magento_model_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data noupdate="0">

        <record id="view_magento_backend_form" model="ir.ui.view">
            <field name="name">magento.backend.form</field>
            <field name="model">magento.backend</field>
            <field name="inherit_id" ref="magentoerpconnect.view_magento_backend_form"/>
            <field name="arch" type="xml">
                <field name="warehouse_id" position="after">
                    <field name="pricelist_id" on_change="onchange_pricelist_id(pricelist_id)"/>
                </field>
            </field>
        </record>

        <record id="view_magento_website_form" model="ir.ui.view">
            <field name="name">magento.website.form</field>
            <field name="model">magento.website</field>
            <field name="inherit_id" ref="magentoerpconnect.view_magento_website_form"/>
            <field name="arch" type="xml">
                <group name="options" position="inside">
                    <field name="pricelist_id"
                        attrs="{'invisible': [('magento_id', '==', '0')]}"
                        on_change="onchange_pricelist_id(pricelist_id)"
                        groups="product.group_sale_pricelist"/>
                </group>
            </field>
        </record>
    </data>
</openerp>