Weeds are managed in Florida strawberry production systems with plastic mulches, fumigants, and herbicides. There are limited post-transplant options to control weeds that emerge in the planting holes in the plastic-covered beds, but flumioxazin at 107 g ai ha−1 can be applied pretransplant under the plastic mulch to control broadleaf and grass weeds. Three research trials were conducted in Balm and Dover, FL, in 2017 and 2018 to evaluate tolerance of the strawberry cultivar ‘Radiance’ to flumioxazin rates ranging from 54 to 6,854 g ha−1 and to estimate herbicide persistence under the plastic mulch. Shoot damage was observed at 428 to 857 g ha−1 (4× and 8× the label rate, respectively), but a significant increase in the number of dead plants was not observed until the treatment rate was 857 g ha−1 at one site and 3,427 g ha−1 at a second site (8× and 32× the label rate, respectively). Berry yields were unaffected by rates lower than 857 g ha−1. Flumioxazin persisted throughout the growing season (approximately 150 d) with no reduction in soil concentration. We conclude that applied at the label rate, flumioxazin is a safe pretransplant weed management option for season-long weed control in strawberry with no yield reduction at rates below 8× the label rate. Caution is recommended for growers who plant a second crop on the same bed.

中文翻译：

---

地膜下氟咪嗪土壤持久性及草莓移栽前应用的影响

佛罗里达草莓生产系统使用塑料覆盖物、熏蒸剂和除草剂管理杂草。用于控制塑料覆盖床种植孔中出现的杂草的移植后选择有限，但氟嘧啶在 107 g ai ha-1可在地膜下进行移栽前防治阔叶杂草和禾本科杂草。2017 年和 2018 年在佛罗里达州的 Balm 和 Dover 进行了三项研究试验，以评估草莓品种“Radiance”对 54 至 6,854 g ha 范围内氟米沙嗪的耐受性-1并估计塑料覆盖物下除草剂的持久性。在 428 至 857 g ha 观察到芽损伤-1（分别是标记率的 4 倍和 8 倍），但直到处理率为 857 g ha 时才观察到死亡植物数量的显着增加-1在一个地点和 3,427 克公顷-1在第二个站点（分别为标记率的 8 倍和 32 倍）。浆果产量不受低于 857 克公顷的产量影响-1. Flumioxazin 在整个生长季节（约 150 天）持续存在，土壤浓度没有降低。我们得出结论，在标签率下应用氟咪嗪是一种安全的移植前杂草管理选择，用于草莓中长达一个季节的杂草控制，在低于标签率 8 倍的比率下不会减产。建议在同一张床上种植第二季作物的种植者谨慎行事。