Thursday March 1, 12:57 pm Eastern Time USDA won't confirm presence of StarLink in corn seed WASHINGTON, March 1 (Reuters) - The U.S. Agriculture Department said on Thursday it would not confirm the presence of a StarLink biotech protein in seed destined for this year's corn crop, but said it was investigating the issue. Dale Moore, USDA chief of staff, said the department was taking the situation seriously. USDA spokesman Kevin Herglotz told reporters that industry representatives presented ``data'' to USDA and other federal agencies on corn seeds. Herglotz said by next week there could be an update on the depth of the problem, but he and Moore refused to elaborate on the data despite repeated questions. StarLink corn, made by the European drug giant Aventis SA , was engineered with a protein known as Cry9C to help repel destructive pests. Last year, the discovery of StarLink -- a genetically modified variety approved only for animal feed -- in human food products caused major problems for the U.S. grain industry and a recall of more than 300 food products because of concerns about possible allergic reactions. The episode also damaged corn exports to Japan, the number one U.S. corn market.