina , Pachetti Gianpaola , Moretti Antonio , Haidukowski Miriam , Vannacci Giovanni

Mycotoxigenic fungi and pests are responsible for quality losses during medium to long-term storage of grain. Since gas composition is considered one of the most important abiotic conditions that influence fungal and pest growth, the use of a controlled atmosphere with a very high N2 concentration is a valid tool to control grain quality in post-harvest. Aim of the present work is to evaluate the use of a highly purified N2 controlled atmosphere – generated in situ by a Membrane Nitrogen Separator (Eurosider s.a.s) – for safely storage of corn and wheat grains. Two different parallel lab-scale experiments were performed in order to assess the effect of N2 atmosphere on: (1) the growth of Fusarium graminearum, Fusarium langsethiae, Aspergillus flavus and Fusarium verticillioides on agar and the production of aflatoxins on corn grains; (2) the populations of the most important post-harvest pests such as Sitophilus oryzae and Tribolium confusum on wheat grains and flour, respectively. When exposed to highly purified N2 controlled atmosphere (98.5%±0.5), growth and sporulation of all the four pathogens and aflatoxins production by Aspergillus were significantly reduced. In addition, atmosphere containing 98.5%±0.5 N2 caused the complete mortality of adults of S. oryzae after 3 days on wheat and of T. confusum after 7 days on flour. Results herewith reported suggest that N2 controlled atmosphere represents an eco-friendly tool that could be transferred to a large-scale system for grain storage in order to avoid or reduce chemical treatments.

中文翻译:

N2 控制气氛降低了谷物收获后霉菌毒素的风险和害虫侵袭

产霉菌毒素的真菌和害虫是造成谷物中长期储存期间质量损失的原因。由于气体成分被认为是影响真菌和害虫生长的最重要的非生物条件之一,因此使用具有非常高 N2 浓度的受控气氛是在收获后控制谷物质量的有效工具。当前工作的目的是评估使用高度纯化的 N2 受控气氛 - 由膜氮分离器 (Eurosider sas) 原位产生 - 用于安全储存玉米和小麦谷物。进行了两个不同的平行实验室规模实验,以评估 N2 气氛对以下方面的影响:(1) 禾谷镰刀菌、毛病镰刀菌、黄曲霉和轮枝镰刀菌在琼脂上的生长以及黄曲霉毒素在玉米粒上的产生;(2) 小麦籽粒和面粉上最重要的收获后害虫如 Sitophilus oryzae 和 Tribolium confusum 的种群。当暴露于高纯度 N2 受控气氛 (98.5%±0.5) 时,所有四种病原体的生长和孢子形成以及曲霉产生的黄曲霉毒素均显着减少。此外,含有 98.5%±0.5 N2 的空气导致小麦 3 天后稻瘟病成虫和面粉 7 天后T. confusum 成虫完全死亡。在此报告的结果表明,N2 受控气氛代表了一种环保工具,可以转移到大型粮食储存系统中,以避免或减少化学处理。当暴露于高纯度 N2 受控气氛 (98.5%±0.5) 时,所有四种病原体的生长和孢子形成以及曲霉产生的黄曲霉毒素均显着减少。此外,含有 98.5%±0.5 N2 的空气导致小麦 3 天后稻瘟病成虫和面粉 7 天后T. confusum 成虫完全死亡。特此报告的结果表明,N2 受控气氛是一种环保工具,可以转移到大型粮食储存系统中,以避免或减少化学处理。当暴露于高纯度 N2 受控气氛 (98.5%±0.5) 时,所有四种病原体的生长和孢子形成以及曲霉产生的黄曲霉毒素均显着减少。此外,含有 98.5%±0.5 N2 的空气导致小麦 3 天后稻瘟病成虫和面粉 7 天后T. confusum 成虫完全死亡。在此报告的结果表明,N2 受控气氛代表了一种环保工具,可以转移到大型粮食储存系统中,以避免或减少化学处理。小麦 3 天后 oryzae 和面粉 7 天后 T. confusum。在此报告的结果表明,N2 受控气氛代表了一种环保工具,可以转移到大型粮食储存系统中,以避免或减少化学处理。小麦 3 天后 oryzae 和面粉 7 天后 T. confusum。在此报告的结果表明,N2 受控气氛代表了一种环保工具,可以转移到大型粮食储存系统中,以避免或减少化学处理。
更新日期:2020-05-30
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