Hi Donald,
I'm not exactly sure what's going on here, but I do have a couple of suggestions.
I know that when I sometimes move my plants from one location to another, they sometimes go into a bit of shock and slow their growth or even blast a few buds (if they are in spike). As for Den. Medy Stripe...it is a pretty hardy plant in my collection, and I've not had this happen with it. Of course my growing conditions are very different from yours, so that may have an influence on it.
The other thing I thought of, which may be more likely, is an insect pest. I have seen thrips and spider mite damage that looks like what you are describing, where buds appear to be dried up. Both of these pests can be difficult to see because they are very tiny...mites more so than thrips. To check for thrips, look at your buds/blooms early in the day using a magnifying glass. They are little crawly bugs that move very fast and are usually greenish or black/brown in color. To check for spider mites, take a clean tissue and rub it along the back of a few leaves of your dendrobium. If you see red streaks on the tissue, you’ve got spider mites.
Both are sucking insects, and can literally suck the life right out of your flowers/plants. They can also go into a quick major infestation when the environment is dry, which is often the case when you move plants inside. I had this problem when I grew my chids up north before moving to Florida. I made it a point to treat my plants aggressively before taking them in for the winter and even that didn’t get all the little buggers sometimes.
I'm not sure if this will point you in the right direction, but I am hoping it helps.
Dendrobium Medy Stripe
everyone. I've posted before and all the help has been wonderful. My Medy Stripe that spent the summer oudoors along with a variety of other species grew extremely well and started to put out buds that for whatever reason stopped growing and the tips of all the buds dried up. Presently I have some Catts, Masdies, Phals, and a Cymbidium in bloom along with two other dendrobiums.
My partner's brother lives in Leominster, so I'm familiar with your growing area. I wouldn't think that this would be a problem for the plant in general (dendrobiums can take almost full sun here in south Florida), but perhaps with the buds having this abrupt change in light, it was enough to burn their tips.
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