The pooled analysis showing trends

The pooled analysis showing trends of parasitism during the
corn silking stage showed significantly greater parasitism in
biocontrol-enhanced plots compared to monoculture controls on
mid- to final sampling dates (mid: F1,8 = 10.9, P = 0.01; final:
F1,8 = 16.0, P < 0.01) and was significantly greater in released plots
compared to intercropped plots on mid-sampling dates (F1,8 = 18.0,
P < 0.01) (Fig. 1). The contingency table analysis using Fisher exact
tests, showed the proportion of H. zea eggs from which parasitoids
emerged was significantly greater in biocontrol-enhanced plots
compared to monoculture controls (P < 0.05), and was higher in
release plots compared to intercropped plots on each sampling
date (P < 0.05) (Fig. 2).