Northerner Posted May 11, 2019 Share Posted May 11, 2019 I acquired a few specimens recently and a few of them had some scarring, then the scarring started turning yellow and spotting all over them. There's a pic there of one where the scarring looks like when I got them, and the first yellow spot popping up. What is it? How do I help them? 1 Quote Link to comment Share on other sites More sharing options...
andros88 Posted May 11, 2019 Share Posted May 11, 2019 My peruvianus had the same issue (yellow spotting) when I first received it. The spots kept multiplying until I cut them off. The new growth is healthy and doesn't have this issue. Still don't know what the yellow spots were tho - maybe some type of scale? Quote Link to comment Share on other sites More sharing options...
Evil Genius Posted May 11, 2019 Share Posted May 11, 2019 The original plant suffers from scale, which then again causes substantial scarring. Look into pesticides against Scale, e.g. Azamax or something similar. 1 Quote Link to comment Share on other sites More sharing options...
Evil Genius Posted May 11, 2019 Share Posted May 11, 2019 Second plant has scale too. Same treatment, Neem, Azamax, Spinosad etc. 1 Quote Link to comment Share on other sites More sharing options...
Northerner Posted May 11, 2019 Author Share Posted May 11, 2019 Thank you. Quote Link to comment Share on other sites More sharing options...
oncewhywechange Posted May 12, 2019 Share Posted May 12, 2019 On 11/05/2019 at 5:23 PM, Evil Genius said: The original plant suffers from scale, which then again causes substantial scarring. Look into pesticides against Scale, e.g. Azamax or something similar. Could of been scale but the problem is a fungal issue, You need to treat with a good fungicide. Quote Link to comment Share on other sites More sharing options...
Northerner Posted June 4, 2019 Author Share Posted June 4, 2019 In the spirit of growing cactus I decided to do just keep them dry. As the weather cooled and the air dried whatever it was has died off. Quote Link to comment Share on other sites More sharing options...
Strontium Dawg Posted June 5, 2019 Share Posted June 5, 2019 On 12/05/2019 at 7:46 PM, motherfirefly said: Could of been scale but the problem is a fungal issue, You need to treat with a good fungicide. I agree. There is a fungal issue and just keeping it dry won't fix it. Get some phosacid on it. Quote Link to comment Share on other sites More sharing options...
Strontium Dawg Posted June 5, 2019 Share Posted June 5, 2019 On 11/05/2019 at 12:21 PM, andros88 said: My peruvianus had the same issue (yellow spotting) when I first received it. The spots kept multiplying until I cut them off. The new growth is healthy and doesn't have this issue. Still don't know what the yellow spots were tho - maybe some type of scale? Not scale imo. I'd do the same, get some phosacid. You can get it from most garden centres or the big green shed as "Yates anti-rot". Phosacid is a systemic fungicide but not a toxic one, it's quite safe. 1 Quote Link to comment Share on other sites More sharing options...
andros88 Posted June 5, 2019 Share Posted June 5, 2019 Thanks Glaukus! It's going on my list for my next trip to Bunnings Quote Link to comment Share on other sites More sharing options...
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