Effect of Different Concentrations of Fungal Filtrate from A. cymbiformis and A. jodhpurensis on the Life Performance of Aphis fabae (Hemiptera: Aphididae)

Abstract

This study was conducted to assess the influence of different concentrations of fungal filtrate from Amesia cymbiformis and Acrophialophora jodhpurensis on the life performance of the Aphis fabae, including adult and nymph mortality rates. Additionally, the impact on adult productivity was assessed. Four different concentrations of the fungal filtrate (25%, 50%, 75%, and 100%) were employed for both fungi. The results demonstrated substantial differences in mortality rates associated to the concentration of fungal filtrate from both A. cymbiformis and A. jodhpurensis. The 100% concentration had the highest adult mortality rates, reaching 75% and 69%, respectively. The 100% concentration of A. cymbiformis fungal filtrate had in the highest mortality rate for first nymphal stages at 82%, followed by second nymphal stages at 79.46%. The third and fourth nymphs showed mortality rates of 73.94% and 71%, respectively. Similarly, the 100% concentration of A. jodhpurensis fungal filtrate caused in the highest mortality rate for first nymphal stages at 82.5%, with second, third, and fourth nymphs stage displaying mortality rates of 78%, 74.6%, and 71.5%, respectively. The study also found a significant impact on the lowering of adult productivity. The average number of nymphal stages produced by adult A. fabae aphids using a 75% concentration of fungal filtrates from A. cymbiformis and A. jodhpurensis was 1.64 and 1.7 nymphs/female, respectively, compared to the control treatment, which showed an average of 3.82 nymphs/female after 5 days.