I'm pretty new to gardening and I recently (~2 weeks ago) got a Pinus sylvestris 'Fastigiata' plant and I noticed that some needles started to yellow. Here are a few pics:-
The yellowing is mostly on the internal and lower needles, but there is also some yellowing on the tips of top needles, with the tips completely brown with some white stuff on them. And I also noticed the plant is full of ants, you can see it on one of the pictures.
Is this a problem that I need to do something about, and if yes, what exactly? Thanks.