A large canned pumpkin manufacturer says yields in Illinois appear to be less than anticipated this year.Roz O’Hearn is corporate and brand affairs director for Libby’s, which grows most of its pumpkins in central Illinois. O’Hearn tells the Peoria Journal Star that “the yield could be off by as much as a third” and the company is “disappointed.”O’Hearn says weather could further reduce yields. The harvest is underway now through October or early November. However, O’Hearn says the company thinks it will have enough pumpkin to meet fall holiday demand.Libby’s has run a processing plant in Morton since 1929. It is owned by Nestle.The University of Illinois says 90 percent of the pumpkins grown in the U.S. are raised within a 90-mile radius of Peoria.