Behavioral perspectives on cockroach bait aversion
  Key Words  
  Behavioral avoidance, bait aversion, olfactory, gustatory. Blattella germanica
  N. Bao
  Bait aversion is a behavioral avoidance phenomenon, whereupon some naturally and/or artificially (e.g. toxic baits) selected Blattella germanica genotypes become less responsive to or completely avoid certain phagostimulatory food ingredients. Cases of avoidance behaviors, including associative learning, in vertebrates and invertebrates are reviewed to provide insights and stimulate discussions on how the German cockroach may have developed its olfactory and gustatory means to discriminate these food components.