@unpublished{orgprints4866,
           title = {Efficacy of Surround? WP against the European pear psyllid (Cacosylla pyri) in large-scale field trials},
          author = {Claudia Daniel and Eric Wyss},
            year = {2003},
        keywords = {Entomologie Obstbau, Birenblattsauger},
             url = {http://orgprints.org/4866/},
        abstract = {Are pre-flowering applications of Surround? WP sufficient to keep the European pear psyllid (Cacopsylla pyri) below the economic threshold for the whole season?}
}