July 30 (Reuters) - Dole Plc shares fell more than 6% in their New York Stock Exchange debut on Friday, giving the fruit and vegetable grower a valuation of nearly $1.4 billion. The company’s stock opened at $15, below the initial public offering price of $16. Reporting by Sohini Podder in Bengaluru; Editing by Aditya Soni Our Standards: The Thomson Reuters Trust Principles.