Cat’s whiskers

Question

The leaves of the cat’s whiskers are blotchy pale yellow and white. What is wrong last year the leaves were totally green

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Answer 1

It would seem that these are prone to mosaic virus, which will be in the soil permanently. There is no treatment for this, but you may be able to prolong the death by using fungicide. Just apply it as the package recommends.
https://www.gardeningknowhow.com/ornamental/flowers/cat-whiskers/growing-cat-whiskers.htm