Updated from 11:38 a.m. EDTShares of Central Garden and Pet ( CENT) were among the Nasdaq's laggards Monday after the lawn and pet products company warned that third-quarter earnings and sales would miss Wall Street estimates. Citing weak June grass seed sales and lower margins, it now expects to earn 84 cents to 86 cents a share on sales of $370 million. Analysts polled by Thomson First Call had expected it to earn $1.02 a share on sales of $397.9 million. The third-quarter stumble caused the company to lower its 2004 earnings and sales numbers as well. It now expects to report earnings of $1.92 to $1.96 a share on sales of $1.25 billion. In May it said it would earn $2.15 to $2.23 a share during 2004. Shares of Central Garden traded down $4.25, or 12.5%, to $29.85. ITT Educational ( ESI) shares fell after the company announced that its president and COO, Omer Waddles, is resigning. CEO Rene Champagne will assume Waddles' responsibilities. ITT said the resignation is not related to the ongoing government investigation into the company's business practices. Shares of ITT Educational traded down $3.01, or 8.1%, to $34.30. Shares of Marvel Enterprises ( MVL) rose in early action Monday after the company announced a $100 million stock buyback plan. Marvel's largest shareholder, Isaac Perlmutter, and the company's CEO, Avi Arad, have agreed not to sell any stock while the buyback plan is in effect. The entertainment company has $150 million in cash, and it says that cash levels would exceed $200 million by the end of 2004 if it did not repurchase any shares. By the end of the day, however, shares of Marvel Enterprises weakened and traded down 17 cents, or 1%, to $16.80. Kirkland's ( KIRK) fell after it warned Wall Street that second-quarter financial results would fall short of expectations. It now expects to report a loss of 12 cents to 16 cents a share on sales of $82 million to $84 million. Previously, it said that it would lose 3 cents to 7 cents a share on sales of $85 million to $87 million. The company blamed a June sale that did not produce the sales and margin results it had expected. Shares of Kirkland's traded down $1.29, or 11%, to $10.45.