Using Viable Eggs to Determine Oviposition Models and Life Table Analysis of Riptortus pedestris (Fabricius) (Hemiptera: Alydidae)
2019
Ahn, J.J., National Institute of Horticultural and Herbal Science, Jeju, Republic of Korea | Choi, K.S., National Institute of Horticultural and Herbal Science, Jeju, Republic of Korea | Koh, S.W., National Institute of Horticultural and Herbal Science, Jeju, Republic of Korea
Riptortus pedestris (Fabricius) (Hemiptera: Alydidae) is an economically important insect pest of soybean and fruit trees. We investigated the temperature effects on the adult fecundity and longevity, and determined the parameters of oviposition models and life table at different constant temperatures 15.8, 19.7, 24.0, 27.8, 32.6, 34.0, and 35.5°C. R. pedestris females reproduced successfully from 19.7 to 35.5°C except 15.8°C. The longevity of R. pedestris was longest at 15.8°C and it decreased with increasing temperature (76.6 days at 19.7°C and 20.6 days at 35.5°C). The number of total eggs and viable eggs was highest at 24.0°C (193.5 and 151.2). Egg hatchability was highest at 27.8°C (84.0%). We compared the results of oviposition models and life table parameters using both total eggs and viable eggs. The parameter value (c: the maximum reproductive capacity) (190 eggs) of temperature dependent total fecundity model using total eggs was higher than that of the model using viable eggs. When we analyzed the life table parameter the values of net reproductive rate and mean generation time using viable eggs were lower than those using total eggs. The oviposition models and life table analysis using viable eggs will be helpful to understand the real population transition of R. pedestris in agricultural system.
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