Articles
IN VITRO BIOLOGICAL CONTROL OF APHID OF PAPAYA BY BEAUVERIA BASSIANA
Article number
1022_14
Pages
113 – 117
Language
English
Abstract
In the year of 2010 and 2011, the observations on aphid colonization on papaya plants (One year old) in the field showed maximum aphid population (500/plant and 600/plant respectively) in the month of April.
This aphid was recorded on two ornamental plants (Jatropha pandurifolia And. and Hibiscus rosa sinensis L.) and its colonizations were recorded and they were 460 and 695/plant respectively in the year 2010 and they were 585 and 500/plant respectively in the year 2011.
Three isolates (BB1, BB2 and BB3) of the entemopathogenic fungi Beauveria bassiana were isolated and their spore suspensions of 107/ml were applied on Aphis population in a laboratory trial and it was observed that BB1 isolate was best (70%) to give the percent of mortality of nymphs of Aphis sp. followed by BB3 (65%) and BB2 (50%). The ED50 of BB1 was recorded and it is 106 spore/ml.
Microscopical study of dead Aphis due to B. bassiana was done and growth of mycelium of this fungus inside of this insect was recorded and photographed.
Therefore, this study suggested the application of Beauveria bassiana (BB1) would be an alternative ecofriendly control measure of this vector (A. gossypii) of Papaya ring spot virus (PRSV) and Papaya mosaic virus (PMV).
This aphid was recorded on two ornamental plants (Jatropha pandurifolia And. and Hibiscus rosa sinensis L.) and its colonizations were recorded and they were 460 and 695/plant respectively in the year 2010 and they were 585 and 500/plant respectively in the year 2011.
Three isolates (BB1, BB2 and BB3) of the entemopathogenic fungi Beauveria bassiana were isolated and their spore suspensions of 107/ml were applied on Aphis population in a laboratory trial and it was observed that BB1 isolate was best (70%) to give the percent of mortality of nymphs of Aphis sp. followed by BB3 (65%) and BB2 (50%). The ED50 of BB1 was recorded and it is 106 spore/ml.
Microscopical study of dead Aphis due to B. bassiana was done and growth of mycelium of this fungus inside of this insect was recorded and photographed.
Therefore, this study suggested the application of Beauveria bassiana (BB1) would be an alternative ecofriendly control measure of this vector (A. gossypii) of Papaya ring spot virus (PRSV) and Papaya mosaic virus (PMV).
Publication
Authors
S.K. Ghosh, N. Chakraborty, P.P. Biswas
Keywords
colonization, mortality, papaya mosaic virus, Aphis gossypii
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