Night Blooming Cyrus - Knowledgebase Question

Rockwell City, IA
Avatar for hannah_monta
Question by hannah_monta
June 2, 2007
My plants leaves have black spots that in places go all the way through the leaves and is apreading to all the new leaves. do you know if this is a bug or disease and what to do about it?

Answer from NGA
June 2, 2007
I can't tell without examining the plant, but night blooming cereus is usually disease-free so I'd suspect insects. Try dabbing at the spots with a Q-tip dipped in rubbing alchohol. If the spot is a pest the alcohol will kill it and you can scrape it off. If it doesn't change in color or shape and you can't scrape it off, it is a disease. You can try cutting out the diseased parts and the cactus will callous over the wound.

Best wishes with your plant!

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