New York--Magazine ad pages dropped 9.5% overall in April from a year earlier, with business magazines continuing to show dramatic declines, according to the Publishers Information Bureau. Business Week was down 43% in ad pages and 39% in ad revenue. Fortune and Barron's also showed steep declines. Magazines that skyrocketed last year covering the Internet are also hurting badly. Business 2.0, which has been on the sales block for the last few months, saw ad pages fall 62% in April from a year earlier, while ad revenue was down 38%. Ad pages for Red Herring--also the subject of sales talk--were down 56%, while ad revenue was down 23%.