Q: What would cause needles on my pine tree to turn black?
Chances are it's some type of fungal disease. If it were my tree I would gt an onsite inspection from a certified arborist. To find a professional in your area go to www.tcia.com and enter your zip code. Here's a website that details diseases that attack pines. http://ipm.illinois.edu/diseases/series600/rpd624/ Best And Happy Yardening, Nancy