Answer: Gloriosa daisies are usually quite trouble free and very reliable. Based on your description I'm not sure exactly what has attacked your plants, but it sounds like either a bacterial or fungal problem, possibly mildew. Generally it is always wise to remove and destroy any infected plants or parts of plants as they occur to try to slow the spread of disease. At the end of the season, be especially careful to practice good sanitation by removing and destroying all of the frost-killed plant material. This shopuld reduce the chances of infection next year. Most diseases are spread during wet weather or periods of high humidity and high temperatures, so it may just be that conditions favored it this year. I'm sorry about your plants.
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