Daylily leaves have rust colored spots and streaks. Why ?
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Bryan's Workshop on Jun 20, 2016Hello! Wow, rusty leaves! This is actually a kind of new thing to happen to lilies. My in-laws sell different kinds of lilies to flower shops over here in Japan and a whole greenhouse was hit with the "rust spore." You should cut the plant down to the crown, so your daylily plant will not have any rust when the fan is cut off at crown level. Cut all of the outer old leaves that have gone brown too. Once this is done your daylily plant rust free. You can also look into herbicides if you don't want to cut them. The rust is a spore, so it won't kill the plant by going into the roots. It does easily spread and you should bleach any tools you use to touch rust. I am only speculating though. I could verify with a picture of the rust spots. Good Luck!Helpful Reply
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Janet Pizaro on Jun 20, 2016I would use a systemic fungicide. This will control the brown spots which is a fungus.Helpful Reply
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Linda B on Jun 20, 2016Try reading this article: daylily rust is fungal, and you'll need to treat with a fungicide. (You can also ignore it, since it generally just causes cosmetic problems and won't ultimately kill the plants.) Sanitation is really important -- remove all dead foliage and bag it for the trash to keep the fungal spores from spreading to healthy tissue. http://plantclinic.cornell.edu/factsheets/daylilyrust.pdfHelpful Reply
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Rodrigo Sebidos on Jun 20, 2016From the picture, it looks your plant are doing well,except for the streak in the petals, plants may be suffering from micro-nutrient deficiency. Apply fertilizer with Iron, Manganese, or Magnesium and see the results or consult your Agricultural agent in your area for better results.Helpful Reply
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Ams7630973 on Jun 20, 2016HHelpful Reply
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CLRAE on Jun 21, 2016NO DOUBT ABOUT IT--THIS IS DAYLILY RUST--AND YOU CAN USE THE SYSTEMIC FUNGICIDE AND NEEM OIL--IT IS VERY DIFFICULT TO GET RID OF--GOOD LUCK...Helpful Reply
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