we can disable the update of the plugins in wordpress using the following code.
remove_action( 'load-update-core.php', 'wp_update_plugins' );
add_filter( 'pre_site_transient_update_plugins', create_function( '$a', "return null;" ) );
the wordpress shows update alerts on the wp-admin in the dashboard. we can prevent the information showed for doing the update can be stopped by this code