%0 Generic %A Daniel, Claudia %A Wyss, Eric %D 2003 %F orgprints:4866 %K Entomologie Obstbau, Birenblattsauger %T Efficacy of Surround® WP against the European pear psyllid (Cacosylla pyri) in large-scale field trials %U http://orgprints.org/4866/ %X Are pre-flowering applications of Surround® WP sufficient to keep the European pear psyllid (Cacopsylla pyri) below the economic threshold for the whole season?