美国科学家最近发现，在植物与昆虫的“战争”中，昆虫也会“窃听”植物发出的求救信号，提早做好准备，应付植物即将采取的防御计划。植物被昆虫啃食时，会产生一些化学物质，一是吸引这些昆虫的天敌来捕食昆虫，二是告知植物自身防御系统加强“军备”，制造对昆虫有毒的物质? American scientists recently discovered that in the “war” of plants and insects, insects would also “tap” the distress signal sent by the plant and prepare early for the forthcoming defensive plan of the plant. When plants are eaten by insects, they produce some chemical substances. First, they attract predators of these insects to prey on insects. Second, they tell their own defense systems to strengthen their “armaments,” and create substances that are toxic to insects.