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The effects of photoperiod and temperature on diapause inducing of the great mormon butterfly Papilio memnon Linnaeus

2007; OMICS Publishing Group; Linguagem: Inglês

2168-9776

Yi ChuanHui, Xiaohong Chen, Shi JunYi, Zhou Cheng-li,

Maritime Transport Emissions and Efficiency

The effects of photoperiod and temperature on diapause inducing of the great mormon butterfly Papilio memnon were studied,which came from the population of Emei areas,Sichuan Province.The effects of photoperiod on diapause were related to temperature.Under constant temperature 20 ℃,the percentage of diapause individuals went up with the shortening of daylength during 12 h to 13 h,and reached to 100% when daylength less than 12.5 h.Under constant temperature 25 ℃,the percentage of diapause individuals went up with the shortening of daylength during 11 h to 13.5 h,too,and arrived 94.5% when daylength at 12 h,but the percentage didnot arrive to 100%.Under constant temperature 30 ℃,no diapause happened.The effects of temperature on diapause were also related to photoperiod.Under the same daylength and in the range of test temperature,the percentage of diapause individuals went down with temperature increasing. When temperature arrived to 30 ℃,no individual went to diapause whether daylength short or long.Only short daylength and low temperature were benefit to diapause,long daylength and high temperature were benefit to growth.Short daylength had a cumulative effect for inducing diapause.Under constant temperature 20 ℃,the critical photoperiod of Papilio memnon was LD 13 h 11 min∶10 h 49 min,under constant temperature 25 ℃,the critical photoperiod was LD 12 h 49 min∶11 h 11 min.The critical daylength shortened with the rising of temperature.The fifth instar larvae of Papilio memnon is the sensitive stage to photoperiod.