第二节生长与脱皮 Growth and moulting (ecdysis o Insect growth is discontinuous because the rigid cuticle limits expansion o Size increase is by moulting (ecdysis) The formation of new cuticle of greater surface area and shelding of the old cuticle.(由激素控 制——蜕皮激素 Ecdysone)。 蜕 Exuvia 不同种脱皮次数不同,同种脱 皮次数一般相同。一般脱皮 20次l Insect growth is discontinuous, because the rigid cuticle limits expansion. l Size increase is by moulting (ecdysis). – The formation of new cuticle of greater surface area and shelding of the old cuticle. (由激素控 制——蜕皮激素Ecdysone)。 – 蜕Exuvia – 不同种脱皮次数不同，同种脱 皮次数一般相同。一般脱皮 2—20次