Biology and predatory potential of Chrysoperla zastrowi sillemi (Esben-Peterson) (Neuroptera: Chrysopidae) on Aphis gossypii Glover and Phenacoccus solenopsis Tinsley in laboratory conditions

Abstract

A research trial was conducted to investigate the significance of the development and predatory potential of Chrysoperla zastrowi sillemi (Esben-Peterson) (Neuroptera: Chrysopidae) against sucking pests, Aphis gossypii Glover (Aphididae: Hemiptera) and Phenacoccus solenopsis Tinsley (Pseudococcidae: Hemiptera) under laboratory conditions during 2023-2024. Among the seven larval diets tested, the shortest larval (8.13 ± 0.29 days) and pupal period (7.73 ± 0.06 days), highest adult longevity (M: 24.26 ± 0.24 days, F: 38.66 ± 0.46 days), and maximum fecundity (447.33 ± 21.71) were observed, when the C. zastrowi sillemi larvae fed on eggs of C. cephalonica followed by adults of A. gossypii. These larval diets proved to be the most suitable regime for supporting the optimal growth and development of C. zastrowi sillemi. The predatory potential of C. zastrowi sillemi increased with larval stage advancement. Maximum predation rate was observed when Chrysoperla larvae fed on the first instars of P. solenopsis (893.66 ± 13.73), followed by eggs of C. cephalonica (724.33 ± 24.67) and nymphs of A. gossypii (495.33 ± 5.81). Results suggested that C. zastrowi sillemi could be a potential alternative to conventional insecticides for managing A. gossypii and P. solenopsis. It can be effectively used as a sustainable and environmentally sound component for integrated pest management strategies.