Therefore, the signal substance not only plays the role of interspecies communication but also warns another food competitor, the cabbage and natural enemies. This mobile number list network function of communication materials may be far more common than we had imagined until recently. Insects are food experts, and not only adult females, who seek out egg-laying sites, are extremely picky about their host plants.
Caterpillars that hatch from eggs usually have only one goal of eating a specific type of food. Caterpillars are connoisseurs usually with refined taste. But how does an insect recognize its specific food plant, for example after it has lost a plant or if it has to search for a new food plant because the first food plant has already been eaten? This electrophysiological technique shows that the cabbage caterpillar's unique abilities are based on a dual trait.