Mineral oil added to fungicide spray mixtures has been a frequently used strategy to control citrus black spot (CBS) worldwide. Although mineral oil may increase the efficacy of control, its use represents around 15% of the costs of a CBS spray program. This study aimed to assess the performance of different proportions of mineral oil added to a fungicide tank mixture for CBS control in young (less than 10 years old) and old (more than 12 years old) sweet orange orchards of early (‘Hamlin’), mid-season (‘Pera’) and late-maturing (‘Valencia’) cultivars in São Paulo state, Brazil. The efficacy of 0.15%, 0.20% or 0.25% mineral oil added to a fungicide spray mixture was determined by assessing CBS incidence, severity and fruit drop in six orchards over two seasons.

中文翻译：

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树龄和品种导向使用添加到杀菌剂罐混合物中的矿物油防治甜橙果园柑橘黑斑病

添加到杀菌剂喷雾混合物中的矿物油一直是世界范围内控制柑橘黑斑病 (CBS) 的常用策略。尽管矿物油可能会提高控制效果，但它的使用约占 CBS 喷雾程序成本的 15%。本研究旨在评估添加到杀菌剂罐混合物中的不同比例矿物油在年轻（小于 10 岁）和成熟（大于 12 岁）甜橙早期（'Hamlin'）果园中的 CBS 控制性能，巴西圣保罗州的中期（'Pera'）和晚熟（'Valencia'）品种。通过评估两个季节内六个果园的 CBS 发病率、严重程度和落果情况，确定添加到杀菌剂喷雾混合物中的 0.15%、0.20% 或 0.25% 矿物油的功效。