WESBANCO <WSBC.O> ACQUIRING BANK OF SISSONVILLE Wesbanco Inc said its board executed a merger agreement with the <Bank of Sissonville>. When the merger is completed, each of the 50,000 shares of the Bank of Sissonville common stock outstanding will be converted into 2.75 shares of Wesbanco common stock, the company said. The Bank of Sissonville has total assets of 25.5 mln dlrs as of Dec 31, 1986, the company said.