Clustered populations of <i>Brassica nigra</i> plants (upper left), a solitary plant (upper right) and feeding <i>Pieris brassicae</i> caterpillars (below). Minghui Fei Rieta Gols Feng Zhu Jeffrey A. Harvey 10.1371/journal.pone.0149539.g001 https://plos.figshare.com/articles/figure/Clustered_populations_of_i_Brassica_nigra_i_plants_upper_left_a_solitary_plant_upper_right_and_feeding_i_Pieris_brassicae_i_caterpillars_below_/3108406 <p>Clustered populations of <i>Brassica nigra</i> plants (upper left), a solitary plant (upper right) and feeding <i>Pieris brassicae</i> caterpillars (below).</p> 2016-03-10 09:11:58 parasitized caterpillars insect herbivores plant Quantity Affects Development food deprivation period food deprivation plant density constraint Gregarious Insect Herbivore plant-herbivore-natural enemy interactions focus specialist endoparasitoid wasp brassicae