Demography of <i>Aphis glycines</i> Matsumura (Hemiptera: Aphididae) on 4 soybean germplasms

The soybean aphid, Aphis glycines Matsumura, is a major pest that can significantly reduce soybean yields during heavy infestations. Planting resistant varieties is essential for managing this pest, requiring effective breeding and screening. In the United States, Dowling is resistant while Williams 82 is susceptible to A. glycines. This study assessed A. glycines from Harbin, China, feeding on soybean varieties Dowling, Williams 82, Shennong 9, and line P 3 under controlled conditions. Results showed that A. glycines thrived on Dowling and Williams 82, with no significant differences in longevity, oviposition, or fecundity. Line P 3 showed greater resistance to A. glycines than Dowling, with shorter adult longevity and lower fecundity. Shennong 9 was more susceptible than Williams 82, exhibiting longer adult longevity and higher fecundity. P 3 may serve as a valuable resource for breeding resistant soybeans, while Shennong 9's susceptibility could aid in control strategies. These results are crucial for developing A. glycines-resistant soybean varieties.