<i>Liocoris tripustulatus</i> offered a choice of sweet pepper (salad host) and nettle (wild host) leaves with the same % nitrogen content in a darkened choice chamber – summary of results.

1<p>n = 30 for each sex. Mann-Whitney test used to compare median time on leaf; Chi square test used to compare number of first contacts; ns = not significant.</p><p>When there was no difference in nitrogen content of the nettle and sweet pepper leaves both sexes spent significantly more time in contact with nettle leaves. There was no difference in the first leaf chosen in any of the trials with <i>L. tripustulatus</i>.</p

<i>Liocoris tripustulatus</i> offered a choice of sweet pepper (salad host) and nettle (wild host) leaves when the salad host had higher % nitrogen content in a darkened choice chamber – summary of results.

1<p>n = 30 for each sex. Mann-Whitney test used to compare median time on leaf; Chi square test used to compare number of first contacts; ns = not significant.</p><p>When offered a choice of nettle and sweet pepper when the pepper leaves had higher nitrogen content than nettle leaves, there were no preferences exhibited (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0046448#pone-0046448-t003" target="_blank">Table 3</a>).</p

Total percentage nitrogen in experimental leaves offered to <i>Liocoris tripustulatus.</i>

<p><i>Post hoc</i> comparisons (Fisher's pairwise comparisons) showed that the nettle leaves had significantly lower total percentage nitrogen than ‘high nitrogen’ pepper. There was no significant difference in total percentage nitrogen between nettle and ‘low nitrogen’ pepper leaves.</p

<i>Lygus rugulipennis</i> offered a choice of cucumber (salad host) and nettle (wild host) leaves in a darkened choice chamber – summary of results.

1<p>n = 30 for each sex. Mann-Whitney test used to compare median time on leaf; Chi square test used to compare number of first contacts; ns = not significant.</p><p>Females showed a significant preference for cucumber (salad host) over nettle (wild host). They chose cucumber leaves first in significantly more trials than nettle leaves. Males did not exhibit any preference between cucumber and nettle leaves.</p

<i>Lygus rugulipennis</i> offered a choice of sweet pepper (salad host) and nettle (wild host) leaves in a darkened choice chamber – summary of results.

1<p>n = 30 for each sex. Mann-Whitney test used to compare median time on leaf; Chi square test used to compare number of first contacts; ns = not significant.</p><p>In the choice tests with nettle and sweet pepper males of <i>L. rugulipennis</i> made first contact with sweet pepper on significantly more occasions than nettle This was the only preference exhibited by male or female <i>L. rugulipennis</i> in this set of experiments.</p

Total percentage nitrogen in experimental leaves offered to <i>Lygus rugulipennis.</i>

<p><i>Post hoc</i> comparisons (Fisher's pairwise comparisons) showed that the level of nitrogen in the salad leaves differed significantly to the nettle leaves but not to each other.</p