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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comA friend gave me a 4′ high cactus that I think is a euphorbia trigona. It looks healthy with lots of small leaves that she said were flowers. There are some fine spider webs at the top of the plant. I don’t know if there really are small spiders or if that’s what spider mites produce. Should I assume they are mites and spray w insecticidal soap? Can it hurt the plant?
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1 Comment To "euphorbia trigona"
#1 Comment By mikesmithIII@just-4-us.com On 11/30/2018 @ 1:43 am
I am just expressing my own experience; I had this issue last year and at the local HomeDepot they told me to use 1/2 Rubbing Alcohol and 1/2 Water in a spray bottle and then spray all over the plant. I did it once a day for two days and all the spider mites were vanished for good.
Supposedly a little Alcohol does not harm plants.