Oviposition model of Cnaphalocrocis medinalis Guenee (Lepidoptera: Pyralidae)

The longevity and fecundity of Cnaphalocrocis medinalis were investigated at temperatures of 15.0, 17.5, 20.0, 22.5, 25.0, 27.5, 30.0,32.5, and 35.0 degrees C. Adult longevity and fecundity were significantly influenced by temperature. Longevity decreased with increasing temperature: it was highest at 15.0 degrees C (23.6 +/- 3.51 days) and lowest at 35.0 degrees C (6.4 +/- 0.48 days). Fecundity was highest at 25.0 degrees C (170.5 +/- 45.54 eggs) and lowest at 17.5 degrees C (11.0 +/- 3.68 eggs). The oviposition period was longest at 20.0 degrees C (8.0 +/- 1.09 days) and shortest at 35.0 degrees C (2.3 +/- 0.48 days). The oviposition model presented in this study consisted of two reproductive components (total fecundity and agespecific cumulative oviposition rate) and a survival component (age-specific survival rate). The relationship between adult developmental rate and temperature was described by the Lactin 2 model (r(2) = 0.98, p < 0.0001). The age-specific survival rate was well explained by a sigmoid function (r(2) = 0.97, p < 0.00001). The age-specific cumulative oviposition rate was best described by the three-parameter Weibull function (r(2) = 0.99, p < 0.00001). Temperature-dependent fecundity was estimated using the Briere-2 model (r(2) = 0.94, p < 0.007). Daily egg production of C medinalis in relation to adult age and temperature was estimated. (C) 2014 Korean Society of Applied Entomology, Taiwan Entomological Society and Malaysian Plant Protection Society. Published by Elsevier B.V. All rights reserved.