Sorbus aucuparia as "Thor's protection". In English folklore, twigs of "S. aucuparia" were believed to ward off evil spirits and witches. The plant was called "the witch" in England and dowsing rods to find ores were made out of its wood. Twigs of "S. aucuparia" were used to drive cattle to the pasture for the first time in spring to ensure their health and fertility. The wooden shafts of forks and other farm implements were constructed from "S. aucuparia", to protect farm animals and production from witches' spells. In weather lore, a year with plentiful rowan fruit would have a good grain
Insecticidal soap at higher concentrations or at temperatures above 32 °C (90 °F). Plant injury may not be apparent until two days after application. Some plant species are particularly sensitive to soap sprays. Highly sensitive plants include: horse chestnut, Japanese maple ("Acer"), "Sorbus aucuparia" (mountain ash), Cherimoya fruit, "Lamprocapnos" (bleeding heart), and sweet pea. Other sensitive plants are, for example: "Portulaca", some tomato varieties, "Crataegus" (hawthorn), cherries, plum, "Adiantum" (maidenhair fern), "Euphorbia milii" (crown of thorns), "Lantana camara", "Tropaeolum" (nasturtium), "Gardenia jasminoides", "Lilium longiflorum" (Easter lily). Conifers under (drought) stress or with tender new growth are sensitive as well. Damage may occur