Research articles
ScienceAsia 49 (2023):ID 22-28 |doi:
10.2306/scienceasia1513-1874.2023.128
Pathogenicity of Beauveria bassiana and laboratory
assessment with selective pesticides
S. M. Bisandrea, Y. V. Ingleb,*, G. K. Landec, M. D. Girid
ABSTRACT: Beauveria bassiana is one of the most promising entomopathogenic fungus species utilized for pest control.
The pathogenicity of B. bassiana was tested by spraying spore suspension directly on third instar larvae of Helicoverpa
armigera. The highest larval mortality (80.00%) was achieved by application of spore load of 1011 conidia/ml. It is
needed to determine the effects of pesticides on B. bassiana as it is to be included in a pest management program. The
compatibility of fungi with selected pesticides commonly used in plant protection was investigated in this study. Nine
different insecticides were evaluated at two different doses (recommended dose and half of recommended dose) under
in vitro condition against B. bassiana by poison food technique. Fipronil and spiromesifen significantly supported the
maximum growth (4.03 and 3.85 cm, respectively) of B. bassiana at half of recommended dose, while the remaining
insecticides appeared to be toxic to the tested fungus. Ten different fungicides were also tested in vitro against
B. bassiana at half and recommended doses; potassium phosphonate supported maximum radial mycelial growth of
2.98 cm (at half of recommended dose) and 2.36 cm (at recommended dose), whereas carbendazim + mancozeb and
fluxapyroxad + pyraclostrobin appeared harmful by restricting the growth of the B. bassiana at both doses. This study
demonstrated the varying pesticide effects on fungi; however, their actual effects at the cellular and field levels must
be investigated to determine whether the effects are permanent or temporary.
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a |
Department of Plant Pathology, Dr. PDKV, Akola-444104 (MS) India |
b |
AICRP on Fruits, Dr. PDKV, Akola-444104 (MS) India |
c |
Department of Agricultural Entomology, Dr. PDKV, Akola-444104 (MS) India |
d |
Pulses Research Unit, Dr. PDKV, Akola-444104 (MS) India |
* Corresponding author, E-mail: yvingle@pdkv.ac.i
Received 13 Mar 2022, Accepted 29 Jun 2022
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