It is possible to disable trigger in another trigger?
Somthing like this:

  DISABLE TRIGGER "TrigAfterPictDelete" ON "DepPictures";
  EXECUTE IMMEDIATE 'DELETE FROM DepPictures WHERE ID = ?' USING OLDROW.ID;
  ENABLE TRIGGER "TrigAfterPictDelete" ON "DepPictures";

This code return error #700, but may be there are other way?

EXECUTE IMMEDIATE 'DISABLE TRIGGER "TrigAfterPictDelete" ON "DepPictures"';