Maureen McGuire, Sears Holdings Corp.'s chief marketing officer, is leaving the company at the end of the month. Sears, which declined to make McGuire available for an interview, says she is departing for personal reasons. Richard Gerstein, head of marketing at the Sears division, will take her place as head of marketing for the combined company. In addition, Sears home services chief Mark Good announced his departure in a memo sent to employees Tuesday. Both executives played a big role in hedge fund manager Edward Lampert's efforts to turn the combination of Kmart and Sears into a thriving …

The Food and Drug Administration has added iceberg lettuce and spinach to the short but growing list of foods approved for irradiation -- including meat, poultry and some shellfish -- to kill dangerous bacteria such as E. coli. Companies may have a tough time selling the idea to consumers, however. The FDA says that irradiation done correctly and at approved levels reduces or eliminates bacteria without altering the nutritional value of the greens or harming consumers. Opponents say more testing is needed. Food & Water Watch calls irradiation an "impractical, ineffective and very expensive gimmick" that may ruin …

General Motors chairman and CEO Rick Wagoner gave the public its first peek at the design of the Cherolet Cruze -- bigger than the Cobalt it replaces, but smaller than the midsize Malibu -- Thursday when he announced that the company is investing $500 million in the U.S. to build the vehicle. GM displayed a foam show model sprayed with a special coating to make it look like a real car. It plans to officially unveil Cruze at the Paris auto show next month. Wagoner says GM will begin production of the Cruze at its Lordstown, Ohio, small-car …

Nike kicked off a "Grapple in the Apple" campaign Thursday with a boxing match-style media event featuring flamboyant boxing promoter Don King and the No. 1- and No. 2-ranked players in tennis, Rafael Nadal and Roger Federer. Nike has endorsement deals with both and is looking to capitalize on a potential finals showdown between the two at the U.S. Open, which begins next week, by suggesting they're engaged in a heavyweight championship bout. The players have been given boxer-type nicknames: Roger "The Magician of Precision" Federer and Rafa "Matador of Spin" Nadal. The two have met in the …

Pepsi Bottling Group, the second-largest soft-drink bottler in the U.S., will distribute Crush sodas in most of the bottler's markets. The move represents a blow for PepsiCo, which stands to lose a large chunk of distribution for its own main orange soda -- Tropicana Twister -- at a time when fruit-flavored drinks are performing better than colas. Dr Pepper Snapple Group makes Crush. The deal also marks a comeback for Crush, a well-known brand that faded from store shelves after several bottlers dropped it for other brands. PBG will gain a widely recognized brand to take on Coca-Cola …