Re : Black marks on cactus - Is this scale or something else?

GemcapMarch 25, 2012

The photo of one of the "marks" when removed . Some of them have a sharp hook, and others one which is more flat based.

Image link:

Thank you for reporting this comment. Undo
FerocactusLatispinus(Zone 4/Sunset 43 WI)

Well, it looks a lot like an armored scale insect if it is scale. It would really help if the genus or species of the host cactus is known, since many types of scale insects specialise in a particular plant. With the identity of the cactus, you could possibly narrow it down to the species of scale insect, but more importantly, you would be able to find out all the pests that that plant can have. There is an article here on Garden Web in the FAQs section that talks about how to best remove scale infestations. I hope this can be of some help to you.

    Bookmark   March 31, 2012 at 9:35AM
Sign Up to comment
More Discussions
Surprise Gymnocalycium mihanovichii var. friedrichii polypoid seed pod
Hi, Just wanted to share. This seed pod by color and...
Grubs on succulents are killing them!
I am new to the group and have a question on how to...
Greenhouse at dawn (photo)
Here's a photo of my greenhouse about twenty minutes...
Echinocereus viridiflorus in the snow
I have a lot of nice hardy cacti in my outdoor rock...
id help
Cant figure out exactly what this cactus is
© 2015 Houzz Inc. Houzz® The new way to design your home™