Hide php action pages from google

Hi there, I do have a search form on my site which posts search queries to follogin URL: /subapp_search/search.php Depending on the search parameters it will then redirect to the appropriate URL. e.g.: /suche/labrador I now discovered in google webmastertools that this very page (search.php) is listed there as a reference for the speed of the whole page with 2.7s. This page should be irrelevant to google. Does somebody know how to hide it from google? All redirects coming from there are 301s and the page without parameters redirects to / Thank you for any help on that, Merlin