Department of Plant Pathology and Ecology, The Connecticut Agricultural Experiment Station, New Haven, Connecticut 06511 United States.
Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, New Haven, Connecticut 06511 United States.
Environ Sci Technol. 2021 Aug 3;55(15):10805-10810. doi: 10.1021/acs.est.1c02323. Epub 2021 Jul 15.
Micronutrients applied as nanoparticles of metal oxides have shown efficacy in vegetable and other crops for improving yield and reducing Fusarium diseases, but their role in ornamental crop management has not been investigated. In 2017, 2018, and 2020, nanoparticles of CuO, MnO, or ZnO were foliarly applied at 500 μg/mL (0.6 mg/plant) to chrysanthemum transplants and planted in potting soil noninfested or infested with f. sp. . An untreated control and a commercial fungicide, Fludioxonil, was also included. Chrysanthemums treated with nanoscale CuO had a 55, 30, and 32% reduction in disease severity ratings compared to untreated plants in 2017, 2018, and 2020, respectively. Specifically, the average dry biomass for the three years was reduced 22% by disease, but treatment with nanoscale CuO led to a 23% increase when compared to controls. Similar trends with plant height were observed. Horticultural quality was improved 28% with nano CuO and was equal to the fungicide. Nanoscale MnO and the fungicide did not consistently reduce disease ratings or increase dry biomass each year. Nanoscale ZnO was ineffective. Nanoscale CuO-treated plants had 24 to 48% more Cu/g tissue than controls ( < 0.001). These findings agree with past reports on food crops where single applications of nanoscale CuO improved plant health, growth, and yield and could offer significant impacts for managing plant diseases on ornamentals.
将金属氧化物纳米颗粒作为微量营养素应用于蔬菜和其他作物已被证明能提高产量并减少镰刀菌病，但它们在观赏作物管理中的作用尚未得到研究。在 2017 年、2018 年和 2020 年，将 500μg/mL（0.6mg/株）的 CuO、MnO 或 ZnO 纳米颗粒叶面喷施于菊花幼苗，并种植在未受侵染或受 f. sp.侵染的盆栽土壤中。还包括未处理对照和商业杀菌剂 Fludioxonil。与未处理的对照相比，用纳米级 CuO 处理的菊花在 2017 年、2018 年和 2020 年的病情严重程度评分分别降低了 55%、30%和 32%。具体而言，三年的平均干生物量因疾病减少了 22%，但与对照相比，纳米级 CuO 的处理导致增加了 23%。植物高度也观察到类似的趋势。用纳米 CuO 处理可使园艺品质提高 28%，与杀菌剂相当。纳米级 MnO 和杀菌剂并未每年都能降低病情严重程度评分或增加干生物量。纳米级 ZnO 无效。纳米级 CuO 处理的植物组织中 Cu/g 含量比对照高 24%至 48%（<0.001）。这些发现与过去关于粮食作物的报告一致，即在单一应用纳米级 CuO 可改善植物健康、生长和产量，并可能对观赏植物的病害管理产生重大影响。
