Cladosporium uredinicola SPEG. AND Alternaria infectoria E. G. SIMMONS, AS PROMISING BIOCONTROL AGENTS FOR Bemisia argentifolii BELLOWS&PERRING AND Aphis gossypii GLOV. ON TOMATOES

Document Type : Original Article

Author

Economic Entomology Department, Faculty of Agriculture, Mansoura University

Abstract

Two entomopathogenic fungi, namely Cladosporium uredinicola and
Altemaria infectoria were isolated from naturally infected nymphs and adults of both
Bemisia argentifolii and Aphis gossyp < /em>ii infesting tomato plants. C. uredinicola was the
rnosj dorninant species found with a rate of 35.8% and 35% on both B.argentifolii and
Agossypii, respectively. A infectoria ranked second and was represented by 8.6% on
B. argentifolii and 12% on Agossyp < /em>ii. Laboratory bioassay studies indicated that C.
uredinicola caused a higher mortality than A infectoria for the two insect species at
conidial concentration of 10 x 106 spores/ml, 4 days after treatment. The efficacy of
both fungi as biocontrol agents against B. argentifolii and Agossyp < /em>ii under semi-field
conditions was also evaluated at fungal concentrations of 10 x 106 and 5 x 106
spore/ml.

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