It is extremely difficult to respond to a translation question such as this one in a range of fifty to sixty words, when the answer is quite clearly only three words in length. However, I am attempting to do so. The Latin words you are seeking are "senectus et perfidia. "
The words "old age" are: senium in Latin. The word "treachery" includes a variety of choices: proditus, perfidia, insidiae, dolus. You might consider putting them together in this way: senium quod proditus.
