Archives of Phytopathology and Plant Protection (2011) 44, 57-66

A.M.E. Abd El-Salam and F.M.A. El-Hawary (2011)
Lethal and pathogenic effects of Beauveria bassiana and Lecanicillium lecanii on the adult and nymph of Aphis craccivora Koch
Archives of Phytopathology and Plant Protection 44 (1), 57-66
Abstract: Two strains of entomopathogenic fungi such as Beauveria bassiana and Lecanicillium lecanii in two commercial formulations were screened for A. craccivora control. Entomopathogenic fungi L. lecanii showed the higher virulent pathogenicity than B. bassiana for both adult and nymph stages of A. craccivora. The virulence of L. lecanii caused 100% mortality in adults over three days at a concentration of 5.0 ml/l (5 x 10⁶ spores/ml), while the same fungi achieved 100% mortality in nymphs over three days but at a concentration of 1.0 ml/l (1 x 10⁶ spores/ml). The lethal time of 50% of individuals (LT₅₀) decreased significantly as the applied spore concentration increased. L. lecanii also exhibited the highest virulence to A. craccivora. The 50% lethal concentration (LC₅₀) of the spore suspension of this fungus was determined to be 0.638 and 0.16 ml/l for adult and nymph stages, respectively. The developmental periods of the nymphal stage increased significantly as the applied spore concentration increased. Lecanicillium lecanii fungi was more effective than Beauveria bassiana in reduction of the number of young borne produced by the adult stage. The results indicated that the nymphal stages of aphids exposed to the virulents of L. lecanii or Beauveria bassiana formulations prolonged the developmental period of its instars.
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Link to article at publishers website

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Aphis craccivora
Beauveria bassiana (entomopathogen)	Aphis craccivora
Akanthomyces lecanii (entomopathogen)	Aphis craccivora