Achimón Fernanda, Peschiutta Maria L, Brito Vanessa D, Ulla Sofia B, Pizzolitto Romina P
Instituto Multidisciplinario de Biología Vegetal (IMBIV-CONICET), Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, Córdoba X5016GCA, Argentina.
Instituto de Ciencia y Tecnología de los Alimentos (ICTA), FCEFyN, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, Córdoba X5016GCA, Argentina.
Plants (Basel). 2024 Oct 16;13(20):2893. doi: 10.3390/plants13202893.
Stored maize is frequently attacked by different pests, such as insects and microorganisms. The aim of the present study was to evaluate the bioactivities of sulcatone (6-methyl-5-hepten-2-one) against the maize weevil and the phytopathogenic fungi , , and Sulcatone showed a strong repellent effect with a maximum value of -92.1 ± 3.2% at 40 µM in two-choice olfactometer bioassays and an LC value of 17.2 µL/L air (95% 16.5-18.1) in a fumigant toxicity experiment. The antifungal effect of sulcatone was evaluated through the fumigant method, reporting MIC values of 3.5, 3.8, and 3.9 mM for , , and , respectively. Additionally, a silo-bag experiment containing all pests was conducted to evaluate the potential use of sulcatone in a real storage system. Sulcatone caused 71.69 ± 1.57% weevil mortality in silo-bags and proved to be effective as a fungicidal and antimycotoxigenic agent since both ergosterol and fumonisin B content were significantly reduced by 60% in silo-bags containing sulcatone. This study demonstrated that sulcatone has the potential to be used for the control of both insects and fungi of stored maize, without affecting the germination of grains.
储存的玉米经常受到不同害虫的侵害，如昆虫和微生物。本研究的目的是评估 sulcatone（6-甲基-5-庚烯-2-酮）对玉米象以及植物病原真菌、、和的生物活性。在双选嗅觉仪生物测定中，sulcatone 在 40 µM 时表现出强烈的驱避作用，最大值为 -92.1 ± 3.2%，在熏蒸毒性实验中的 LC 值为 17.2 µL/L 空气（95% 16.5 - 18.1）。通过熏蒸法评估了 sulcatone 的抗真菌作用，报告其对、和的 MIC 值分别为 3.5、3.8 和 3.9 mM。此外，还进行了一个包含所有害虫的青贮袋实验，以评估 sulcatone 在实际储存系统中的潜在用途。sulcatone 在青贮袋中导致 71.69 ± 1.57% 的象鼻虫死亡率，并且被证明是一种有效的杀真菌和抗产毒剂，因为在含有 sulcatone 的青贮袋中，麦角固醇和伏马菌素 B 的含量均显著降低了 60%。这项研究表明，sulcatone 有潜力用于控制储存玉米中的昆虫和真菌，而不影响谷物的发芽。
