Most viticultural regions in the world annually sustain spring frost injury-associated yield loss. Researchers have developed sprayable products to prevent spring frost injury by delaying budbreak. The goal of this research was to evaluate the efficacy of novel products, including Amigo oil,® ProTone,® and FrostShield,® to delay budbreak and the effect of these products on vegetative and reproductive growth in grapevines. The early budbreaking cultivars La Crescent and Marquette were used in field experiments in 2018 and 2019 and in a growth chamber experiment in 2019. Treatments included a control (no spray), 10% (v/v) Amigo oil, 500 mg/L S-ABA ProTone, and FrostShield. In field experiments, FrostShield consistently delayed the budbreak of both cultivars for four to six days, while the other two products showed a very limited effect. In addition, FrostShield did not affect cultivars’ vegetative or reproductive growth. In the growth chamber experiment, FrostShield delayed the budbreak of two cultivars for more than two weeks, while the effect of the other two products was inconsistent between cultivars. Our results indicate that FrostShield outperformed Amigo oil and ProTone by consistently delaying budbreak without negatively affecting vegetative or reproductive growth, suggesting that FrostShield might be an effective product to prevent spring frost injury.

中文翻译：

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葡萄延迟萌发产品避免春霜害的评价

世界上大多数葡萄种植区每年都会遭受与春季霜冻相关的产量损失。研究人员开发了可喷洒的产品，通过延迟萌芽来防止春季霜冻伤害。本研究的目的是评估包括 Amigo oil® ProTone® 和 FrostShield® 在内的新型产品延迟发芽的功效以及这些产品对葡萄藤营养和生殖生长的影响。早期萌芽品种 La Crescent 和 Marquette 分别用于 2018 年和 2019 年的田间试验以及 2019 年的生长室试验。 处理包括对照（不喷洒）、10% (v/v) Amigo 油、500 mg/L S -ABA ProTone 和 FrostShield。在田间试验中，FrostShield 始终将两个品种的萌芽延迟 4 到 6 天，而其他两种产品的效果非常有限。此外，FrostShield 不影响栽培品种的营养生长或生殖生长。在生长室实验中，FrostShield 将两个品种的萌芽延迟了两周以上，而其他两种产品在品种之间的效果并不一致。我们的结果表明，FrostShield 通过持续延迟萌芽而不对营养或生殖生长产生负面影响，优于 Amigo 油和 ProTone，这表明 FrostShield 可能是预防春季霜冻伤害的有效产品。