Effects of water extracts of frass produced by desert locusts (Sg), migratory locusts (Lm), and Bombay locusts (Ns) fed with rescue grass leaves on the number of A. Egg pods and B. Holes dug by adult desert locusts presented with extracts mixed with sand. Three cups containing frass extracts of the three locust species were simultaneously presented to locusts in each of two locust cages (light and dark histograms) for seven days. Numbers in parentheses indicate the total numbers of days observed. Bars on histograms indicate one standard deviation. Different letters in each comparison (light or dark histograms) in (A) indicate significant differences at the 5% level with Tukey’s multiple comparison test. n.s. indicates no significant differences in each comparison with ANOVA (light or dark histograms).