Need help please

[billc]

It does look like fertilizer burn, but if I'm reading your post correctly you've only fed it once in the last 5 months with 1 1/2 tps of MSU. That's more than I would give a paph at a single feeding, but that shouldn't be causing a burn.
MSU is not a time release fertilizer, and growing in s/h requires continual feeding in small doses. I would try watering at least 2X a week alternating plain water and 1/2 tsp MSU per gallon. Watering once a week and spraying at other times is probably not keeping enough moisture at the roots unless you are spraying the heck out of it.

Bill

[Leafmite]

Problems with new growth is said to often be a calcium issue. When my cattleyas (and a few others) lost their new growths (and, for many of them, their lives when it spread), I was told to add more calcium. The new growths are perfect so I think I will keep doing this. I have been adding extra calcium with all my orchids.
When I did have Black Rot (the black plague, as I think of it), nothing seemed to stop it so at the end I just cut away infected parts and swabbed the plants down (not the roots) with isopropyl alcohol, very well, a twice a day, for about a week. The orchids that recieved this treatment survived and are doing well.
I hope this helps.

[Wynn Dee13]

Originally Posted by billc

It does look like fertilizer burn, but if I'm reading your post correctly you've only fed it once in the last 5 months with 1 1/2 tps of MSU. That's more than I would give a paph at a single feeding, but that shouldn't be causing a burn.
MSU is not a time release fertilizer, and growing in s/h requires continual feeding in small doses. I would try watering at least 2X a week alternating plain water and 1/2 tsp MSU per gallon. Watering once a week and spraying at other times is probably not keeping enough moisture at the roots unless you are spraying the heck out of it.

Bill

MSU does come in a time release fertilizer. Ray sells it on his site.