Dingle Hugh
Department of Zoology, University of Iowa, 52242, Iowa City, Iowa.
Oecologia. 1974 Mar;17(1):1-10. doi: 10.1007/BF00345090.
Oncopeltus fasciatus exhibits a facultative reproductive diapause which is triggered by short photoperiods. The duration of the triggering photoperiod (the "critical photoperiod") is a function of the environmental conditions under which populations are reared. Some individuals are apparently sensitive to critical photoperiods in the early instars, but maximum sensitivity, indicated by 100% diapause, occurs in the late 5th instar during development of the pharate adult. Sixty per cent retain sensitivity into the first five days of adulthood. Temperatures of 27°C can prevent diapause. Once initiated, diapause can be broken either by raising the temperature or increasing the day length; it is broken abruptly, for once oviposition starts, it proceeds at maximum rate. Diapause contributes significantly to a migratory strategy in the temperate parts of the range of O. fasciatus and probably does so in the tropics as well.
豆长蝽表现出一种兼性生殖滞育，由短光照周期触发。触发光照周期（“临界光照周期”）的时长是种群所饲养环境条件的函数。一些个体显然在低龄期对临界光照周期敏感，但在成虫发育的五龄后期出现100%滞育所表明的最大敏感性。60%的个体在成年期的前五天仍保持敏感性。27°C的温度可阻止滞育。一旦开始，滞育可通过升高温度或增加日照长度打破；滞育被突然打破，因为一旦产卵开始，就会以最大速率进行。滞育对豆长蝽分布范围温带地区的迁徙策略有显著贡献，在热带地区可能也是如此。
