Fig. 1
From: Everybody loves sugar: first report of plant feeding in triatomines

Ingestion of artificial sugar meals by 1st instar nymphs of Rhodnius prolixus. Animals were exposed to cotton wool soaked with bromophenol blue solution (1 % w/v) plus sucrose 10 % (w/v) (a and c, experimental) or bromophenol blue solution (1 % in water) (b and d, controls). Photos are representative insects or guts from groups of 20 insects. The experiment was repeated three times. a and b, whole insects. c and d, dissected guts. The dotted line shows the limits of the anterior midgut