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  #1  
Old 05-25-2020, 07:32 PM
shahnw shahnw is offline
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catasetum with leaf spots
Default catasetum with leaf spots

My catasetum has recently developed these chlorotic spots. In a few places, there appear to be larger, irregularly shaped black spots, the largest of which is slightly translucent at the center. I have a second catasetum that has also started to display one or two of the small spots. I have thought thrips, spider mites, and cercospora, but I am fairly ignorant in this area and at a loss for what it is and what to do.
catasetum with leaf spots-image0-jpg

catasetum with leaf spots-image2-jpg

catasetum with leaf spots-image1-jpg
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  #2  
Old 05-26-2020, 05:32 PM
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catasetum with leaf spots Female
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That looks to me like sunburn - Catasetinae need bright light, but a sudden blast of unfiltered sun can still toast leaves.
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  #3  
Old 05-26-2020, 08:44 PM
shahnw shahnw is offline
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Thanks Roberta, that is very helpful. do you have any idea as to what might be causing the small spots? you can see them best in the second image.
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Old 05-26-2020, 08:51 PM
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Something may be munching... look at the underside of the leaf and see if perhaps scale. Or it could be just on top. Would not be a bad idea to spray with Bayer's Advanced (or whatever they call it now) - spray both sides of the leaves. It does contain a miticide as well as insecticide (and Catasetinae are spider-mite magnets though that doesn't look like spider-mite damage)
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Old 05-26-2020, 10:51 PM
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I'd say Roberta nailed this diagnosis!
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Old 05-26-2020, 11:37 PM
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I'd say Roberta nailed this diagnosis!
Thanks!
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Old 05-27-2020, 12:20 AM
shahnw shahnw is offline
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It does look like you may be right Roberta. I just took a closer look at the rest of my plants. My Phal and my Peristeria elata look like something has been munching on them as well.
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