They can trigger allergies. One of the most common reasons for banning mulberry trees is that the pollen they produce can cause a severe allergic reaction, including asthma, in some people.

Many New Mexican plants can cause allergies, but some of the main pollen producers across the metro are juniper, cedar, elm, willow, poplar (including Aspen and Cottonwoods), mulberry, and sage.

LAS VEGAS, Nev. (FOX5) - As wind roars and trees bloom, officials say pollen levels in the Las Vegas Valley are the highest they’ve been in years. UNLV Pollen Monitoring Program Lab Supervisor ...