grows tenaciously, but even this tough plant, which grows in U.S. Department of Agriculture plant hardiness zones 4 through 9, isn't immune to problems. Now let’s get down to the nitty gritty of getting rid of rust on metal. By itself it is not dangerous, in fact letting an iron nail become 'rusty' in lemon juice overnight was used by health relief staff as a field-treatment in areas of anemia and malnutrition. It may be made by steeping mint leaves in apple jelly, or in one of the various kinds of commercial gelatine. Mint rust is a common fungal disease of garden mint, but also affects marjoram and savory. I would cite just the toxicity of the zinc used in coins as a potential hazard: [h=2]Poisoning[/h] In 1982, the United States Mint began minting pennies coated in copper but made primarily of zinc. In fact, mint rust is so severe that in the past I've had to rip out my mint every year and replant it from scratch in sterile soil and containers. The fungus causes dusty orange, yellow and black spots on leaves, and distortion of shoots. Rust is simply an oxide of iron (Fe2O3). Plant rust diseases don't affect humans. Mint rust. Toxicity of Mint . With the new zinc pennies, there is the potential for zinc toxicosis, which can be fatal. The only problem when … We have oxidation going on in our own bodies, explaining why there is so much advertising for antioxidant foods and pills. If these strike, the best thing to do is get rid of your mint plants and get new, healthy ones. However, according to the ASPCA, the essential oils in mint are toxic to dogs, cats, and horses. If a lot is ingested, it can cause vomiting and diarrhea. A: Galvanized troughs make excellent gardening containers. Plants grow well in them, and they save a lot of bending over in the garden. I've tried copper-based fungicides, but (a) they don't work very well and (b) they're toxic so not good for a culinary herb like mint. Slow oxidation is revealed in such ways as rust on metal. When mint starts growing black spots on its leaves, your plants are likely suffering from leaf blight or advanced stages of mint rust. Mint can suffer from several plant diseases such as verticillium wilt, mint rust, mint anthracnose. Its formulation would act gently on the material it is working on and also on the human skin and this product is considered to be an environmentally safe product. Mint Jelly can be used instead of mint sauce, in the same manner as red currant jelly. A grating of mint is introduced sometimes into a potato salad, or into a fowl stuffing, and in Wales it is not unusual to boil mint with cabbage. It is a popular herb that … Just don't place them in the same spot or potting soil because that increases the chances that the disease will spread to the replacement plants as well. As … If you have it, it will be in the soil as well as the plants. Mint (Mentha spp.) Rapid oxidation is fire. The American Society for the Prevention of Cruelty to Animals warns that the only species of mint, in the genus Mentha, that is toxic to dogs is English pennyroyal (Mentha pulegium). The bigger issue is controlling the disease in the plants. At onset you can trim infected leaves and use a fungicide, but once it gets a good start, trimming and/or use of fungicides won't control it. The Evapo-Rust rust remover holds the number one spot and this is the type of rust remover that isn’t just non-toxic but also one customer would find very easy to use. As an edible herb, it is non-toxic to humans. Rust is oxidation. Mint or mentha belongs to the Lamiaceae family, which contains around 15 to 20 plant species, including peppermint and spearmint. ... Mint can sometimes get rust, which appears as small orange spots on the undersides of leaves. Rust is simply an oxide of iron ( Fe2O3 ) much advertising for foods. 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