Dendrobium smillieae yellow spots on new growth
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  #1  
Old 07-21-2019, 03:52 PM
jrengen jrengen is offline
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Dendrobium smillieae yellow spots on new growth Male
Default Dendrobium smillieae yellow spots on new growth

I have a Dendrobium smillieae that is putting up two new growths. I just noticed the new guys have yellow spots on them, photos attached. I am wondering if this is water damage or what? Would love some expert advice.
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Dendrobium smillieae yellow spots on new growth-20190721_150400-jpg   Dendrobium smillieae yellow spots on new growth-20190721_153253-jpg   Dendrobium smillieae yellow spots on new growth-20190721_153306-jpg   Dendrobium smillieae yellow spots on new growth-20190721_153324-jpg   Dendrobium smillieae yellow spots on new growth-20190721_153354-jpg  

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  #2  
Old 07-22-2019, 03:41 PM
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SaraJean SaraJean is offline
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Dendrobium smillieae yellow spots on new growth Female
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Does yours have little sap like deposits on the back side of the leaf? First double check for insects by wiping down with some rubbing alcohol and a cotton ball, but Iím curious to see what others will say. This happens to my Den. smillieae as well. They seem to happen mostly in the spring-summer so Iím wondering if it might just be some sap spots that happen during a high growth growth period. This is assuming it is otherwise well cared for (plenty of water, light, warm temps, and some food this time of the year)

Those are some nice fat new growths, btw!
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  #3  
Old 07-23-2019, 09:35 AM
jrengen jrengen is offline
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Dendrobium smillieae yellow spots on new growth Male
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I don't see any sap on the leaves. Checked already for insects, couldn't see anything. It's getting good water, light and food. I'm using MSU fertilizer weakly weekly. I thought it could need more magnesium, but don't know. The rest of the plant seems ok, maybe a spot here and there, but nothing really obvious. I moved it down the bench where there is a little more airflow. It will be interesting to see what happens.
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