Leaf deformations in ant-plants

[Ezhikovich]

- Привет! Половина моих растений начала деформировать свои новые листья,а старые листья начали сворачиваться. Растут в разных условиях влажности и температуры, некоторые на подоконнике, а другие в орхидарии. Нет вредителей, удобрения используют Осмокот. В чем же может быть проблема? Буду признателен за ваши предложения.

[Frank]

Hi, Frank the administrator here, I ran Ezhikovich's posting thru 
google translate (Russian) and this is how it came out.  Some of 
our people want to take a shot at a possible answer for this
person?

Hello! Half of my plants began to deform their new leaves, 
and the old leaves began to curl. They grow in different conditions 
of humidity and temperature, some on the windowsill, and others in 
the orchidaria. No pests, fertilizers use Osmokot. 
What could be the problem? I would be grateful for your suggestions.

[Aurélien]

Looks like aphid of acari attack. We could see some holes in the tip of the leaves.