Effects of Different Temperatures on the Development and Reproduction of Sitobion miscanthi From Six Different Regions in China

The increase in temperature caused by global warming has greatly impacted plant growth and pest population dynamics worldwide, especially for wheat aphids. In this study, Sitobion miscanthi individuals from six geographic populations located different wheat-producing areas China were compared with regard to their growth, development, survival, reproductive under conditions (17, 22 27°C). A life-table analysis a correlation between factors S. longevity or fecundity also performed. Temperature significantly affected the nymphal development duration (NDD), adult (ALY) (AFY) of aphids, however, latitude can only affect NDD ALY. There is an obvious interaction on NDD, ALY, AFY. three northern was shorter than that southern populations. ALY longer at temperatures. Except Yinchuan no degrees, other shortened 27°C. AFY lower 22°C, while higher With temperature, gradually decreased 17 suddenly curves survival rate ( s xj ) population. Especially Suzhou Wuhan, which rapidly Age-specific l x began decline 15 days age 27°C, those not until 20 age. highest peaks age-stage f ), age-specific m net maternity occurred addition, there positive fecundity. Our result proved requires aphids live suitable ambient aphid north have wider ecological amplitude. results will be helpful predicting potential outbreaks China’s main conditions.