
Effects of development and population growth potential of Perina nuda under different photoperiods
WANG Qi, CHEN Hui, TANG Ming, MAO Xinjie, LIAO Songkai, WEI Hongjian, LIN Haoyu
JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2025, Vol. 49 ›› Issue (5) : 191-199.
Effects of development and population growth potential of Perina nuda under different photoperiods
【Objective】This study investigates the developmental period and reproductive characteristics of the experimental population of Perina nuda under different photoperiods, aiming to provide scientific basis for population density regulation of P. nuda. 【Method】Laboratory artificial rearing was conducted using leaves of the most suitable host tree, Ficus microcarpa, for P. nuda. The experiments were carried out at a temperature of (26±1) ℃ and a relative humidity of 40%, with five different photoperiods: 16 L∶8 D, 14 L∶10 D, 12 L∶12 D, 10 L∶14 D, and 8 L∶16 D. The growth and developmental characteristics as well as reproductive capacity of the experimental population of P. nuda were observed at regular intervals. Using TWOSEX-MSChart and TIMING-MSChart softwares, the life table of experimental population was constructed and the trend of population change in 120 days was simulated. 【Result】The photoperiod significantly affected the growth and development of P. nuda. Under the 14 L∶10 D photoperiod, the developmental period from egg to adult death was the longest (50.17 days), while under the 10 L∶14 D photoperiod, it was the shortest (44.09 days). The photoperiod had a significant effect on the pupal weight of P. nuda. Under the 8 L∶16 D photoperiod, the weights of female and male pupae were the largest, and under the same photoperiod, the weight of female pupae was significantly higher than that of male pupae (P<0.01). The photoperiod had no significant effect on the sex ratio, survival rate, number of eggs laid per female, and net reproductive rate (R0) of P. nuda adults (P>0.05), but it significantly affected the intrinsic rate of increase (λ) (P<0.05). Under the 10 L∶14 D, and 8 L∶16 D photoperiods, the intrinsic rate of increase (rm) of P. nuda was significantly higher than that under 16 L∶8 D, 14 L∶10 D, and 12 L∶12 D (P<0.05). 【Conclusion】The photoperiod has a significant effect on the growth and development of P. nuda. The total development period of P. nuda is the shortest under short light, and the oviposition time of female moths is more concentrated, which indicates that short light is more suitable for the survival and development of P. nuda populations.
photoperiod / Perina nuda / developmental duration / life table / population parameter
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