Abstract:

In order to elucidate the biological characteristics of Phenacoccus solenopsis Tinsley on host potato leaves, this study conducted indoor feeding observations to investigate the life history, developmental changes, physiological transitions, and reproductive features of P. solenopsi on potato leaves. The findings revealed that P. solenopsi reproduces through amphitrogenesis, with distinct developmental periods for female and male insects. Female development encompasses egg, larvae, and adult stages, while male development includes egg, larvae, pre-pupae, pupae, and adult stages. Furthermore, the developmental time of female and male insects varies depending on their developmental periods. The developmental period for male larvae and pupae was 14-23 days, with a total lifespan of 18-25 days; whereas the developmental period for female larvae was 12-21 days, with a total lifespan of 26-54 days. Additionally, the dark coloration of the dorsal black spots in both male and female insects can serve as indicators for distinguishing each instar.

Key words: Phenacoccus solenopsis Tinsley, potato leaves, biological characteristics