Sensory and nutritional effects of amino acids and phenolic plant compounds on the caterpillars of two Pieris species / J.J.A. van LoonKoolwitjes / Maarten de JonghForaging under incomplete information : parasitoid behaviour and community dynamics / Matthijs VosOviposition behaviour as influenced by the oviposition deterring pheromone in the large white butterfly, Pieris brassicae / J.W. Klijnstra