Effects of Temperature and Relative Humidity on the Embryonic Development of Hypera postica Gyllenhal (Col.: Curculionidae)

摘要: The combined effect of the temperature and relative humidity on survival development time eggs Spanish populations weevil Hypera postica, a key pest alfalfa around world, was evaluated under laboratory conditions. experimental temperatures ranged from 8 to 36 °C, in 4 °C increments. Three ranges were defined: high, medium, low. Eggs successfully developed until larval emergence at all 24 conditions tested. However, affected eggs. egg developmental decreased as increased 32 longest recorded low (RH). relationship between rate fit well lineal model for humidity. minimum threshold (T0) thermal requirement (K) 3 209 246 degree-days, respectively. According these values occurrence larvae (in winter) adults autumn) field samplings, period oviposition determined. results study contribute better understanding annual cycle phenology H. postica Iberian Peninsula southern Europe.