Ladies' apparel retailer Christopher & Banks Corp has recorded a 34 per cent drop in second-quarter earnings.

Second-quarter earnings fell to $5.6 million, or 15 cents per share, from $8.5m, or 22 cents per share, last year.

Sales for the quarter rose 7 per cent to $96.4m from $89.7m last year, the company said, while same-store sales at locations open at least 12 months fell 6 per cent.

Chief executive Bill Prange said in a statement: "In the second quarter, we continued to implement changes to our merchandise assortment that we believe will resonate with our core customer.

"The impact of these changes has not yet been realised as, based on month-to-date performance, September same-store sales are anticipated to be down 8 per cent."

However, the company said certain styles have produced early strong sales, and that reorders of that merchandise will become available in October to boost sales in November.

Christopher & Banks, which plans to open 42 new stores in the third quarter, operates 588 stores.