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Effect of temperature on longevity and fecundity of Phyllonorycter ringoniella (Lepidoptera: Gracillariidae) and its oviposition model

Geng, Shubao, Jung, Chuleui
Journal of Asia-Pacific entomology 2017 v.20 no.4 pp. 1294-1300
Phyllonorycter ringoniella, Weibull statistics, adults, apples, eggs, fecundity, females, insect pests, longevity, models, orchards, oviposition, photoperiod, prediction, reproductive behavior, survival rate, temperature
Asiatic apple leafminer, Phyllonorycter ringoniella, is an important insect pest in apple orchards. However, information on its temperature-dependent reproductive behavior and oviposition model is lacking. The longevity and fecundity of P. ringoniella were investigated at seven constant temperatures (13.7, 15.6, 20.5, 23.7, 26.1, 30.2, and 32.3°C), 60–80% RH, and a photoperiod of 14:10 (L:D) h. The longevity and fecundity of P. ringoniella were significantly influenced by temperature. Female adult longevity ranged from 6.3days at 32.3°C to 18.3days at 15.6°C. The fecundity ranged from 9.9 eggs at 32.3°C to 65.2 eggs at 15.6°C. The preoviposition (1.5–4.1days) and oviposition (1.8–12.6days) periods were significantly affected by temperature, while the postoviposition (1.2–2.2days) period was not. Female adult aging rates (1/mean longevity) were well described by an inverse second-order polynomial function (r2=0.98), which was used to calculate the physiological ages of female adults. The oviposition model of P. ringoniella comprised four components: adult aging rate model, total fecundity model, age-specific oviposition rate model, and age-specific survival rate model. The relationship between mean total fecundity and temperature was well described by an extreme value function (r2=0.95). Age-specific cumulative oviposition rate was well fitted to a three-parameter Weibull function (r2=0.98) and age-specific survival rate to a sigmoid function (r2=0.99), respectively. The model would be useful in predicting egg occurrence of P. ringoniella and establishing a management strategy against P. ringoniella in apple orchards.