Adaptability of the Soybean Aphid Aphis glycines (Hemiptera: Aphididae) to Temperature and Photoperiod in a Laboratory Experiment

The soybean aphid, <i>Aphis glycines</i> Matsumura, 1917, is a crucial soybean pest. Cultivated soybean, <i>Glycine max</i> (Carl von Linné) Elmer Drew Merrill, 1917, and wild soybean, <i>Glycine soja</i> Philipp Franz von Siebold & Joseph Gerhard Zuccarini, 1843, are summer hosts of <i>A. glycines</i>. In this study, the development, reproduction, and morphogenesis of <i>A. glycines</i> fed wild soybean (<i>Ag</i>FW) were studied at different temperatures and photoperiods. The data were compared with that of <i>A. glycines</i> fed soybean (<i>Ag</i>FS). At 20-29 °C, the adult lifespan of the first-third-generation <i>Ag</i>FW was shorter than or equal to that of <i>Ag</i>FS. Significant differences existed in the adult fecundity and intrinsic rate of increase between <i>Ag</i>FW and <i>Ag</i>FS. At a 10L:14D h photoperiod, males of <i>Ag</i>FW were deposited earlier than, or as early as, males of <i>Ag</i>FS. At 17 °C, the gynoparae of <i>Ag</i>FW were deposited in proportions greater than or equal to those of <i>Ag</i>FS. Based on these results, we concluded that the adaptability of <i>Ag</i>FW and <i>Ag</i>FS to temperature and photoperiod significantly differs. It is important to understand the life cycle of <i>A. glycines</i> in Harbin, northeast China, and formulate an integrated pest management strategy for <i>A. glycines</i> in the region.