I have about 10 Segos in E. TX,I just looked and found mine have similar spots. But mine have fewer,from 50% to only 10% of the numbers of spots yours has. I see no pests. No answer; but a crazy guess- We had a hail storm about 6 weeks ago , my three largest segos are protected under trees and have the least spots ( less than 10% yours). Have you had hail ?