Effect of conidial concentration of entomopathogenic fungi on mortality of cabbage aphid, Brevicoryne brassicae L

An experiment was conducted to study effect of different conidial concentrations of some isolates of entomopathogenic fungi; Verticillium lecanii (V 17), Paecilomyces fumosoroseus (n32), Metarhizium anisopliae (M440) and (L6) against adults of aphid, Brevicoryne brassicae L. under laboratory conditi...

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Published in:Pakistan journal of life and social sciences 2009, Vol.7 (2), p.175-180
Main Authors: Asi, M.R. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agriculture Entomology), Bashir, M.H. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agriculture Entomology), Afzal, M. (Sargodha Univ. (Pakistan). Univ. Coll. of Agriculture), Imran, S
Format: Article
Language:English
Subjects:
Aphididae
APPLICATION RATES
Brassica
BREVICORYNE BRASSICAE
ENTOMOGENOUS FUNGI
FUNGAL SPORES
INSECT CONTROL
METARHIZIUM ANISOPLIAE
PAECILOMYCES FUMOSOROSEUS
PEST INSECTS
VERTICILLIUM LECANII
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Summary:An experiment was conducted to study effect of different conidial concentrations of some isolates of entomopathogenic fungi; Verticillium lecanii (V 17), Paecilomyces fumosoroseus (n32), Metarhizium anisopliae (M440) and (L6) against adults of aphid, Brevicoryne brassicae L. under laboratory conditions at department of Entomology, University of Agriculture, Faisalabad during spring 2008. The experiment was conducted under CRD with four replications of each treatment. The concentration of conidia affected mortality of the aphids differently (P less than 0.001) in all investigated fungal isolates. Mortality of the aphids increased with increase in spore concentration and exposure time. The fungal isolate V. lecanii (V17), with LC50 of 1.88 x 10(6) Conidia ml-1 was considered the most virulent isolate among investigated fungal isolates followed by P. fumosoroseus (n32), M. anisopliae (L6) and M. anisopliae (M440) with LC50 values of 2.22 x 10(6), 3.48 x 10(6) and 5.30 x 10(6) conidia ml-1, respectively 7 days after inoculation against the aphid.
ISSN:1727-4915