Clone and Validate cloned fields

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.11.1/jquery.validate.min.js"></script>
<form method="post">
<div class="wrapper">
    <div class="toclone">
        <select name="list">
            <option>selecione...</option>
            <option>opção 1</option>
            <option>opção 2</option>
            <option>opção 3</option>
            <option>opção 4</option>
        </select>
        <input type="text" name="produtos[qtd][]">
        <button type="button" id="add">+</button>
        <button type="button" id="remove">-</button>
    </div>        
</div>
    <input type="submit">
    </form>

CSS

label.error {
    color: red;
    font-size: 10px;
    font-family: arial;      
}