I have a pine tree - I think it's a Jack Pine because there are two needles to each bunch - in a large container on my roof garden. I grew it from a seedling and now I think it's about 8 feet tall. This summer I noticed a lot of the needles in the middle area of the branch had turned brown. At dusk I've seen insects flying around the top of the tree, like they're performing a ritual. I only see them as the sun's going down; but I've also found lots of these insects dead on the breezeway in our building. I've attached a picture of the dead insect, plus one of the pine tree. I'd like to know what those brown needles mean. If they were on the lower branches I'd assume I hadn't watered it enough. But being in the middle of most branches has me stumped. Could it be the tree's unhappy in the container size? or is it infested? Anyone know what's happening to my pine tree?