superann

This plugin filters the sitewide comments feed as well as individual post comment feeds.
Upon first-time installation and activation, all trackbacks will be removed from the default WordPress comments feeds. 
You can override this behavior on the options page and also use the comments or trackbacks only feeds described below.
URL for comments only feeds: add the variable “comments” to your feed query string.
<ul>
<li>http://mysite.com/comments/feed/?comments</li>
<li>http://mysite.com/?feed=rss2&withcomments=1&comments</li>
</ul>
URL for trackbacks only feeds: add the variable “trackbacks” to your feed query string.
<ul>
<li>http://mysite.com/comments/feed/?trackbacks</li>
<li>http://mysite.com/?feed=rss2&withcomments=1&trackbacks</li>
</ul>

Separate Feed Comments and Trackbacks

Remove trackbacks from your sitewide and individual post comment feeds, and/or have alternate feeds for comments or trackbacks only.

Sander van Dragt

Introducing Hide Trackbacks – keep the benefits of track- and pingbacks (know when someone writes about posts) while keeping the comments clean and uncluttered.
After enabling the plugin, trackbacks and pingbacks are no longer shown on your posts and the comment count is updated correctly to reflect this. They remain accessible via the admin panel.
Original code created by <a href="http://www.honeytechblog.com/how-to-remove-tracbacks-and-pings-from-wordpress-posts/" rel="nofollow ugc">Honey Singh</a> (used with permission of the author).

Hide Trackbacks

Prevents trackbacks and pingbacks from showing up as comments on posts.

Separate Feed Comments and Trackbacks vs Hide Trackbacks